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Quantum dot photonic crystal detectors

Posani, Kalyan Teja and Tripathi, Vaibhav and Annamalai, Senthil and Krishna, Sanjay and Perahia, Raviv and Crisafulli, Orion and Painter, Oskar (2006) Quantum dot photonic crystal detectors. In: Quantum Dots, Particles, and Nanoclusters III. Proceedings of SPIE. No.6129. Society of Photo-optical Instrumentation Engineers (SPIE) , Bellingham, WA, Art. No. 612906. ISBN 0819461717.

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In this paper we report the use of a photonic crystal resonant cavity to increase the quantum efficiency, detectivity (D*) and the background limited infrared photodetector (BLIP) temperature of a quantum dot detector. The photonic crystal is incorporated in InAs/InGaAs/GaAs dots-in-well (DWELL) detector using Electron beam lithography. From calibrated blackbody measurements, the conversion efficiency of the detector with the photonic crystal (DWELL-PC) is found to be 58.5% at -2.5 V while the control DWELL detectors have quantum efficiency of 7.6% at the same bias. We observed no significant reduction in the dark current of the photonic crystal devices compared to the normal structure. The generation-recombination limited D* at 77K with a 300K F1.7 background, is estimated to be 6 x 10^(10) cm Hz^(1/2)/W at -3V bias for the DWELL-PC which is a factor of 20 higher than that of the control sample. We also observed a 20% increase in the BLIP temperature for the DWELL-PCs.

Item Type:Book Section
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Painter, Oskar0000-0002-1581-9209
Additional Information:© 2006 Society of Photo-Optical Instrumentation Engineers (SPIE). The authors would like to acknowledge support from NSF ECS Grants 0428756/ 0401154/0434102.
Funding AgencyGrant Number
Subject Keywords:Photonic crystal, Resonant Cavity, Quantum dots, Infrared sensors, Detectors, Focal plane arrays, Conversion Efficiency, Detectivity, Dark current
Series Name:Proceedings of SPIE
Issue or Number:6129
Record Number:CaltechAUTHORS:20180709-163430790
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Official Citation:Kalyan Teja Posani, Vaibhav Tripathi, Senthil Annamalai, Sanjay Krishna, Raviv Perahia, Orion Crisafulli, Oskar Painter, "Quantum dot photonic crystal detectors", Proc. SPIE 6129, Quantum Dots, Particles, and Nanoclusters III, 612906 (7 February 2006); doi: 10.1117/12.641750;
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:87674
Deposited By: George Porter
Deposited On:10 Jul 2018 15:27
Last Modified:03 Oct 2019 19:58

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