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Virtual Journal for Biomedical Optics

Virtual Journal for Biomedical Optics


  • Editors: Andrew Dunn and Anthony Durkin
  • Vol. 9, Iss. 5 — Apr. 29, 2014

Nanosecond colloidal quantum dot lasers for sensing

B. Guilhabert, C. Foucher, A-M. Haughey, E. Mutlugun, Y. Gao, J. Herrnsdorf, H.D. Sun, H.V. Demir, M.D. Dawson, and N. Laurand  »View Author Affiliations

Optics Express, Vol. 22, Issue 6, pp. 7308-7319 (2014)

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Low-threshold, gain switched colloidal quantum dot (CQD) distributed-feedback lasers operating in the nanosecond regime are reported and proposed for sensing applications for the first time to the authors’ knowledge. The lasers are based on a mechanically-flexible polymeric, second order grating structure overcoated with a thin-film of CQD/PMMA composite. The threshold fluence of the resulting lasers is as low as 0.5 mJ/cm2 for a 610 nm emission and the typical linewidth is below 0.3 nm. The emission wavelength of the lasers can be set at the design stage and laser operation between 605 nm and 616 nm, while using the exact same CQD gain material, is shown. In addition, the potential of such CQD lasers for refractive index sensing in solution is demonstrated by immersion in water.

© 2014 Optical Society of America

OCIS Codes
(140.3490) Lasers and laser optics : Lasers, distributed-feedback
(280.4788) Remote sensing and sensors : Optical sensing and sensors
(250.5590) Optoelectronics : Quantum-well, -wire and -dot devices

ToC Category:

Original Manuscript: October 31, 2013
Manuscript Accepted: March 7, 2014
Published: March 21, 2014

Virtual Issues
Vol. 9, Iss. 5 Virtual Journal for Biomedical Optics

B. Guilhabert, C. Foucher, A-M. Haughey, E. Mutlugun, Y. Gao, J. Herrnsdorf, H.D. Sun, H.V. Demir, M.D. Dawson, and N. Laurand, "Nanosecond colloidal quantum dot lasers for sensing," Opt. Express 22, 7308-7319 (2014)

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