Polymer-coated vertical-cavity surface-emitting laser diode vapor sensor | Zendy

Thor Ansbæk | Zendy; Claus HélixNielsen | Zendy; Niels B. Larsen | Zendy; Søren Dohn | Zendy; Anja Boisen | Zendy; IlSug Chung | Zendy; David Larsson | Zendy; Kresten Yvind | Zendy

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Polymer-coated vertical-cavity surface-emitting laser diode vapor sensor

Author(s) -

Thor Ansbæk,

Claus HélixNielsen,

Niels B. Larsen,

Søren Dohn,

Anja Boisen,

IlSug Chung,

David Larsson,

Kresten Yvind

Publication year - 2009

Publication title -

proceedings of spie, the international society for optical engineering/proceedings of spie

Language(s) - English

Resource type - Conference proceedings

SCImago Journal Rank - 0.192

H-Index - 176

eISSN - 1996-756X

pISSN - 0277-786X

DOI - 10.1117/12.841935

Subject(s) - materials science , vertical cavity surface emitting laser , optoelectronics , distributed bragg reflector , laser , polymer , distributed bragg reflector laser , diode , coating , optics , semiconductor laser theory , composite material , wavelength , physics

We report a new method for monitoring vapor concentration of volatile organic compounds using a vertical-cavity surface-emitting laser (VCSEL). The VCSEL is coated with a polymer thin film on the top distributed Bragg reflector (DBR). The analyte absorption is transduced to the electrical domain through modulation of the VCSEL output power as the polymer swell. We have investigated the responsivity of this technique experimentally using a plasma polymerized polystyrene coating and explain the results theoretically as a reflectance modulation of the top DBR.

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