Sub-wavelength grating components for integrated optics applications on SOI chips.

摘要: In this paper we demonstrate silicon on insulator (SOI) sub-wavelength grating (SWG) optical components for integrated optics and sensing. Light propagation in SWG devices is studied realized with no cladding top of the waveguide. particular, focused bends, tapers directional couplers, all compatible geometries order to be used as building blocks more complex (interferometers, switches, resonators, etc.). Fabricated TE TM polarizations are described; they allow connecting regular strip waveguides loss lower than 1 dB per taper. Our coupler presents a very compact design negligible wavelength dependence its crossover length (and consequence coupling coefficient, κ), over 40 nm bandwidth. This flatten response represents bandwidth enhancement respect standard couplers (made using or rib waveguides), particular mode. bends demonstrated, their radius analyzed, fabricated have range 0.8-1.6 90 degrees bend. Simulated measured results show promise large-scale fabrication high sensitivity sensors based engineered properties, tailored specific applications.