... 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 ...

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 ...

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 ...

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 ...

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 ...

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

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

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...

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

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 ...

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 ...

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 ...

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 ...

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 ...

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 ...

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 ...

... Accession Number : AD0415790. Title : STARK EFFECT AND HYPERFINE STRUCTURE OF HYDROGEN FLUORIDE,. ...

... Title : CALCULATION OF THE STARK EFFECT AND THE DIPOLE MOMENTS OF THE HYDROGEN ATOM USING THE PERTURBATION THEORY. ...

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 ...

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 ...

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 ...

Therefore, we have studied the Stark effect in some detail ... a reduced laser power level, shows a spectrum where the Stark effect is negligible. ...

ground state (the Stark effect) involves only the two lowest opposite parity .... in the Stark effect as the electric field increases. One may reasonably ...

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 ...

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 ...

... Accession Number : ADA002768. Title : The Linear Stark Effect in Ruby,. Corporate Author : DEFENCE RESEARCH ESTABLISHMENT ...

... Becauise of the small dipole moment, the Stark effect could not be employed to identify transitions. ... The Stark effect of the 1 - 2 transi- ...

... Accession Number : AD0611598. Title : THE ANOMALOUS STARK EFFECT OF FLUOROFORM IN THE NU6=1 VIBRATIONAL STATE,. ...

... Title : STARK EFFECTS ON THE QUADRUPOLE COUPLING OF CL(35) IN SODIUM CHLORATE. ... Report Date : 21 JAN 1964. ...

... Accession Number : AD0269583. Title : STARK EFFECTS IN THE NEAR INFRARED SPECTRA OF SIMPLE POLYATOMIC MOLECULES. ...

... Accession Number : ADA428899. Title : Infrared Stark Effect Spectroscopy for Interface Characterization. Descriptive Note : Final rept. ...

Using the method employed to solve the anharmonic oscillator, the Stark effect for a hydrogen atom is calculated.

... Accession Number : ADD010882. Title : Distributed Feedback Laser Employing the Stark Effect. Descriptive Note : Patent,. ...

... Accession Number : AD0159127. Title : A STARK-EFFECT, RESONANT CAVITY MICROWAVE SPECTROGRAPH. Corporate ...

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 ...

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. ...

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 ...

... The polarization dependence of the Stark effect was exploited to determined the field direction as well as magnitude (electronic field vector). ...

... atoms are perturbed by the microelectric fields of the ions and electrons, so that the emitted spectral lines are broadened by the Stark effect. ...

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 ...

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.

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 ...

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 ...

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 ...

A theoretical framework for describing high intensity multilevel rotational Raman scattering is presented. The formalism, which employs the multipole form of the density matrix equations, is valid at low as well as high intensities, in transient and steady state regimes and, allows for coupling of arbitrary polarizations of the various Stokes/anti-Stokes fields. Several examples are discussed to ...

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 ...

Stark Effect on Single Molecules of Dibenzanthanthrene in a Naphthalene Crystal and in a n on centrosymmetric dibenzanthanthrene molecules in naphthalene, a centrosymmetric crystal, where it is mainly Stark effect measurements on single molecules of dibenzanthanthrene (DBATT) in naphthalene crystals20

Although the q profile plays a key role in theories of instabilities and plasma equilibrium, it has been quite difficult to measure until the recent development of the motional Stark effect (MSE) diagnostic. A multichannel motional Stark effect polarimete...

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 ...

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 ...

ing the quantumconfiined Stark effect in conjunction with selective doping; .... Stark effect in the embodiment described above is when ...

... Descriptors : *PLASMAS(PHYSICS), *ALUMINUM, *STARK EFFECT, NUMERICAL ANALYSIS, DOPPLER EFFECT, LINE SPECTRA. ...

... Ion effects are calculated in the quasistatic, linear Stark-effect approximation, using distribution functions of Hooper and Tighe which include ...

... Accession Number : ADP008291. Title : Stark Effect on Persistent Spectral Holes Measured by Electric Field Modulation Technique,. ...

... Accession Number : AD0725067. Title : Stark Effect Modulation Studies. Descriptive Note : Final rept. 18 Mar 68-31 Dec 70,. ...

... Accession Number : AD0231493. Title : STARK EFFECT AND DIPOLE MOMENTS OF CH3CHF2. Corporate Author : HARVARD ...

... controlling stark effect (QCSE)[ 1 ], The exciton absorption peak ... Using the quantum controlling stark effect, it is possible to manufacture a series of ...

... Accession Number : ADP008244. Title : Photochemical Hole Burning Stark Effect Studies on Octatetrane n-Alkane Mixed Crystals,. ...

A large optical Stark effect has been observed in the two-photon spectrum X(2)Pi yields A(2)Sigma(+)

... 4. TITLE AND SUBTITLE Infrared Stark Effect Spectroscopy for Interface Characterization 5. FUNDING NUMBERS ARO Proposal No.: 40036-MS ...

... Accession Number : ADA279342. Title : Heterostructure Quantum Confined Stark Effect Electrooptic Modulators Operating at 938 nm. ...

... Accession Number : ADA097794. Title : Collisional Contributions to the Dynamic Stark Effect in Coherently Driven Three-Level Systems,. ...

In this paper, the authors report the density matrix treatment of the Stark effect on fluorescence spectra and dynamics of isolated excited molecules. They also present some experimental results on the Stark level crossing spectroscopy of formaldehyde. Some numerical calculations are carried out to demonstrate the theoretical results.

The evolution of the field entropy in the two-photon JCM in the presence of the Stark shift is investigated, and the effects of the dynamic Stark shift on the evolution of the field entropy and entanglement between the atom and field, are examined. The re...

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 ...

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 ^[1]. Simultaneously, we also study the orientation dependent high harmonic generation (HHG) and ...

... ELSE */ /* calc stark effect and add to upper and lower */ /* ENDIF */ /* read in line from .str */ /* END DO */ /* STATE = -1 (initialize first line) ...

Aug 15, 1994 ... the SADOF center frequency using the Stark effect are investigated, and the calculation results for the. SADOF operating at the doubled ...

In this work, we study the role of the ac Stark effects on the excitation of nS{sub 1/2} cold Rydberg atoms produced in a rubidium magneto-optical trap. We have observed an atomic population in the nP{sub 3/2} state after excitation of nS{sub 1/2} for 29{<=}n{<=}37. Such an observation is normally attributed to binary ...

We demonstrate single-qubit operations on a trapped atom hyperfine qubit using a single ultrafast pulse from a mode-locked laser. We shape the pulse from the laser and perform a ? rotation of the qubit in less than 50 ps with a population transfer exceeding 99% and negligible effects from spontaneous emission or ac Stark shifts. The ...

The dc field Stark effect is studied theoretically for atoms in high intensity laser fields. We prove that the first-order perturbation corrections for the energy and photoionization rate vanish when the dc field strength serves as a perturbational strength parameter. Our calculations show that by applying a dc field in the same direction as the ...

We describe the observation of narrow peaks superimposed on saturation-broadened line profiles in Doppler-free spectra of Th. The peaks were observed using counterpropagating laser beams and resonance ionization mass spectroscopy (RIMS). At low laser powers a conventional Lamb dip was observed, while at higher laser powers the dip was obscured by a narrow peak. The narrow peak is attributed to a ...

We describe the observation of narrow peaks superimposed on saturation-broadened line profiles in Doppler-free spectra of Th. The peaks were observed using counterpropagating laser beams and resonance ionization mass spectroscopy (RIMS). At low laser powers a conventional Lamb dip was observed, while at higher laser powers the dip was obscured by a narrow peak. The narrow peak is attributed to a ...

By using spontaneous Raman processes in the high-gain regime, we create instantaneous coherence between two independent atomic ensembles. The coherence is confirmed by the observation of temporal beating between the two subsequent readout fields converted from the atomic excitations through another enhanced Raman process. The beat frequency is found to be a result of an AC ...

It is possible to manipulate electronic energy-transfer collision cross sections between different atomic species by using a strong electromagnetic field close to resonance with a transition between two excited states to modify the energy levels (i.e., to create dressed states), which may be placed in or out of resonance with populated states (forming a population reservoir) in one of the species. ...

Spectroscopic temperature determinations have been made on a thermal plasma generated by a fluid-stabilized arc. The electrodes of the arc were a rod anode and a plate cathode with the electrically neutral plasma being discharged through an orifice in the cathode. The arc was confined by means of a rotating water column, thus lncreasing the current density and hence the plasma ...

This paper describes a theoretical investigation of the effect of near-resonant amplitude-modulated optical field on the parametric resonances and quasi-level structure of an atom. Analytical solutions derived for the density-matrix equations of motion for the case of two-level and three-level atoms are used for analysis of the quasi-level shifts. Mathematical models are ...

The dynamic Stark effect is the quasistatic shift in energy levels due to the application of optical fields. The effect is in many ways similar to the static Stark effect. However, the dynamic Stark effect can be applied on rapid time scales and with ...

... Title : REMARKS ON THE QUANTUM MECHANICAL INTERPRETATION OF THE STARK EFFECT IN THE HYDROGEN ATOM. ...

... EXCITATION, KERR CELLS, MOLECULAR ROTATION, DIELECTRICS, ELECTRON BEAMS, MASS ENERGY RELATION, STARK EFFECT, ...

... PHENYL RADICALS, ABSORPTION, ABSORPTION SPECTRA, AMPLITUDE ... SIGNALS, STARK EFFECT, TEMPERATURE, ULTRASONICS ...

... MICROWAVE SPECTROSCOPY, *WATER VAPOR), ROTATION, HYPERFINE STRUCTURE, STARK EFFECT, QUADRUPOLE MOMENT ...

... high resolution spectra. The measurements of the Stark effect on the benzophenone crystal were completed. A Study of ...

Language: English ...

Language: English ...

... Title : CENTRIFUGAL STRETCHING IN SYMMETRIC-TOP MOLECULES AND THE STARK EFFECT OF CHLOROTRIFLUOROMETHANE. ...

... Pagination or Media Count : 6. Descriptors : *QUANTUM THEORY, *CHAOS, SPECTROSCOPY, LITHIUM, STARK EFFECT. ...

... PULSED LASERS, SEMICONDUCTORS, LASERS, PHOTONS, MOLECULAR ROTATION, ABSORPTION, STARK EFFECT, CARBON DIOXIDE ...