Results 221 to 230 of about 71,451 (265)
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Guided-mode resonant wave plates
Optics Letters, 2010We introduce half-wave and quarter-wave retarders based on the dispersion properties of guided-mode resonance elements. We design the wave plates using numerical electromagnetic models joined with the particle swarm optimization method. The wave plates operate in reflection. We provide computed results for reflectance and phase in the telecommunication
Robert, Magnusson +2 more
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Guided-mode resonance Brewster filter
Optics Letters, 1998A new type of optical filter is predicted theoretically and verified experimentally. The filter operates under guided-mode resonance conditions in a thin-film waveguide grating. A high-efficiency reflection filter response is produced at the Brewster angle at which TM reflection is classically prohibited. Low-reflectance sidebands are obtained that are
R, Magnusson, D, Shin, Z S, Liu
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Nonlinear Theory: Guided-Mode Analysis
2018The self-consistent nonlinear theory of the free-electron laser describes the interaction through the linear regime and includes the saturation of the growth mechanism. Saturation can occur through a variety of mechanisms. For an ideal beam that is both monoenergetic and vanishing pitch-angle spread, saturation occurs by means of electron trapping in ...
Henry P. Freund, T. M. Antonsen,
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Espaces Temps, 1986
Les guides, c'est bien utile pour découvrir un lieu inconnu. Quand il s'agit de Paris, le jeu de piste devient un jeu de société, Alors pour en savoir plus sur les sociétés urbaines, n'oubliez pas les guides...
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Les guides, c'est bien utile pour découvrir un lieu inconnu. Quand il s'agit de Paris, le jeu de piste devient un jeu de société, Alors pour en savoir plus sur les sociétés urbaines, n'oubliez pas les guides...
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Wave-Guide Modes in Retinal Receptors
Science, 1961Retinal receptor wave-guide modal patterns have been photographed. The inner and outer segments of the rod and cone receptors of albino rats, rhesus macaque monkeys, and human beings have been studied. The wave-guide modal pattern is believed to be the normal form of energy transfer in these parts of the retinal receptors in these species.
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Modes in Wave Guides Containing Ferrites
Journal of Applied Physics, 1953When a static magnetic field is applied in the longitudinal direction to a wave guide containing a ferrite material, the medium within the guide becomes anisotropic. It has been shown by Polder that when a microwave field is propagating within such a medium, the relation between the components of B and H is given by: Bx=μHx−jμ′Hy,By=jμ′Hx+μHy,Bz=Hz ...
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Guided modes in slab chirowaveguides
Proceedings of IEEE. AFRICON '96, 2002A rigorous analysis of guided modes in chirowaveguides is presented. The numerical examples clarify that not only surface waves but also leaky waves exist owing to the chirality of the medium.
K. Rokushima +3 more
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Journal of the Optical Society of America B, 2011
With the various forms of constitutive relations for chiral media integratedly considered, the modal theory is developed for chiral fibers where both the core and cladding are dielectrically chiral. The important role of the wave impedance in the analysis of chiral fibers is pointed out.
Yusheng Cao, Junqing Li, Qiyao Su
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With the various forms of constitutive relations for chiral media integratedly considered, the modal theory is developed for chiral fibers where both the core and cladding are dielectrically chiral. The important role of the wave impedance in the analysis of chiral fibers is pointed out.
Yusheng Cao, Junqing Li, Qiyao Su
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Amplification of Slab-guided Modes
Optica Acta: International Journal of Optics, 1984The amplification of a TE-polarized, guided electromagnetic wave by the inversion depletion of externally pumped dopants has been investigated theoretically. The dopants are approximated by two-level systems distributed in the homogeneous superstrate region of a linear monomode slab guide.
U. Langbein, F. Lederer, H.-E. Ponath
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Applied Physics Letters, 2006
For the case of hexagonal ZnO waveguides the Helmholtz equation is solved numerically taking into account the anisotropy of both index of refraction and gain, as well as the material dispersion. The intensity distribution of all waveguide modes, their energy dependence, and the confinement as a function of the nanorod diameter are discussed.
Robert Hauschild, Heinz Kalt
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For the case of hexagonal ZnO waveguides the Helmholtz equation is solved numerically taking into account the anisotropy of both index of refraction and gain, as well as the material dispersion. The intensity distribution of all waveguide modes, their energy dependence, and the confinement as a function of the nanorod diameter are discussed.
Robert Hauschild, Heinz Kalt
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