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WO2012031208A3 - Ultra-sensitive chemical vapor detection using micro-cavity photothermal spectroscopy - Google Patents

Ultra-sensitive chemical vapor detection using micro-cavity photothermal spectroscopy Download PDF

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Publication number
WO2012031208A3
WO2012031208A3 PCT/US2011/050338 US2011050338W WO2012031208A3 WO 2012031208 A3 WO2012031208 A3 WO 2012031208A3 US 2011050338 W US2011050338 W US 2011050338W WO 2012031208 A3 WO2012031208 A3 WO 2012031208A3
Authority
WO
WIPO (PCT)
Prior art keywords
micro
cavity
species
chemical vapor
detecting
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/US2011/050338
Other languages
French (fr)
Other versions
WO2012031208A2 (en
Inventor
Juejun Hu
Hongtao Lin
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
University of Delaware
Original Assignee
University of Delaware
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by University of Delaware filed Critical University of Delaware
Publication of WO2012031208A2 publication Critical patent/WO2012031208A2/en
Publication of WO2012031208A3 publication Critical patent/WO2012031208A3/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
    • G01N21/171—Systems in which incident light is modified in accordance with the properties of the material investigated with calorimetric detection, e.g. with thermal lens detection
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/75—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated
    • G01N21/77—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated by observing the effect on a chemical indicator
    • G01N21/7703—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated by observing the effect on a chemical indicator using reagent-clad optical fibres or optical waveguides
    • G01N21/7746—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated by observing the effect on a chemical indicator using reagent-clad optical fibres or optical waveguides the waveguide coupled to a cavity resonator

Landscapes

  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)
  • Investigating Or Analyzing Materials Using Thermal Means (AREA)

Abstract

Apparatus for detecting a chemical vapor species, comprising a micro-cavity having a first resonant frequency corresponding to the absorption wavelength of the species and a second resonant frequency, an ambient area surrounding the micro-cavity for receiving the species, a source for directing a mid- to far-infrared pump beam having a resonant mode coincident with the first frequency into the micro-cavity, a source for directing a near-infrared probe beam tuned to the second resonant frequency into the micro-cavity, and detectors for detecting the probe beam after transmission through the micro-cavity. The pump beam induces optical absorption by the vapor species, causing photothermal effects in the micro-cavity to shift the second resonant frequency. A processor identifies and correlates the wavelength shift to a characteristic photothermal signal for the chemical vapor species. Apparatus for detecting multiple species and methods for detecting single or multiple species are also disclosed.
PCT/US2011/050338 2010-09-02 2011-09-02 Ultra-sensitive chemical vapor detection using micro-cavity photothermal spectroscopy Ceased WO2012031208A2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US37961510P 2010-09-02 2010-09-02
US61/379,615 2010-09-02

Publications (2)

Publication Number Publication Date
WO2012031208A2 WO2012031208A2 (en) 2012-03-08
WO2012031208A3 true WO2012031208A3 (en) 2012-05-10

Family

ID=45773547

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2011/050338 Ceased WO2012031208A2 (en) 2010-09-02 2011-09-02 Ultra-sensitive chemical vapor detection using micro-cavity photothermal spectroscopy

Country Status (1)

Country Link
WO (1) WO2012031208A2 (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9297756B2 (en) * 2013-02-01 2016-03-29 Battelle Memorial Institute Capillary absorption spectrometer and process for isotopic analysis of small samples
CN105675529B (en) * 2016-01-21 2018-10-12 电子科技大学 Microminiature mid-infrared light waveguide gas sensor
US10132743B2 (en) 2016-01-25 2018-11-20 General Electric Company Fixed optics photo-thermal spectroscopy reader and method of use
JP6786752B2 (en) 2016-07-13 2020-11-18 テクニシェ ウニヴェルジテーツ ウィーン Photothermal interferometers and methods
AT525495B1 (en) * 2021-09-17 2023-12-15 Univ Wien Tech Compensation detection with ICAPS within an optical cavity
CN119354889B (en) * 2024-12-24 2025-06-20 中国计量大学 A highly sensitive small amount of gas detection device and method based on double enhanced photothermal spectroscopy

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20020079453A1 (en) * 2000-06-28 2002-06-27 Tapalian Haig Charles Micro-optic absorption spectrometer
US7384797B1 (en) * 2000-10-12 2008-06-10 University Of Utah Research Foundation Resonant optical cavities for high-sensitivity high-throughput biological sensors and methods
US20090237666A1 (en) * 2006-09-15 2009-09-24 Frank Vollmer Methods and devices for measurements using pump-probe spectroscopy in high-q microcavities
US7667200B1 (en) * 2007-12-05 2010-02-23 Sandia Corporation Thermal microphotonic sensor and sensor array
US7781217B2 (en) * 2002-10-02 2010-08-24 California Institute Of Technology Biological and chemical microcavity resonant sensors and methods of detecting molecules

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20020079453A1 (en) * 2000-06-28 2002-06-27 Tapalian Haig Charles Micro-optic absorption spectrometer
US7384797B1 (en) * 2000-10-12 2008-06-10 University Of Utah Research Foundation Resonant optical cavities for high-sensitivity high-throughput biological sensors and methods
US7781217B2 (en) * 2002-10-02 2010-08-24 California Institute Of Technology Biological and chemical microcavity resonant sensors and methods of detecting molecules
US20090237666A1 (en) * 2006-09-15 2009-09-24 Frank Vollmer Methods and devices for measurements using pump-probe spectroscopy in high-q microcavities
US7667200B1 (en) * 2007-12-05 2010-02-23 Sandia Corporation Thermal microphotonic sensor and sensor array

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
HU, JUEJUN.: "Ultra-sensitive chemical vapor detection using micro-cavity photothermal spectroscopy.", OPTICS EXPRESS., vol. 18, no. 21, October 2010 (2010-10-01), pages 22174 - 22186 *

Also Published As

Publication number Publication date
WO2012031208A2 (en) 2012-03-08

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