Title: Resonant optical transducers for in-situ gas detection

Abstract

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.

Inventors:

Bond, Tiziana C; Cole, Garrett; Goddard, Lynford

Issue Date:

2016-06-28

Research Org.:

Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)

Sponsoring Org.:

USDOE

OSTI Identifier:

1259697

Patent Number(s):

9377399

Application Number:

13/674,839

Assignee:

Lawrence Livermore National Security, LLC (Livermore, CA)

Patent Classifications (CPCs):

G - PHYSICS G01 - MEASURING G01N - INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES

H - ELECTRICITY H01 - BASIC ELECTRIC ELEMENTS H01S - DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT

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G - PHYSICS G01 - MEASURING G01N - INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES

G01N2021/396 - {Type of laser source}
G01N2021/399 - {Diode laser}
G01N21/39 - using tunable lasers
G01N21/774 - {the reagent being on a grating or periodic structure}
G01N2201/06113 - Coherent sources
G01N2201/068 - Optics, miscellaneous

H - ELECTRICITY H01 - BASIC ELECTRIC ELEMENTS H01S - DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT

H01S2302/00 - Amplification / lasing wavelength
H01S3/08059 - {Constructional details of the reflector, e.g. shape
H01S3/1053 - {Control by pressure or deformation}
H01S3/1055 - one of the reflectors being constituted by a diffraction grating
H01S5/0028 - {Laser diodes used as detectors}
H01S5/10 - Construction or shape of the optical resonator {, e.g. extended or external cavity, coupled cavities, bent-guide, varying width, thickness or composition of the active region
H01S5/18366 - {Membrane DBR, i.e. a movable DBR on top of the VCSEL}
H01S5/18369 - {based on dielectric materials}

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DOE Contract Number:  

AC52-07NA27344

Resource Type:

Patent

Resource Relation:

Patent File Date: 2012 Nov 12

Country of Publication:

United States

Language:

English

Subject:

47 OTHER INSTRUMENTATION; 36 MATERIALS SCIENCE; 54 ENVIRONMENTAL SCIENCES