... absorption, the ac Stark effect (shift and the broadening of the level due to the field interaction), and the parameters in nonlinear opt i';, .ich as the ...

The ac Stark shift of the resonance frequency of the nonlinear magneto-optic effect (NMOE) results in a fundamental broadening of this resonance which limits the precision of optical magnetometry based on NMOE. We have studied the dependence of the ac Stark shift versus frequency of the probing ...

Nonlinear electron dynamics in semiconductor quantum structures define a rich scientific arena with potential impact on novel devices in the terahertz regime. An important concept is photon assisted transport marked by new transport channels, opened by th...

Nonlinear magneto-optical rotation (NMOR) is investigated at highlight powers where the rotation is significantly modified by AC Stark shifts. These shifts are shown to change the overall sign of rotation for closed F-->F+1 transitions as light power is increased. The effect is demonstrated by measurements in rubidium and density ...

We demonstrate a technique for exciting spin waves in an ultracold gas of 87Rb atoms on the basis of tunable ac Stark potentials. This technique allows us to excite normal modes of spin waves with arbitrary amplitudes in the trapped gas, including dipole, quadrupole, octupole and hexadecapole modes. These modes exhibit strong ...

We have performed spectroscopic measurements of a superconducting qubit dispersively coupled to a nonlinear resonator driven by a pump microwave field. Measurements of the qubit frequency shift provide a sensitive probe of the intracavity field, yielding a precise characterization of the resonator nonlinearity. The qubit linewidth has a complex dependence ...

Coupling a superconducting qubit to a superconducting resonator enables to investigate the interaction between light and matter with a unique flexibility of design, and allows to reach coupling regimes hardly accessible otherwise [Wallraff Nature 2004]. In this talk, we discuss the ac-Stark shift and the measurement induced dephasing of a qubit embedded in a ...

It is shown that the resonant enhancements of the optical Kerr effect and the optical Stark effect of the same order are caused by the same change in the state of an atomic system. The analysis of the known experimental data demonstrates the identity of their influence on nonlinear optical processes. It is shown that a separate analysis of the influence of ...

... Technical Report #20 Linear and Nonlinear Spectroscopy With the Tunable AC Scanning Tunneling Microwoe by ... W0 oC ac W01 ...

In this thesis the ultrafast optical properties of a series of InGaAs samples ranging from the two to the three dimensional limit are discussed. An optical system producing 150 fs continuum centered at 1.5 microns was built. Using this system, ultrafast pump-probe and four wave mixing experiments were performed. Carrier thermalization measurements reveal that screening of the Coulomb interaction ...

... Accession Number : ADP007867. Title : Optical Nonlinearity through Internal Field Screening in Intrinsic Stark Effect Strained-Layer Superlattices,. ...

We have directly monitored the rf Stark-field-induced splitting of the gain profile of the 1222-..mu..m /sup 13/CH/sub 3/F optically pumped far-infrared (OPFIR) laser transition. The resulting data are found to be in good agreement with ac Stark theory. Comparison with dc Stark tuning techniques shows that the rf ...

The authors directly monitored the rf Stark-field-induced splitting of the gain profile of the 1222 micrometer /sup 13/CH/sub 3/F optically pumped far-infrared (OPFIR) laser transition. The resulting data are found to be in good agreement with ac Stark theory. Comparisons with dc Stark tuning techniques shows that ...

Numerical ab initio variational calculations of the transition probabilities and ac Stark shifts in two-photon transitions of antiprotonic helium atoms driven by two counter-propagating laser beams are presented. We found that sub-Doppler spectroscopy is, in principle, possible by exciting transitions of the type (n,L)?(n-2,L-2) between antiprotonic states ...

We study theoretically the problem of a hydrogen atom exposed both to a static dc field and to a monochromatic ac field. We show that, in the presence of an ac field, a constructive (or destructive) interference occurs between the excited (Rydberg) Stark resonance states and the hydrogenic ground state. This mechanism is responsible ...

We describe an analysis and experimental results of the manipulation of motional states of a single trapped 40Ca+ ion based on sideband excitation by rapid adiabatic passage. When the sideband transition is excited by rapid adiabatic passage, adiabaticity may be affected by ac Stark shifts. We investigate the influence of ac ...

This annual report describes research on two-photon pumping of molecular lasers operating on hot band transitions of the molecules and the associated nonlinear effects (Raman and hyper-Raman) that contribute to the gain spectrum of the molecular system. Accessing the hot bands of a molecule results in more lasing transitions that would otherwise be observed, and modifies the ...

We report on an experimental and theoretical study of thedynamic (ac) Stark effect on a for bidden transition. A general frameworkfor parameterizing and describing off-resonant ac-Stark shifts ispresented. A model is developed to calculate spectral line shapesresulting from resonant excitation of atoms in an intense standinglight-wave ...

A general program has been developed to calculate multi-photon processes in atomic hydrogen to arbitrarily high order in perturbation theory. This program can be used to calculate quantities in intense field multiphoton processes, such as the generalized cross section of multiphoton absorption, the a.c. Stark effect (shift and the broadening of the level ...

... longitudinal and transverse diffraction, non-resonant non-linearities, local field effects, Stark shifts, (3) numerical studies of the transverse behavior ...

... Abstract : Conventional self-electrooptic effect device (SEED) is based on the so-called quantum-confined Stark effect (QCSE), which results in the ...

The ac Stark effect is a well-known, well-established effect associated with the displacement of the atomic energy levels in the presence of an electromagnetic (e.m.) field. As the origin of the e.m. field is irrelevant, a self-induced ac Stark effect should be present in a laser. However, not only has this effect ...

We present a theoretical description of the interaction of optical waves due to the resonant nonlinear response of an atomic system. We emphasize how the resonant nature of the nonlinear coupling is modified by the shifting of the atomic energy levels as ...

A strong nonlinear optical effect has been predicted for strained-layer superlattices (SL's) grown with III-V semiconductors along axes other than 100. These materials have been denoted intrinsic Stark-effect superlattices (ISES) because the strain genera...

The pressure dependence of the ac Stark effect for the two-photon A/sup 2/..sigma../sup +/, v' = 0left-arrowX /sup 2/Pi, v'' = 0 transition in NO is studied by using laser-induced fluorescence. Contrary to earlier results obtained by using multiphoton-ionization detection for the same transition (Demaray et al., J. Chem. Phys. ...

We demonstrate the cancellation of the differential ac Stark shift of the microwave hyperfine clock transition in trapped {sup 87}Rb atoms. Recent progress in metrology exploits so-called magic wavelengths, whereby an atomic ensemble can be trapped with laser light whose wavelength is chosen so that both levels of an optical atomic transition experience ...

The theories of the dilatation, r ..-->.. re/sup i theta/, and translation, x ..-->.. x + iq, transformations as related to the Stark problem are reviewed, and new results obtained. Results for the hydrogen atom n = 1 and n = 2 levels and the /sup 1/P/sup 0/, 2s2p H/sup -/ shape resonance in dc fields are presented, and the extension to the ac ...

... Proceedings of Symposium on Non-Linear Optics, ACS Meeting, Held in Boston, Massachusetts 1990. Descriptive Note : Technical rept. ...

We have investigated the nonlinear optical properties of a new class of strained-layer superlattices, the intrinsic Stark effect superlattices (ISES). The superlattices consisted of GaInAs/GaAs grown along the (211)B direction. We observed a shift of the excitonic absorption to higher energies (blue shift) with increasing intensity of the transmitted beam. ...

We propose a method to decelerate polar molecules from a beam using a microwave field. A moving standing wave of a microwave electric field causes an ac Stark shift to polar molecules and decelerates them. The method is applicable to polar molecules in rotational ground states and can be used to directly load a microwave trap. Numerical simulations are ...

We propose a method to decelerate polar molecules from a beam using a microwave field. A moving standing wave of a microwave electric field causes an ac Stark shift to polar molecules and decelerates them. The method is applicable to polar molecules in rotational ground states and can be used to directly load a microwave trap. Numerical simulations are ...

The bound-electronic optical nonlinearities in highly excited semiconductors (i.e., semiconductor lasers) have been calculated using a two-parabolic-band model. The nonlinear absorption spectrum is first obtained using a dressed-state formalism taking into account the contributions from two-photon absorption, electronic Raman, and optical ...

The influence of ac Stark shifts on the three-photon ionization of cesium in a moderate-intensity laser beam is investigated. The ionization process involves a two-photon resonance with the 8d fine-structure levels. The work consists of two related parts. In the first part, atomic parameters, such as the two-photon Rabi rate and the ac ...

The ERP lineshifts occurring in ruby when stressed with DC, modulated DC and AC fields are described. It is shown that the space charge effects which might influence the DC results can be overcome by modulating the stressing voltage. The lineshift sensiti...

Some experimental results of the application of small electric fields on an optically pumped metal-dielectric far infrared (FIR) waveguide laser are shown. It is demonstrated that sizable modulation of the FIR output power can be obtained with ac fields.

... It is also important for estimating the line shape functions at low-carrier densities. ... the ac-Stark effect under low real-excited carrier density conditions ...

High resolution, quasi-cw, stimulated Raman-gain spectroscopy has become a standard technique for the study of molecular energy levels. In this paper we apply this technique to the study of two diverse problems: a determination of the ac Stark effect for ...

Improved atomic beam deflection and improved isotope separation, even in vapors, is proposed by substituting the A.C. Stark effect for the baseband chirp of the pushing beam in the prior proposal by I. Nebenzahl et al., Applied Physics Letters, Vol. 25, page 327 (September 1974). The efficiency inherent in re-using the photons as in the Nebenzahl et al ...

Laboratory techniques to manipulate and observe ultracold atoms make these an attractive platform for testing new ideas in quantum control and measurement. I will discuss recent experiments in which we use tensor AC Stark shifts and magnetic fields to drive non-trivial quantum dynamics of a large spin-angular momentum associated with an atomic hyperfine ...

We investigate a singly charged quantum dot under a strong optical driving field by probing the system with a weak optical field. We observe all critical features predicted by Mollow for a strongly driven two-level atomic system in this solid state nanostructure, such as absorption, the ac-Stark effect, and optical gain. Our results demonstrate that even at high optical field ...

We report photoionization measurements that help us interpret mechanisms leading to the control of the branching ratio for resonantly enhanced, two-color, two-photon ionization experiments. We measure intermediate state populations and photoelectron angular distributions to explore the ionization dynamics. Our measurements support the interpretation that ac ...

Multiphoton excitation in a two-level system is exceedingly weak because of small multiphoton coupling strengths, large ac Stark shifts, and ionization. I will discuss a three-level system in which the ac Stark shift is greatly reduced and the multiphoton coupling strength is greatly enhanced over a two-level ...

By setting laser beams in two-photon Doppler-free configurations for both cascade and ?-type subsystems in a four-level inverted-Y system, a four-wave mixing (FWM) process is studied and optimized within the Doppler profile. The two-photon ac-Stark effect in the FWM signal is observed, which can be used to determine the energy level shift of the atom due to dressing fields.

When pumping near the two-photon 3d resonance in pure sodium vapor and observing the backward hyper-Raman emission to the 3p substates, an asymmetry in ratios of 3p/sub 1/2/, 3p/sub 3/2/ associated emissions was observed dependent upon the direction of the initial laser detuning from the resonance. It has been determined that this asymmetry can be attributed to the ac ...

Using a Sturmian function expansion we have computed the nth order coefficients E/sub n/(..omega..), for 2less than or equal toless than or equal to2, in the perturbation expansion of the ac Stark effect in the hydrogen 1s state. An ''effective convergence'' similar to that in the dc case is observed. A parametrization ...

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Apr 2, 2004 ... For other papers in this series see http://www.maths.ed.ac.uk/preprints. 1 ... � Email: J.Gondzio@ed.ac.uk, URL: http://maths.ed.ac.uk/~gondzio/ ...

We report observations of the dynamics of electromagnetically induced transparency (EIT) in a {lambda} system when the ground states are Stark shifted. Interactions of this type exhibit large optical nonlinearities called Kerr nonlinearities, and have numerous applications. The EIT Kerr nonlinearity is relatively ...

Electronic and optical multistabilities have been demonstrated in an InGaAs/InP Wannier-Stark modulator with a passive electronic feedback in a waveguide configuration. The device investigated here operates at remarkably low powers and at a wavelength of most widespread use in telecommunications. This achievement might very well play a role in the development of future ...

This research included the development of novel laser techniques which allow fundamental studies of atoms, molecules and solids, especially relaxation phenomena in the time domain. The stark and laser frequency switching techniques were examples which bri...

Expressions for the components of a nonlinear ac conductivity tensor have been derived - corresponding to a temperate, weakly ionized, lossy magnetoplsma. The electrical conductivity tensor is nonlinear because its components are functions of the isotropi...

In this paper we numerically investigate the nonlinear propagation of defect state in one-dimensional structures with defects. We investigate the nonlinear transmission spectra and the bistable response for defective structures with different index gradients. The results show that positive Kerr nonlinearity can suppress the ...

Anticrossing signals S-D and S-F in n = 4 of He/sup +/ show a distinct shift with the static electric field applied to induce the signals. This allows investigation of the nonlinear Stark effect of the fine structure'' at electric fields of 50 to a few hundred V cm/sup -1/, a region inaccessible to experiment so far. Within ...

We analyze changes of the electronic structure of a triangular molecule under the influence of an electric field (i.e., the Stark effect). The effects of the field are shown to be anisotropic and include both a linear and a nonlinear part. For strong electron correlations, we explicitly derive exchange couplings in an effective spin Hamiltonian. For some ...

, , {hjshin, btzhang}@scai.snu.ac.kr, ytkim@comp.snu.ac.kr Feature Selection with Non-linear PCA and Science, Seoul National University . . DF(Document Frequency) , DF (PCA) . (nonlinear PCA) locally linear PCA kernel PCA . 1. (category) . (regression model), (Naive Bayesian probabilistic model, NB

The nonlinear stationary ac response of the magnetization of assemblies consisting of (i) noninteracting uniaxial superparamagnetic nanoparticles with aligned easy axes and (ii) randomly oriented nanoparticles subjected to superimposed ac and dc bias magnetic fields of arbitrary strength and orientation is calculated by averaging ...

We study the dependence of the ac Stark shifts of electronic energies on the molecular orientation relative to the polarization direction of an incident intense laser field, using a three-dimensional non-Hermitian Floquet method and H2+ as a model system. Simultaneously, we also study the orientation-dependent high-order harmonic generation (HHG) and ...

This paper describes an active power filter for nonlinear ac loads with the power part carried out in the bridge connection. A theoretical approach to the implementation of the current reference is given for this original solution of the serial active filter. The paper also provides experimental results of the filter application on two specific ...

The blackbody radiation shift, a manifestation of the Stark effect caused by blackbody radiation, contributes to the systematic uncertainty in Cs-based frequency standards at a level of 1 x 10(-15). Few measurements of the third-order scalar electric polarizability of the Cs ground states, mainly responsible for the ac Stark shift in ...

The burgeoning fields of quantum computing and quantum key distribution have created a demand for a quantum memory. The gradient echo memory scheme is a quantum memory candidate for light storage that can boast efficiencies approaching unity, as well as the flexibility to work with either two- or three-level atoms. The key to this scheme is the frequency gradient that is placed across the memory. ...

The burgeoning fields of quantum computing and quantum key distribution have created a demand for a quantum memory. The gradient echo memory scheme is a quantum memory candidate for light storage that can boast efficiencies approaching unity, as well as the flexibility to work with either two- or three-level atoms. The key to this scheme is the frequency gradient that is placed across the memory. ...

The nonlinear diffusion of magnetic flux into a superconducting sample can be studied by measuring the relaxation of the magnetisation after application of a step field or by measuring the ac susceptibility, (chi)(sub 1) and its third harmonic, (chi)(sub ...

*Numerical Analysis Report NA/195, Department of Mathematics, University of Dundee ... fletcher@maths . dundee . ac . uk, sleyffer@maths . dundee . ac . uk ...

The influence of an additional perturbation (the ac Stark effect) of neutral barium atoms on the formation of doubly charged ions in the course of ionisation of these atoms by visible light (by the second harmonic radiation of an yttrium-aluminium garnet laser) was investigated experimentally. The frequency-tunable radiation of a colour-centre laser ...

... P - +Pk2 where Pki if ... ac Velocity versus phase, a comparison between Cutler's experiment and our ... is a one- valued function of distance, ie electron ...

The quantum Smoluchowski equation for the reduced Wigner function in configuration space pertaining to the quantum Brownian motion of a particle in a tilted cosine potential in the high dissipation (or noninertial) limit as applied to a model point Josephson junction (namely, a resistively shunted junction in the presence of noise and an arbitrarily large microwave ac driving ...

We apply a Langevin model to investigate the nonlinear ac responses of electro-magnetorheological (ERMR) fluids under the application of two crossed dc magnetic (z axis) and electric (x axis) fields and a probing ac sinusoidal magnetic field. We focus on the influence of the magnetic fields which can yield ...

... and Semimetals, edited by RK dillardson and AC Beer, Academic Press ... at Electro-Oprics/Laser 78 Conference, Boston, Massachusetts, September ...

... Specific projects involved the permanent magnet synchronous, switch reluctance, induction and DC motors, power electronics devices, including ...

The ac free-electron laser (ac FEL) uses an ac (temporally oscillating but spatially uniform) field as the pump source with the hope that electromagnetic radiation will be produced with wavelength shorter than that can be generated by a conventional magnet FEL. The ac field can be provided by a superconducting ...

A superconducting qubit was driven in an ultrastrong fashion by an oscillatory microwave field, which was created by coupling via the nonlinear Josephson energy. The observed Stark shifts of the "atomic" levels are so pronounced that corrections even beyond the lowest-order Bloch-Siegert shift are needed to properly explain the measurements. The ...

A superconducting qubit was driven in an ultrastrong fashion by an oscillatory microwave field, which was created by coupling via the nonlinear Josephson energy. The observed Stark shifts of the �atomic� levels are so pronounced that corrections even beyond the lowest-order Bloch-Siegert shift are needed to properly explain the measurements. The ...

consisting of a linear analysis, a nonlinear analysis based on a phase plane .... extreme of the saw tooth. The command signal may be modified so that a ...... The ac servomotor is a two-phase induction motor. ...

Nonlinear Matroid Optimization and Experimental Design. Yael Berstein(yaelber ***at*** tx.technion.ac.il) Jon Lee(jonlee ***at*** us.ibm.com) ...

We derive a nonlinear fuel optimal attitude control system (ACS) that drives the final state to the desired state according to a cost function that weights the final state angular error relative to the angular rate error. Control is achieved by allowing t...

... 1 oI. ,ti f ,, AC rVI TV (o--o ... 'In particular, a non-linear ray theory for waves ... Theories describing the propagation of large-amplitude short pulses in ...

An analytical, nonlinear space charge wave theory is given for the velocity modulated, confined electron beam of finite radial extension. The present theory gives a more accurate nonlinear description of the electron velocities and the ac current amplitud...

General considerations in nonlinear least squares fitting of small-signal ac frequency response data (conductive or dielectric systems) are first discussed. A very general and flexible complex nonlinear least squares fitting (CNLS) program (LOMFP) is desc...

Nonlinear AC response of the semiconductor barrier semiconductor structures is considered. It is shown that in the vicinitv of the barrier a low frequency plasma excitations junction ptasma polaritons (JPPs) are excited on high frequencies. The excitation...

In this report an extension of the theory of acoustic non-linearities accurate to fourth order is derived. A new fundamental limitation on the high frequency operation of acousto-optic signal processing architectures is demonstrated. Signal processing, Ac...

In this paper we study the dynamics in the general case for a Tavis-Cummings atom in a nonuniform cavity. In addition to the dynamical Stark shift, the center-of-mass motion of the atom and the recoil effect are considered in both the weak and the strong cavity-atom coupling regimes. It is shown that the spatial motion of the atom inside the cavity in the resonant case leads ...

AC magnetic fields are applied at the shell of the Madison Symmetric Torus (MST), and these penetrate into the plasma. The applied poloidal and toroidal fields are used in oscillating field current drive (OFCD). The initial OFCD system should be capable of driving a portion of the total plasma toroidal current. In order to study the effects of AC field ...

We investigate the near infrared interband absorption of semiconductor quantum wells driven by intense terahertz (THz) radiation in the regime of ultrastrong coupling, where the Rabi frequency is a significant fraction of the frequency of the strongly driven transition. With the driving frequency tuned just below the lowest frequency transition between valence subbands, a particularly interesting ...

We present experimental results that show a significant yield of nP atoms after excitation of nS Rb Rydberg atoms from a MOT using a pulsed dye laser, where 27<=n<=39. Such results are naturally attributed to binary collisions. This cannot be the case here, because the interaction between Rb nS atoms is repulsive. In this experiment, the AC-Stark effect, dipole- dipole ...

The direct interaction of superintense laser fields in the optical frequency domain with nuclei is studied. As main observable, we consider the nuclear dynamic (AC) Stark shift of low-lying nuclear states due to the off-resonant excitation by the laser field. We include the case of accelerated nuclei to be able to control the frequency and the intensity of ...

The ``electromagnetic (e.m.) mirror'' for neutral atoms is based on the principle that, for near resonant blue shifted frequency, the a.c. Stark shift of an evanescent wave acts as an inhomogeneous potential repelling the atoms. We investigate the reflection of neon metastable atoms by a surface plasmon wave at the metal-vacuum interface which enhances the ...

and passive slow-light experiments reveal large ac Stark shifts, power broadening, and transit-time broadening be pressurized and can be evacuated [38]. Furthermore, significant linewidth broadening of the hot va- pors broadening mechanism. This effect is inherently connected to transit-time broadening in such systems

Anomalous photoelectron angular distributions are observed at certain wavelengths in strong-field ionization of H2. We relate this feature to ac Stark shifts from bound-bound transitions in the Rydberg manifold of principal quantum number n=3 and 4. A model of the multistate interaction supports this interpretation.

When pumping near the two-photon 3d resonance in pure sodium vapor and observing the backward hyper-Raman emission to the 3p substates, an asymmetry in ratios of 3p/sub 1/2/, 3p/sub 3/2/ associated emissions was observed, dependent upon the direction of t...

We argue that ultracold atoms in strongly shaken optical lattices can be subjected to conditions similar to those experienced by electrons in laser-irradiated crystalline solids, but without introducing secondary polarization effects. As a consequence, one can induce nonperturbative multiphoton-like resonances due to the mutual penetration of ac-Stark-shifted Bloch bands. ...

Faraday rotation based on ac Stark shifts is a mechanism that can entangle the polarization states of photons and atoms. We study the entanglement dynamics inside an optical cavity, and characterize the photon-atom entanglement by using the Schmidt decomposition method. The time dependence of entanglement entropy and the effective Schmidt number are ...

An AC dipole magnet produces a sinusoidally oscillating dipole field with frequency close to betatron frequency and excites large sustained oscillations of beam particles circulating in a synchrotron. Observation of such oscillations with beam position monitors allows direct measurements of a synchrotron's nonlinear parameters. This paper presents ...

and proteins. AC electroosmotic flow can be utilized to create micropumps for micro-bio- chips [1]. As a result electroosmotic micropumps. ICEO [4] refers to a phenomenon in which a DC or AC electric field induces charge electrokinetic micropumps: The effect of geometrical confinement, Faradaic current injection, and nonlinear

the generator angle and the DC power Pdc under the case 1 fault; and Figs. 6 and 7 show the system dynamic to be Pd dc � 0:4 in order to minimize the change of DC line power and to keep the pre-fault generatorA nonlinear robust HVDC control for a parallel AC/DC power system Hongzhi Cai a , Zhihua Qu b

The complex AC susceptibility ((chi)) of high T(sub c) superconducting materials has been described in terms of hysteretic and AC losses. By including both flux creep and flux flow resistivities in the expression of the flux diffusivity, induction profile...

Optimal Modulation Controllers for multiarea ac/dc systems are designed by a recursive algorithm that determines the state weighting matrix Q of a linear quadratic performance criterion. The basic feature of the proposed method is the reduction of the number of iterations as well as minimization of the calculations involved. This method is applied for eigenvalue assignment of ...

Optical transitions in a Lens-Shaped Quantum Dot (LSD) are investigated in the presence of a hydrogenic impurity. The electronic wave functions are obtained analytically and the energy eigenvalues are calculated numerically. The density matrix formulation with the intersubband relaxation are used to evaluate the (linear and third order nonlinear) absorption coefficient ...

Two-beam-coupling and degenerate-four-wave-mixing interactions are studied for the case of near-resonance excitation of a system of two-level atoms. First, a theoretical and experimental study is made of the gain and absorption experienced by a weak probe beam propagating through a sodium vapor in the presence of an intense pump field that is nearly resonant with the 3^2S _{1/2} to 3^2P_{3/2 } ...

converter after the micro-power- generators. The AC/DC converter is followed by an adaptive DC/DC converter generator is rectified using an AC/DC converter. Then a DC/DC converter is used to match the output of AC/DC-LINEAR TECHNIQUES FOR INCREASING HARVESTING ENERGY Power Generator AC/DC Converter DC/DC Converter ...

Circuit diagrams ard modulation curves are used to describe an a-c polarograph. There are means for modulating the amplitude or the frequency of the a-c component of the current flowing in the polarograph cell and the modulating waveform may be sinusoidal or square-wave. The po larograph also contains detector means for measuring currents ...

We obtained an analytical expression for the biexciton binding energy as a function of the inter-exciton distance and binding energy of constituent quasi-one-dimensional excitons in single-wall semiconducting carbon nanotubes. This allows one to trace biexciton energy variation and relevant non-linear absorption under external conditions whereby the exciton binding energy ...

One of the dominant systematic effects that shift resonance lines in high-precision measurements of two-photon transitions is the dynamic (ac) Stark shift. For suitable laser frequencies, the ac Stark shift acquires an imaginary part which corresponds to the rate of resonant one-photon ionization of electrons into ...

This report discusses the following topics: Dynamics of Multiphoton Excitation in Rydberg Atoms; Nonlinear Schrodinger Equation and Dissipative Quantum Dynamics in Periodic Fields; Density Matrix Formulation of Complex Geometric Phases in Dissipative Systems; and A. C. Stark Shifts of Excited States of Atoms in Strong Fields.

Conventional self-electrooptic effect device (SEED) is based on the so-called quantum-confined Stark effect (QCSE), which results in the red-shift of the effective bandgap. Thus, it has significant residual absorption and requires high operational voltage...

The characteristic peculiarities of the self-reflection of a strong electromagnetic wave in a system of coherent excitons and biexcitons due to the exciton-photon interaction and optical exciton-biexciton conversion in semiconductors were investigated as one of the manifestations of nonlinear optical Stark-effect. It was found that a monotonously ...

We calculate the dispersive properties of a single-sided cavity coupled to a single dipole. We show that when a field is resonant with the dipole and the Purcell factor exceeds the bare cavity reflection coefficient, the field experiences a {pi} phase shift relative to reflection from a bare cavity. We then show that optically Stark shifting the dipole resonance with a second ...

In typical epitaxial quantum dots (QDs) the ideally degenerate optical excitons are energy split, preventing the formation of two-photon entanglement in a biexciton decay. We use an external field, here a continuous-wave laser tuned to the QD in the ac Stark limit, to cancel the splitting and create two-photon entanglement. Quantum-state tomography is used ...

In the treatment of the nonlinear problem the effects of thermal conduction are neglected. These effects will generally be small except in the immediate vicinity of the conductor. Some solutions of the linear problem including thermal conduction are given from which it is possible to estimate the effect of thermal conduction in the nonlinear ...

This paper proposes a different type of HTS superconducting magnetometer based on the non-linear magnetic behavior of bulk HTS materials. The device design is based on the generation of second harmonics which arise as a result of non-linear magnetization observed in Type-II superconductors. Even harmonics are generated from the ...

... to as "radiofrequency Stark effect", 1. HK Hughes, Phys. ... were similar in form to the quadratic Stark effect due to the inter- action ...

... Descriptors : *BERYL, *SPECTROSCOPY, *STARK EFFECT, AUTOCORRELATION, AXES, COEFFICIENTS, DETECTION, ELECTRIC ...

... CONFINED STARK EFFECT ELECTRO- ... 5. FUNDING NUMBERS HETEROSTRUCTURE QUANTUM CONFINED STARK EFFECT ELECTRO- ...

Experimental and theoretical studies were conducted to investigate the control of charge and modification of nonlinear oscillations of externally injected dust particles in a dc discharge. The superposition of ac voltage on a dc cathode led to plasma density modulation, which brought about a drastic change of particle oscillation characteristics. Examples ...