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Design Rule of Mach-Zehnder Interferometer Sensors for Ultra-High Sensitivity
- Source :
- Sensors (Basel, Switzerland), Sensors, Vol 20, Iss 2640, p 2640 (2020), Sensors, Volume 20, Issue 9
- Publication Year :
- 2020
- Publisher :
- MDPI, 2020.
-
Abstract
- A design rule for a Mach-Zehnder interferometer (MZI) sensor is presented, allowing tunable sensitivity by appropriately choosing the MZI arm lengths according to the formula given in this paper. The present MZI sensor designed by this method can achieve an ultra-high sensitivity, which is much higher than any other traditional MZI sensors. An example is given with silicon-on-insulator (SOI) nanowires and the device sensitivity is as high as 106 nm/refractive-index -unit (or even higher), by choosing the MZI arms appropriately. This makes it possible for one to realize a low-cost optical sensing system with a detection limit as high as 10&minus<br />6 refractive-index-unit, even when a cheap optical spectrum analyzer with low-resolution (e.g., 1 nm) is used for the wavelength-shift measurement.
- Subjects :
- Nanowire
Silicon on insulator
Optical spectrum analyzer
02 engineering and technology
lcsh:Chemical technology
Mach–Zehnder interferometer
01 natural sciences
Biochemistry
Article
Analytical Chemistry
010309 optics
Arm lengths
Optics
Optical sensing
0103 physical sciences
lcsh:TP1-1185
Electrical and Electronic Engineering
Instrumentation
Mach-Zehnder interferometer sensor
Physics
business.industry
polarization-selective devices
021001 nanoscience & nanotechnology
Atomic and Molecular Physics, and Optics
Interferometry
integrated optics
0210 nano-technology
business
Sensitivity (electronics)
Subjects
Details
- Language :
- English
- ISSN :
- 14248220
- Volume :
- 20
- Issue :
- 9
- Database :
- OpenAIRE
- Journal :
- Sensors (Basel, Switzerland)
- Accession number :
- edsair.doi.dedup.....4bdc5071753451f01a5c633a58ad174e