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A Wavelength-Scalable Dual-Stage Photonic Integrated Circuit Spectrometer
Phone: (978) 738-8159
Email: cevans@psicorp.com
Phone: (978) 689-0003
Email: green@psicorp.com
Contact: Timothy Gehret
Address:
Phone: (404) 594-0950
Type: Nonprofit College or University
In this program, Physical Sciences Inc. (PSI) will team with Professor Ali Adibi’s group at the Georgia Institute of Technology to develop a photonic integrated circuit (PIC) spectrometer that can simultaneously achieve high-resolution over wide-bandwidths using a scalable and foundry-ready approach. While a PIC-based spectrometer is a key component for on-chip Raman, fluorescence, and absorption spectroscopy, it is also a general purpose tool for PIC designers when available within a foundry’s process-design kit (PDK). Our approach cascades two complimentary devices: a first-stage wide-bandwidth (>200 nm) coarse spectrometer formed using an echelle or arrayed-waveguide grating feeding a series of second-stage high-resolution (<1 nm) spectrometers consisting of arrays of high-quality-factor micro-resonators. Using a passive photonics platform with low-loss SiN waveguides and high-performance off-chip detectors enables high quantum efficiencies (>10%) that are fully compatible with low temperature operation (–40°C). Our approach is also highly adaptable and scalable in terms of center wavelength; it can be designed to operate over >200-nm bands throughout the visible and near-infrared wavelength regimes. In Phase II of this effort, we will adapt this spectrometer to a commercial foundry, including developing a PDK, and demonstrate waveguide-enhanced Raman (WER) spectroscopy.
* Information listed above is at the time of submission. *