Chip-scale spectral sensing systems enable many existing and emerging applications, such as color picking, authentication and spectral analysis of substances, materials, foods and fluids. The integration of nanophotonic optical phased arrays (OPA) with alkali vapor cells has the potential to enhance the performance of chip-scale atomic systems by enabling novel methods for beam shaping and active alignment in atomic spectroscopy. In this work, we present the first demonstration of. Optical spectroscopy in the near-infrared (NIR) or visible spectra offers a simple analytical method for characterizing materials in a wide range of applications. However, the cost and size of suitable equipment put the technology out of reach of emerging opportunities, particularly in mobile and. theory27. Here we present a silicon on-chip digital Fourier transform spectrometer consisting of.
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