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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 16, Iss. 11 — May. 26, 2008
  • pp: 8174–8180

Refractive index sensing utilizing a cw photonic crystal nanolaser and its array configuration

Shota Kita, Kengo Nozaki, and Toshihiko Baba  »View Author Affiliations

Optics Express, Vol. 16, Issue 11, pp. 8174-8180 (2008)

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We demonstrate refractive index sensing using photonic crystal point shift nanolasers. These lasers operate continuously at room temperature by photopumping in a liquid, and exhibit a 50-dB peak intensity over the background level and a spectral linewidth of <26 pm, the resolution limit of the present experiment. The lasing wavelength shifts by soaking in different liquids; the wavelength to index sensitivity was 350 nm/RIU, the highest value recorded to date for nanocavity- based sensors. An index resolution of 9.0×10-5 was thus confirmed, leading to an expectation of a resolution of <10-6. We propose and demonstrate a spectrometer-free sensor based on nanolasers in an array configuration. These will be disposable sensors with very simple optical I/O. They are anticipated to be integrated with biochips and used for label-free single molecule detection.

© 2008 Optical Society of America

OCIS Codes
(140.5960) Lasers and laser optics : Semiconductor lasers
(230.5298) Optical devices : Photonic crystals

ToC Category:
Lasers and Laser Optics

Original Manuscript: April 4, 2008
Revised Manuscript: May 10, 2008
Manuscript Accepted: May 11, 2008
Published: May 20, 2008

Virtual Issues
Vol. 3, Iss. 6 Virtual Journal for Biomedical Optics

Shota Kita, Kengo Nozaki, and Toshihiko Baba, "Refractive index sensing utilizing a cw photonic crystal nanolaser and its array configuration," Opt. Express 16, 8174-8180 (2008)

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