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Proceedings Paper

Polymer-coated vertical-cavity surface-emitting laser diode vapor sensor
Author(s): Thor Ansbæk; Claus H. Nielsen; Niels B. Larsen; Søren Dohn; Anja Boisen; Il-Sug Chung; David Larsson; Kresten Yvind
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Paper Abstract

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.

Paper Details

Date Published: 5 February 2010
PDF: 10 pages
Proc. SPIE 7615, Vertical-Cavity Surface-Emitting Lasers XIV, 76150A (5 February 2010); doi: 10.1117/12.841935
Show Author Affiliations
Thor Ansbæk, DTU Fotonik (Denmark)
Claus H. Nielsen, DTU Nanotech (Denmark)
Niels B. Larsen, DTU Nanotech (Denmark)
Søren Dohn, DTU Nanotech (Denmark)
Anja Boisen, DTU Nanotech (Denmark)
Il-Sug Chung, DTU Fotonik (Denmark)
David Larsson, DTU Fotonik (Denmark)
Kresten Yvind, DTU Fotonik (Denmark)

Published in SPIE Proceedings Vol. 7615:
Vertical-Cavity Surface-Emitting Lasers XIV
James K. Guenter; Kent D. Choquette, Editor(s)

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