Genetically optimized all-dielectric metasurfaces

Victor Egorov, Michal Eitan, Jacob Scheuer

Research output: Contribution to journalArticlepeer-review

Abstract

We present and study theoretically a new design approach for obtaining wide angle, highly efficient, all-dielectric metasurfaces. As a concrete example we focus on optimizing flat beam deflector for both the infra-red and visible spectral regions. Transmission efficiencies of up to 87.2% are obtained theoretically for deflection angle of 65° in visible (580nm) spectrum and up to 82% for deflection angle of 30.5° at telecom wavelength (1550nm). The enhanced efficiencies at wide deflection angles are obtained by genetic optimization of the nano-structures comprising the metasurface. Compared to previously employed design approaches, our approach enhances the transmission efficiency substantially without sacrificing rectangular grid arrangement and facilitates the realization of wide angle flat deflectors and holograms/lenses.

Original languageEnglish
Pages (from-to)2583-2593
Number of pages11
JournalOptics Express
Volume25
Issue number3
DOIs
StatePublished - 6 Feb 2017

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