Open AccessOn-chip spectrometer with a circular-hole defect for optical sensing applications
Author(s) -
Jun Song,
Xiang Zhou,
Yuan-zhou Li,
Xuan Luo
Publication year - 2012
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.20.019226
Subject(s) - spectrometer , optics , materials science , diffraction grating , grating , photonics , chip , diffraction , optoelectronics , diffraction efficiency , physics , telecommunications , computer science
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.