Topology-optimized broadband surface relief transmission grating

Autor:	Kristian Buchwald, Thomas Rasmussen, Peter Caroe Nielsen, Christian P. Ryder, Ole Sigmund, Jacob Andkjær
Rok vydání:	2014
Předmět:	Diffraction Materials science business.industry Physics::Optics Acousto-optics Grating Fraunhofer diffraction Diffraction efficiency law.invention Ultrasonic grating symbols.namesake Optics law Blazed grating symbols Optoelectronics business Diffraction grating
Zdroj:	SPIE Proceedings.
ISSN:	0277-786X
DOI:	10.1117/12.2036997
Popis:	We propose a design methodology for systematic design of surface relief transmission gratings with optimized diffraction efficiency. The methodology is based on a gradient-based topology optimization formulation along with 2D frequency domain finite element simulations for TE and TM polarized plane waves. The goal of the optimization is to find a grating design that maximizes diffraction efficiency for the -1 st transmission order when illuminated by unpolarized plane waves. Results indicate that a surface relief transmission grating can be designed with a diffraction efficiency of more than 40% in a broadband range going from the ultraviolet region, through the visible region and into the near-infrared region.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::3a9bdd85efaf86461e184cb7a4cca52d https://doi.org/10.1117/12.2036997 Zobrazit plný text záznamu