Topic
Diffraction grating
About: Diffraction grating is a research topic. Over the lifetime, 24884 publications have been published within this topic receiving 372437 citations. The topic is also known as: grating.
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TL;DR: In this article, the theory of diffraction by dielectric gratings is extended to cover E-mode polarization and losses, and it is shown that direct coupling exists between all diffracted orders rather than just between adjacent orders.
Abstract: Rigorous coupled-wave theory of diffraction by dielectric gratings is extended to cover E-mode polarization and losses. Unlike in the H-mode-polarization case, it is shown that, in the E-mode case, direct coupling exists between all diffracted orders rather than just between adjacent orders.
227 citations
Patent•
27 Jul 1998TL;DR: A diffractive optical element includes a plurality of laminated diffraction grating surfaces as discussed by the authors, each of which is formed to have a sufficiently small grating thickness as compared with a grating pitch thereof.
Abstract: A diffractive optical element includes a plurality of laminated diffraction grating surfaces. Each of the diffraction grating surfaces is formed to have a sufficiently small grating thickness as compared with a grating pitch thereof.
227 citations
TL;DR: Theoretical analysis of second-harmonic generation (SHG) phase matched with gratings in a channel waveguide is presented in this article from the viewpoint of device design.
Abstract: Theoretical analysis of second-harmonic generation (SHG) phase matched with gratings in a channel waveguide is presented from the viewpoint of device design. The analysis includes cases where efficiency is high and residual phase mismatch is involved. Nonlinear couples mode equations, with general expressions for effective SHG coefficients and coupling coefficients, are derived, solved, and discussed for uniform and chirped gratings. It was found that very high efficiency with broadened phase matching bandwidth can be simultaneously obtained with chirped gratings. The results are summarized in graphic data with normalized parameters, and guidelines and criterion for optimum design are given. >
225 citations
TL;DR: In this article, the design and performance of a new type of high-efficiency diffraction grating for use in either transmission or reflection are described, which is produced in a multilayer dielectric coating deposited upon optically flat substrates.
Abstract: The design and performance of a new type of high-efficiency diffraction grating for use in either transmission or reflection are described. The gratings are produced in a multilayer dielectric coating deposited upon optically flat substrates. By proper design of the multilayer stack and grating structure, a diffraction efficiency in excess of 96% for polarized light in the m = -1 order in reflection has been achieved.
225 citations
TL;DR: In this paper, a new concept of dielectric subwavelength grating leveraging high index contrast to manipulate light to achieve ultra broad band reflector, high-Q resonator, planar high numerical aperture lens and reflector was discussed.
Abstract: We discuss a new concept of dielectric subwavelength grating leveraging high index contrast to manipulate light to achieve ultra broad band reflector, high-Q resonator, planar high numerical aperture lens and reflector, and hollow-core integrated optics.
225 citations