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 10-7RIU (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.
| Original language | English |
|---|---|
| Pages (from-to) | 347-351 |
| Number of pages | 5 |
| Journal | Sensors and Actuators, A: Physical |
| Volume | 169 |
| Issue number | 2 |
| DOIs | |
| Publication status | Published - 1 Oct 2011 |
Keywords
- Refractive index sensor
- Refractometry
- Resonant optical tunneling effect
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Instrumentation
- Condensed Matter Physics
- Surfaces, Coatings and Films
- Metals and Alloys
- Electrical and Electronic Engineering