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Title: Resonant optical transducers for in-situ gas detection

Configurations for in-situ gas detection are provided, and include miniaturized photonic devices, low-optical-loss, guided-wave structures and state-selective adsorption coatings. High quality factor semiconductor resonators have been demonstrated in different configurations, such as micro-disks, micro-rings, micro-toroids, and photonic crystals with the properties of very narrow NIR transmission bands and sensitivity up to 10.sup.-9 (change in complex refractive index). The devices are therefore highly sensitive to changes in optical properties to the device parameters and can be tunable to the absorption of the chemical species of interest. Appropriate coatings applied to the device enhance state-specific molecular detection.
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Issue Date:
OSTI Identifier:
Lawrence Livermore National Security, LLC (Livermore, CA) LLNL
Patent Number(s):
Application Number:
Contract Number:
Resource Relation:
Patent File Date: 2015 Oct 15
Research Org:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Sponsoring Org:
Country of Publication:
United States

Other works cited in this record:

Hydrogen gas sensor using Pd nanowires electro-deposited into anodized alumina template
journal, June 2006
  • Kim, Kyun Tae; Sim, Jun; Cho, Sung Min
  • IEEE Sensors Journal, Vol. 6, Issue 3, p. 509-513
  • DOI: 10.1109/JSEN.2006.874456

Sensitivity enhancement for CO gas detection using a SnO2–CeO2–PdOx system
journal, June 2005
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Nano-crystalline tungsten oxide NO2 sensor
journal, October 2003
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  • DOI: 10.1016/S0925-4005(03)00383-6

All-optical hydrogen sensor based on a high alloy content palladium thin film
journal, January 2006
  • Zhao, Z.; Carpenter, M. A.; Xia, H.
  • Sensors and Actuators B: Chemical, Vol. 113, Issue 1, p. 532-538
  • DOI: 10.1016/j.snb.2005.03.070

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