Results 151 to 160 of about 63,853 (195)

Photonic band gaps in optical lattices

Physical Review A, 1995
We study photonic band gaps in a one-dimensional optical lattice of laser-cooled trapped atoms. We solve for the self-consistent equilibrium positions of the atoms, accounting for the backaction of the atoms on the trapping beams. This solution depends strongly on the sign of the trapping laser detuning.
, Deutsch, , Spreeuw, , Rolston, , Phillips   +3 more
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Photonic band-gap crystals

Journal of Physics: Condensed Matter, 1993
The analogy between electromagnetic wave propagation in multidimensionally periodic structures and electron wave propagation in real crystals has proven to be a very fruitful one. Initial efforts were motivated by the prospect of a photonic band gap, a frequency band in three-dimensional dielectric structures in which electromagnetic waves are ...
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Highly dispersive photonic band-gap prism

Optics Letters, 1996
We propose the concept of a photonic band-gap (PBG) prism based on two-dimensional PBG structures and realize it in the millimeter-wave spectral regime. We recognize the highly nonlinear dispersion of PBG materials near Brillouin zone edges and utilize the dispersion to achieve strong prism action.
S Y, Lin, V M, Hietala, L, Wang, E D, Jones   +3 more
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Photonic band gaps in anisotropic photonic crystals

Physica B: Condensed Matter, 2000
Photonic band gaps can be improved in photonic crystals fabricated from anisotropic materials. In three-dimensional photonic crystals, the anisotropy can open partial band gaps in simple lattices such as face-centered-cubic, body-centered-cubic, and simple-cubic lattices of dielectric spheres in air, where no absolute band gap exists.
Li, ZY, Lin, LL, Gu, BY, Yang, GZ
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Photonic Band Gaps in Metamaterials

Frontiers in Optics 2013, 2013
We investigate the photonic band gap spectra (bulk and surface modes) from plasmon-polaritons excitations in a multilayer structure where one of the constituents is a metamaterial, the other being a material with positive refraction index.
U. L. Fulco, E. L. Albuquerque, L. R. da Silva   +2 more
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Tunable photonic band gap fiber

Optical Fiber Communication Conference and Exhibit, 2002
The ability to change the photonic band gap structure continuously and reversibly by modifying the index thermally allows the band gap features to be sensitively tuned, allowing for a thorough investigation of the various band gap guiding properties. Furthermore, it may be possible to use this type of band gap fiber as a tunable filter.
R.T. Bise, R.S. Windeler, K.S. Kranz, C. Kerbage, B.J. Eggleton, D.J. Trevor   +5 more
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Photonic band gaps and holography

Journal of Applied Physics, 1997
Photonic band gap materials are holograms with extremely high refractive index contrasts. The refractive index function can be approximated by a small number of plane waves, as a consequence of the photonic crystal periodicity. Photonic crystals can hence be constructed with a simple holographic recording of a very small number of optical plane waves ...
V. Berger, O. Gauthier-Lafaye, E. Costard   +2 more
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APPLICATIONS OF PHOTONIC BAND GAP STRUCTURES

Optics and Photonics News, 1992
Imagine a material that would exclude all electromagnetic radiation in 4π steradians over a range of frequencies. The center frequency of the exclusion gap could be determined by the experimenter to be anywhere from the optical to the microwave region. The width of the gap would be large, at least 20% of the center frequency. Radiation outside that gap
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Leveraging deep photonic band gaps in photonic crystal impurity bands

Applied Physics Letters, 2001
Photonic band gaps can be generated in the impurity bands of photonic crystals formed by periodically placed defects. Even slight periodic modulation of the properties of these defects can open up very deep band gaps in the impurity bands. This phenomenon originates from the concentration of electromagnetic field at the defect regions, making ...
Sheng Lan, Satoshi Nishikawa, Osamu Wada
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Photonic Band Gap Structures for Terahertz Photonics

Integrated Photonics Research, 2001
The generation and control of terahertz (THz) waves is attracting a lot of interest due to its potential applications in many fields. In this talk we present the control of THz waves using Photonic Band Gap devices.
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