Topology-optimized broadband surface relief transmission grating

Jacob Andkjær; Christian P. Ryder; Peter C. Nielsen; Thomas Rasmussen; Kristian Buchwald; Ole Sigmund

doi:10.1117/12.2036997

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7 March 2014 Topology-optimized broadband surface relief transmission grating

Jacob Andkjær, Christian P. Ryder, Peter C. Nielsen, Thomas Rasmussen, Kristian Buchwald, Ole Sigmund

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Proceedings Volume 8980, Physics and Simulation of Optoelectronic Devices XXII; 898006 (2014) https://doi.org/10.1117/12.2036997
Event: SPIE OPTO, 2014, San Francisco, California, United States

Abstract

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.

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Jacob Andkjær, Christian P. Ryder, Peter C. Nielsen, Thomas Rasmussen, Kristian Buchwald, and Ole Sigmund "Topology-optimized broadband surface relief transmission grating", Proc. SPIE 8980, Physics and Simulation of Optoelectronic Devices XXII, 898006 (7 March 2014); https://doi.org/10.1117/12.2036997

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