Design of Silicon-Based Leaky-Mode Resonant Nanopatterned Devices Using Inverse Numerical Methods

摘要

The objective of this research is design of nanophotonic resonance devices including filters, mirrors, and polarizers with minimal materials requirements. Thus, single layer, silicon based, two dimensional resonant leaky mode elements implemented with periodic waveguide layers are presented. We apply particle swarm optimization to design these devices. Example results include a broadband reflector with center wavelength of 1700 nm and bandwidth of ~161 nm across which the zero order reflectance exceeds 99%. An efficient bandpass filter with spectral width of ~2 nm at 1550 nm central wavelength is realized. The versatility of the leaky mode resonance concept is rendered clearly as these single layer devices consist of identical materials yet provide completely different spectral expressions. Particle swarm optimization is thus effective for this class of problems and straightforward in implementation.