Genetically optimized All-dielectric metasurfaces
arXiv:1702.02331 · doi:10.1364/OE.25.002583
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.
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Cited by in corpus (8)
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- Computational inverse design for cascaded systems of metasurface optics
- Nanoscale polarization manipulation and encryption based on dielectric metasurfaces
- Freestanding dielectric nanohole array metasurface for mid-infrared wavelength applications
- Inverse design of optical elements based on arrays of dielectric spheres
- Three-dimensional angular deviation and diffraction efficiency of a grating in Littrow-configuration ECDL
- Design space reparameterization enforces hard geometric constraints in inverse-designed nanophotonic devices
- Designing high-transmission and wide angle all-dielectric flat metasurfaces at telecom wavelengths