Broad spectrum integrated optics for scalable quantum computing

We present progress on an integrated photonics platform that simultaneously covers a broad spectral range from the ultraviolet (UV) to Short-Wave Infrared (SWIR). Our platform has been designed with a thin film of SiN to support a multi-wavelength approach on the same wafer. We report the optimized design of input grating couplers incorporating variations on period, duty cycle, tapers and angles for multiple spectral ranges. We develop a photonics design kit for our platform including splitters and routing circuits tailored to the wavelengths of interest from UV-SWIR. We report on optimization of the fabrication using e-beam lithography, dry etching and overcladding. The devices are assessed through optical measurements including coupling, propagation loss and device loss.