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1. (WO2017034995) PLANAR DIFFRACTIVE DEVICE WITH MATCHING DIFFRACTION SPECTRUM

Pub. No.:    WO/2017/034995    International Application No.:    PCT/US2016/047811
Publication Date: Fri Mar 03 00:59:59 CET 2017 International Filing Date: Sat Aug 20 01:59:59 CEST 2016
IPC: G01J 3/44
G01N 21/31
G01J 1/44
Applicants: CALIFORNIA INSTITUTE OF TECHNOLOGY
Inventors: FARAON, Andrei
ARBABI, Amir
HORIE, Yu
Title: PLANAR DIFFRACTIVE DEVICE WITH MATCHING DIFFRACTION SPECTRUM
Abstract:
A solution containing a target molecule and a reference molecule is illuminated to obtain Raman signals. An optical metasurface is used as a diffractive optical element to split the Raman signal from the target molecule and the Raman signal from the reference molecule. The target and reference Raman signals can be detected at different locations with different photodetectors, and the target molecule concentration in the solution is determined by comparing the target and reference Raman signals.