상세정보
학술지
Optical Biochemical Sensor based on Half-circled Microdisk Laser Diode
- 발행일
- 201710
- 출처
- Optics Express, v.25 no.21, pp.24939-24945
- ISSN
- 1094-4087
- 출판사
- Optical Society of America(OSA)
- 협약과제
- 17JB1100, 극고품위값 마이크로디스크 레이저 및 고감도 화학센서 개발, 오광룡
- 초록
- In this study, a half-circled cavity based microdisk laser diode is proposed and demonstrated experimentally for an integrated photonic biochemical sensor. Conventional microdisk sensors have limitations in optical coupling and reproducibility. In order to overcome these drawbacks, we design a novel half-circled micro disk laser (HC-MDL) which is easy to manufacture and has optical output directionality. The Q-factor of the fabricated HC-MDL was measured as 7.72 × 106 using the self-heterodyne method and the side mode suppression ratio was measured as 23 dB. Moreover, gas sensing experiments were performed using the HC-MDL sensor. A wavelength shift response of 14.21 pm was obtained for 100 ppb dimethyl methylphosphonate (DMMP) gas and that of 14.70 pm was obtained for 1 ppm ethanol gas. These results indicate the possibility of highly sensitive gas detection at ppb levels using HC-MDL. This attractive feature of the HC-MDL sensor is believed to be very useful for a wide variety of optical biochemical sensor applications.
- KSP 제안 키워드
- As 2, Dimethyl methylphosphonate, Ethanol Gas, Gas detection, Gas sensing, Heterodyne method, Highly sensitive, Laser diode(LD), Microdisk laser, Optical coupling, Quality-factor(Q-factor)