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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 20, Iss. 5 — Feb. 27, 2012
  • pp: 5622–5628

Detectivity enhancement in quantum well infrared photodetectors utilizing a photonic crystal slab resonator

S. Kalchmair, R. Gansch, S. I. Ahn, A. M. Andrews, H. Detz, T. Zederbauer, E. Mujagić, P. Reininger, G. Lasser, W. Schrenk, and G. Strasser  »View Author Affiliations


Optics Express, Vol. 20, Issue 5, pp. 5622-5628 (2012)
http://dx.doi.org/10.1364/OE.20.005622


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Abstract

We characterize the performance of a quantum well infrared photodetector (QWIP), which is fabricated as a photonic crystal slab (PCS) resonator. The strongest resonance of the PCS is designed to coincide with the absorption peak frequency at 7.6 µm of the QWIP. To accurately characterize the detector performance, it is illuminated by using single mode mid-infrared lasers. The strong resonant absorption enhancement yields a detectivity increase of up to 20 times. This enhancement is a combined effect of increased responsivity and noise current reduction. With increasing temperature, we observe a red shift of the PCS-QWIP resonance peak of −0.055 cm−1/K. We attribute this effect to a refractive index change and present a model based on the revised plane wave method.

© 2012 OSA

OCIS Codes
(040.4200) Detectors : Multiple quantum well
(230.5298) Optical devices : Photonic crystals

ToC Category:
Detectors

History
Original Manuscript: December 23, 2011
Revised Manuscript: February 10, 2012
Manuscript Accepted: February 10, 2012
Published: February 22, 2012

Citation
S. Kalchmair, R. Gansch, S. I. Ahn, A. M. Andrews, H. Detz, T. Zederbauer, E. Mujagić, P. Reininger, G. Lasser, W. Schrenk, and G. Strasser, "Detectivity enhancement in quantum well infrared photodetectors utilizing a photonic crystal slab resonator," Opt. Express 20, 5622-5628 (2012)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-20-5-5622


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