Patent ID: 9157850
Filing Date: 2015-10-13
Classification: B82Y,G01N,G02B

Abstract:
1. A method for on-chip optical absorption spectroscopy, the method comprising: generating electromagnetic radiation from a broadband source; coupling the electromagnetic radiation from the broadband source to an on-chip optical absorption spectroscopy apparatus comprising: measuring a first output transmission spectrum, wherein measuring the first output transmission spectrum comprises measuring the electromagnetic radiation from the output ridge waveguide of the on-chip optical absorption spectroscopy apparatus in the absence of analyte within the photonic crystal slot waveguide; exposing the on-chip optical absorption spectroscopy apparatus to the analyte; measuring a second output transmission spectrum, wherein measuring the second output transmission spectrum comprises measuring the electromagnetic radiation from the output ridge waveguide of the on-chip optical absorption spectroscopy apparatus in the presence of analyte within the photonic crystal slot waveguide; taking the difference between the first output transmission spectrum and the second output transmission spectrum to determine an absorbance spectrum; and identifying the analyte from the absorbance spectrum.