Web5 May 2024 · The subwavelength grating effectively behaves as a homogeneous, diffraction-less waveguide. As with prism-film couplers, [ 38, 39] radiation can be enabled in the zeroth ( m = 0) order by placing a high-refractive-index ( nu > nB) material on top of the grating, so that Equation ( 1) becomes = θ = ˙ sin − 1 ( n B n u) (2) Web11 Nov 2010 · 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. Published in: 2010 23rd Annual Meeting of the IEEE Photonics Society Article #:
Tilted subwavelength gratings: controlling anisotropy in …
Web29 Aug 2024 · A GaAs/AlOx high index contrast subwavelength grating with TE polarization is presented for the GaAs-based vertical cavity surface emitting laser (VCSEL). The rigorous coupled wave analysis (RCWA) method is employed to simulate the dependence between its reflection characteristics and grating parameters. Especially, the effects of the stress … Web17 Feb 2015 · We show that the energy-momentum dispersion of a vertical semiconductor microcavity can be modified by design using a high-index-contrast subwavelength grating … skincare school podcast
High-efficiency broad-bandwidth sub-wavelength grating based …
Web15 Feb 2024 · In the past decade, there has been tremendous progress in using subwavelength-scale nanostructures with elaborately designed periodic and disordered … Web1 Jul 2002 · Space-variant Pancharatnam-Berry phase optical elements based on computer-generated subwavelength gratings are presented. By continuously controlling the local orientation and period of the grating we can achieve any desired phase element. We present a theoretical analysis and experimentally demonst … Web13 Sep 2010 · Subwavelength grating waveguides in silicon-on-insulator are fabricated with a single etch step and allow for flexible control of the effective refractive index of the … swampscott post office phone number