We propose an on-chip photonic particle sensor design that can perform particle sizing and counting for various environmental applications. The sensor is based on micro photonic ring resonators that are able to detect the presence of the free space particles through the interaction with their evanescent electric field tail. The sensor can characterize a wide range of the particle size ranging from a few nano meters to micron (~1 micron). The photonic platform offers high sensitivity, compactness, fast response of the device. Further, FDTD simulations are performed to analyze different particle-light interactions. Such a compact and portable platform, packaged with integrated photonic circuit provides a useful sensing modality in space shuttle and environmental applications.
Robin Singh, Danhao Ma, Anu Agarwal, and Brian Anthony, "On-chip photonic particle sensor," Proc. SPIE 10491, Microfluidics, BioMEMS, and Medical Microsystems XVI, 1049112 (Presented at SPIE BiOS: January 29, 2018; Published: 19 February 2018); https://doi.org/10.1117/12.2289152.
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