Monolithic on-chip mid-IR methane gas sensor with waveguide-integrated detector
- Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States); DOE/OSTI
- Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)
- CapeSym, Natick, MA (United States)
- Univ. of Central Florida, Orlando, FL (United States)
Herein we demonstrate a monolithic waveguide sensor integrated with a detector on-chip for mid-infrared absorption spectroscopic sensing. The optical sensing element comprises a chalcogenide glass spiral waveguide, and the detector is a PbTe photoconductor integrated directly with the chalcogenide waveguide. The limit of detection of the sensor for methane gas was experimentally assessed to be 1% by volume. Further optimization of the fabrication process and normalization of the laser power fluctuations should result in a maximum sensitivity of 330 ppmv.
- Research Organization:
- Univ. of Delaware, Newark, DE (United States)
- Sponsoring Organization:
- USDOE National Nuclear Security Administration (NNSA), Office of Defense Nuclear Nonproliferation (NA-20); National Science Foundation (NSF)
- Grant/Contract Number:
- NA0002509
- OSTI ID:
- 1614526
- Journal Information:
- Applied Physics Letters, Journal Name: Applied Physics Letters Journal Issue: 5 Vol. 114; ISSN 0003-6951
- Publisher:
- American Institute of Physics (AIP)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
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