Effective medium theory grating
WebFeb 1, 1997 · Effective-medium theory is often helpful for understanding the behavior of subwavelength gratings with small period-to-wavelength ratios. By analytically solving … WebOct 24, 2024 · Effective medium approaches such as Maxwell-Garnett and Bruggemann theories, which are conventionally used for modeling the optical properties of nanocomposites, have limitations in terms of the shapes, volume fill fractions, sizes, and types of the nanoentities embedded in the host medium. We demonstrate that grating …
Effective medium theory grating
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WebMay 15, 2010 · According to the measurement results, we found that the effective index of the grating region of the 2D grating could be predicted by simulation results for the 1D grating, when fill factor of shallow etched holes is larger than 0.5. This was explained by the effective medium theory and verified by 3D FDTD simulation. WebSep 1, 2011 · The effective medium theory (EMT) description of metal-dielectric lamellar gratings under transverse magnetic polarization is studied by the exact mode analysis …
Web2. Effective medium model In this section, we propose the effective medium theory for one-dimensional metallic gratings covered by a graphene sheet. The schematic of the … WebApr 14, 2024 · In grating-based antenna areas, there are 16 parallel waveguides (380 nm × 220 nm), and the spacing between adjacent waveguides is 1.62 μm, the grating period is 800 nm, the duty ratio is 0.5 ...
WebThe waveguide grating coupler on the silicon-on-insulator (SOI) platform is based on a subwavelength structure which was optimized using the genetic optimization approach with 2-dimensional finite-difference time-domain (2-D FDTD) simulations combined with the second - order effective medium theory (EMT). WebEffective medium theory of two-dimensional subwavelength gratings in the non-quasi-static limit Kikuta, Hisao; Ohira, Yasushi; Kubo, Hayao; Iwata, Koichi; Abstract. …
Web2. Effective medium model In this section, we propose the effective medium theory for one-dimensional metallic gratings covered by a graphene sheet. The schematic of the structure is shown in figure 1. The one dimensional grating is periodic with period d in x-direc-tion. Note that the structure is extended to infinity in the y-direction.
WebSep 1, 2011 · In this practical case, the effective medium theory becomes applicable. This work is expected to clarify the recognitions about whether a sub-wavelength metal … shands elementaryWebJul 20, 2024 · Uniform effective-medium-clad waveguide Bragg grating filter. (a) Top view. (b) A regular effective-medium-clad waveguide with a core width w S = 225 µm and length l S = 500 µm. (c) The hexagonal lattice of the effective medium cladding for the regular waveguide with a lattice period a S = 100 µm and hole diameter d S = 90 µm. shands east towerWebOct 24, 2024 · single effective-medium theory which can be applied for samples with very low (a few percent) to very high ( ≥ 50%) filling of air pores [ 25 ]. As a case study , we first take an example of a ... shands ectWebApr 10, 2024 · where n 1, n 2, and n eff are the mode effective indexes of upper and lower waveguides and coupled chirped Bragg grating waveguide composed of the upper and lower waveguides; λ c is the central wavelength reflected by the chirped Bragg gratings; a and \(n_{{\text{eff}_{{0}}}} \) are constants; x is the location along the waveguide; l is the … shands elementary schoolWebApr 4, 2008 · Three types of subwavelength-structured grating for efficient beam deflection in the non-paraxial domain are considered. The first-order efficiency is optimized by first designing an index-modulated grating and then encoding the optimized values of refractive index in the form of surface-relief profiles using effective-medium theory. shands dermatology clinichttp://ee.sharif.edu/~khavasi/index_files/29.pdf shands ear nose and throatWebPerson as author : Pontier, L. In : Methodology of plant eco-physiology: proceedings of the Montpellier Symposium, p. 77-82, illus. Language : French Year of publication : 1965. book part. METHODOLOGY OF PLANT ECO-PHYSIOLOGY Proceedings of the Montpellier Symposium Edited by F. E. ECKARDT MÉTHODOLOGIE DE L'ÉCO- PHYSIOLOGIE … shands elementary school supply list