Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/21220
Title: Liquid refractive index sensors using resonant optical tunneling effect for ultra-high sensitivity
Authors: Jian, AQ
Zhang, XM
Zhu, WM
Liu, AQ
Keywords: Refractive index sensor
Refractometry
Resonant optical tunneling effect
Issue Date: 2011
Publisher: Elsevier
Source: Sensors and actuators. A, Physical, 2011, v. 169, no. 2, p. 347-351 How to cite?
Journal: Sensors and actuators. A, Physical 
Abstract: This paper reports the design and analysis of a liquid refractive index (RI) fiber sensor based on resonant optical tunneling effect (ROTE). The device utilizes an optical cavity formed between two angled silver-coated optical fibers to detect the RI changes by measuring the intensity variation of transmission intensity or the wavelength shift of transmission peak. The simulation results show that the intensity-based method could reach a sensitivity of 10-7 RIU (refractive index unit) and the spectrum-based method promises a sensitivity of 81,000 nm/RIU, which are much larger than those of Fabry-Pérot etalons and surface plasmon resonance sensors. With ultrahigh sensitivity, pico-litre sample volume and fiber integration, this sensor may find potential applications in biochemical analysis.
URI: http://hdl.handle.net/10397/21220
ISSN: 0924-4247
EISSN: 1873-3069
DOI: 10.1016/j.sna.2011.01.030
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