title: On-chip spectrometer with a circular-hole defect for optical sensing applications.
abstract: We propose an optical sensor by integrating a circular-hole defect with an etched diffraction grating spectrometer based on amorphous silicon photonic platforms. There are some superiorities of this device, such as high sensitivity (~10000 nm/RIU), and ability to deliver component analysis from the near-infrared spectrum by using the integrated spectrometer. As application example, the chip is used for distinguishing similar biodiesel types and accurately determining their concentrations in a diesel oil mixture.
authors.affiliation: Institute of Optoelectronics, Key Laboratory of Optoelectronics Devices and Systems of Ministry of Education/Guangdong Province, Shenzhen University, Shenzhen, China. songjun@szu.edu.cn
authors.forename: Jun
authors.initials: J
authors.lastname: Song
authors.forename: Xiang
authors.initials: X
authors.lastname: Zhou
authors.forename: Yuan-zhou
authors.initials: YZ
authors.lastname: Li
authors.forename: Xuan
authors.initials: X
authors.lastname: Li
mesh_terms: D017076:Computer-Aided Design; D004867:Equipment Design; D019544:Equipment Failure Analysis; D019265:Spectroscopy, Near-Infrared / Q000295:instrumentation*; D018511:Systems Integration; D014159:Transducers