We observed modulated oscillations in lasers of up to 130 GHz by conducting frequency domain measurements on photonic crystal lasers with built- in saturable absorbers. This is an example of how the small volumes of photonic crystal lasers lead to increas...

A coated surface of a crystal is irradiated by intense infrared light. The optically active atomic bonds absorb photons from the laser field, and the subsequent spontaneous decay goes together with emissions of phonons into the crystal. This photon phonon...

We utilize photonic crystals to simulate enhanced light-trapping in a-Si:H thin film solar cells. A one dimensional photonic crystal or distributed Bragg reflector with alternating dielectric layers acts as low loss backreflector. A two dimensional photonic crystal between ...

Glancing angle deposition (GLAD) facilitates the fabrication of nanostructured thin films with varying density, using a motion control algorithm governing substrate movements during film growth, which engineerings the film structure. Film architectures for specific optical applications including photonic crystals are easily produced with GLAD. A challenge ...

We report on the absorption of a 100nm thick hydrogenated amorphous silicon layer patterned as a planar photonic crystal (PPC), using laser holography and reactive ion etching. Compared to an unpatterned layer, electromagnetic simulation and optical measurements both show a 50% increase of the absorption over the 0.38-0.75micron spectral range, in the case ...

Monodisperse and symmetrically shaped colloidal particles tend to form ordered aggregates. When the particle size is in the hundreds of nanometres, such highly ordered structures exhibit fascinating optical properties, hence their name and fame as colloidal "photonic crystals" or as "photonic bandgap material", because they exhibit a ...

The analytical results and design considerations for a novel cryogenically cooled Advanced Photon Source (APS) monochromator are presented. Because the monochromator uses silicon crystal, cryogenic cooling enables one to take advantage of the high conductivity and low thermal expansion coefficient of silicon at cryogenic temperatures. The APS monochromator ...

... 1. Title: Design and fabrication of robust photonic crystals ... The photonic crystal structure, that is robust for the structural fluctuation caused by the ...

materials that allow precise control of all electromagnetic wave properties [4�6]. A PBG occurs of the emitted and absorbed electromagnetic radiation can be illustrated considering a photonic crystal coating the frequency and the wave-vector) and the photonic density of states (the number of available ...

Cosmic photons were detected using a large NaI (Tl) crystal total absorption spectrometer (S. Standil, et. al., Can. J. Phys. 39, 229(1961); 40, 348(1962)). A 100-channel analyzer was used to obtain the differential spectrum of the totally absorbed photons. Data are represented in graphical and tabular ...

Electrical operation of III-Nitride light emitting diodes (LEDs) with photonic crystal structures is demonstrated. Employing photonic crystal structures in III-Nitride LEDs is a method to increase light extraction efficiency and directionality. The photonic crystal is a ...