Results 331 to 340 of about 583,984 (377)
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Reflectivity of the quantum grating and the grating polariton
Physical Review B, 1995We solve the problem of the scattering of an electromagnetic plane wave from a planar array of equispaced cylindrical scatterers with strong resonances. We apply this theory to calculate the reflectivity of an array of quantum wires using the electromagnetic properties of the single wire as the only input.
Francesco Tassone, Franco Bassani
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Displacement measuring grating interferometer: a review
Frontiers of Information Technology & Electronic Engineering, 2019A grating interferometer, called the “optical encoder,” is a commonly used tool for precise displacement measurements. In contrast to a laser interferometer, a grating interferometer is insensitive to the air refractive index and can be easily applied to
P. Hu +5 more
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Novel immersion grating, VPH grating and quasi-Bragg grating
SPIE Proceedings, 2006We have successfully fabricated germanium immersion gratings with resolving power of 45,000 at 10 μm by using a nano precision 3D grinding machine and ELID (ELectrolytic In-process Dressing) method. However the method spends large amount of machine times.
Akiko Yamada +18 more
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Mechanisms of Grating Formation and Grating Materials [PDF]
, 1986 In the following section, different mechanisms of light-induced changes of optical material properties are described. Often these changes are considered to be due to some specific material excitation (e.g., electron density, temperature). This is, however, a simplified description.
Peter Günter +2 more
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Grating interferometers for producing large holographic gratings
Applied Optics, 1990Methods for producing large holographic diffraction gratings are described. In particular, the advantages of using a grating interferometer illuminated with a noncollimated beam from either an extended monochromatic source or an extended polychromatic source are described along with some of the problems that arise and methods to solve them ...
Robert R. Hershey, Emmett N. Leith
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AJN, American Journal of Nursing, 2022
A nurse remembers Dr. Fauci's impact during the early days of the AIDS crisis.
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A nurse remembers Dr. Fauci's impact during the early days of the AIDS crisis.
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Applied Optics, 1995
A grating-pair device is useful for producing negative group velocity dispersion of temporal optical signals. When high dispersion is needed or large bandwidth is involved, higher-order dispersion terms become significant. The grating triplet is a new approach to create dispersion that can produce negative or positive group-velocity dispersion without ...
D, Mendlovic, O, Melamed
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A grating-pair device is useful for producing negative group velocity dispersion of temporal optical signals. When high dispersion is needed or large bandwidth is involved, higher-order dispersion terms become significant. The grating triplet is a new approach to create dispersion that can produce negative or positive group-velocity dispersion without ...
D, Mendlovic, O, Melamed
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Birefringence Bragg Binary (3B) grating, quasi-Bragg grating and immersion gratings
SPIE Proceedings, 2014A volume phase holographic (VPH) grating achieves high angular dispersion and very high diffraction efficiency for the first diffraction order and for S or P polarization. However the VPH grating could not achieve high diffraction efficiency for non-polarized light at a large diffraction angle because properties of diffraction efficiencies for S and ...
Yasuhiro Hirahara +8 more
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AIP Conference Proceedings, 1982
I show that laser grating accelerators may encounter serious difficulties in operating near or even below the damage threshold caused by the formation of a dense plasma above the grating, which obscures the grating shape.
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I show that laser grating accelerators may encounter serious difficulties in operating near or even below the damage threshold caused by the formation of a dense plasma above the grating, which obscures the grating shape.
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Physical Review Letters, 2004
We propose a method of optical waveguiding, which relies on Bragg diffractions from a 1D grating that gives rise to waveguiding in the direction normal to the grating wave vector. The waveguide structure consists of a shallow 1D grating that has a bell- or trough-shaped amplitude in the confinement direction.
Mordechai Segev +5 more
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We propose a method of optical waveguiding, which relies on Bragg diffractions from a 1D grating that gives rise to waveguiding in the direction normal to the grating wave vector. The waveguide structure consists of a shallow 1D grating that has a bell- or trough-shaped amplitude in the confinement direction.
Mordechai Segev +5 more
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