Optical heterodyne detection for ultra-high Q micro-disk laser sensor
| Autor: | Young-Wan Choi, Chil-Min Kim, Tae-Ryong Kim, Mi Jung, Byung-Hee Son, Kwang Ryong Oh, Hong-Seung Kim, Myung-Gi Ji |
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| Rok vydání: | 2016 |
| Předmět: |
Materials science
business.industry Physics::Optics Laser 01 natural sciences Optical heterodyne detection 010305 fluids & plasmas law.invention Wavelength Optics law 0103 physical sciences Lasing wavelength Heterodyne detection Disk laser Spectral resolution 010306 general physics business Biosensor |
| Zdroj: | SPIE Proceedings. |
| ISSN: | 0277-786X |
| DOI: | 10.1117/12.2212466 |
| Popis: | In this paper, we propose a bio-sensing method using optical heterodyne detection for ultra-high Q micro-disk laser (MDL) sensor platform. MDL structure with ultra-high Q-factor (> 108) has advantage in detecting a small variation of the lasing wavelength. For example, when a single molecule is attached to sidewall of MDL, the lasing wavelength is changed by sub-pm. Optical spectrum analyzer (OSA) has limits to detect sub-pm variation in the resonant wavelength because of the spectral resolution. In order to overcome this limitation, we used a heterodyne detection method which needs two MDLs with the same characteristics. |
| Databáze: | OpenAIRE |
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