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Nanoscale quantum dot infrared sensors with photonic crystal cavity

Posani, K. T. and Tripathi, V. and Annamalai, S. and Weisse-Bernstein, N. R. and Krishna, S. and Perahia, R. and Crisafulli, O. and Painter, O. J. (2006) Nanoscale quantum dot infrared sensors with photonic crystal cavity. Applied Physics Letters, 88 (15). Art. No. 151104. ISSN 0003-6951. doi:10.1063/1.2194167.

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We report high performance infrared sensors that are based on intersubband transitions in nanoscale self-assembled quantum dots combined with a microcavity resonator made with a high-index-contrast two-dimensional photonic crystal. The addition of the photonic crystal cavity increases the photocurrent, conversion efficiency, and the signal to noise ratio (represented by the specific detectivity D*) by more than an order of magnitude. The conversion efficiency of the detector at Vb=–2.6 V increased from 7.5% for the control sample to 95% in the PhC detector. In principle, these photonic crystal resonators are technology agnostic and can be directly integrated into the manufacturing of present day infrared sensors using existing lithographic tools in the fabrication facility.

Item Type:Article
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Painter, O. J.0000-0002-1581-9209
Additional Information:© 2006 American Institute of Physics (Received 14 November 2005; accepted 18 March 2006; published online 12 April 2006) The authors would like to acknowledge support from NSF ECS Grant Nos. 0428756, 0401154, and 0434102 and the AFOSR MURI Grant on Plasmonics.
Funding AgencyGrant Number
Air Force Office of Scientific Research (AFOSR)UNSPECIFIED
Subject Keywords:infrared detectors; photodetectors; photonic crystals; nanotechnology; self-assembly; optical resonators; microcavities; photoconductivity; semiconductor quantum dots; quantum well devices
Issue or Number:15
Record Number:CaltechAUTHORS:POSapl06
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:3075
Deposited By: Archive Administrator
Deposited On:12 May 2006
Last Modified:08 Nov 2021 19:53

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