Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/61788
Title: Integrated label-free optical biochemical sensor with a large measurement range based on an angular grating-microring resonator
Authors: Ma, T
Sun, L
Yuan, J
Sang, X
Yan, B
Wang, K
Yu, C
Issue Date: 2016
Publisher: Optical Society of America
Source: Applied optics, 2016, v. 55, no. 18, p. 4784-4790 How to cite?
Journal: Applied optics 
Abstract: We propose and design a photonic-integrated optical biochemical sensor, which comprises a microring resonator and angular gratings in a silicon-on-insulator waveguide. With the combination of the angular gratings, the measurement range of the angular grating-microring resonator-based sensor significantly increases without the restriction of a free spectral range. Optimization of the several key structural parameters is investigated to achieve favorable transmission properties. A high-quality factor of more than 1.03 Ã 105 can meet the requirements of high sensitivity and low detection limit. The simulation results on the biochemical bulk sensing show that a concentration sensitivity of more than 95.27 pm/% and detection limit of less than 0.329% can be obtained. A large measurement range of 50.2 nm is achieved by the combination of the angular gratings. The investigation on the combination of microring resonator and angular grating is a valuable exploration of the liquid and gas biomedical sensing for the ultra-large measurement range.
URI: http://hdl.handle.net/10397/61788
ISSN: 1559-128X
EISSN: 2155-3165
DOI: 10.1364/AO.55.004784
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