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Proceedings Paper

Photonic crystal-enhanced quantum dot infrared photodetectors
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Paper Abstract

Quantum dot infrared photodetectors (QDIPs) promise improved performance over existing technologies in the form of higher temperature operation and normal-incidence detection. Variation in the size of self-assembled quantum dots leads to a broadened spectral response, which is undesirable for multi-color detection. Photonic crystal slabs can filter the transmission of normally-incident light using Fano resonances, and thus may be integrated with QDIPs to create a narrowband detector. Finite-difference time-domain simulations were used to optimize such a filter for QDIPs grown by metal-organic chemical vapor deposition. The simulations predict that the integrated detector could show up to 76% decrease in the detector linewidth, with a tunable peak location. These devices were then fabricated by standard optical lithography, however the spectral width of the integrated device was similar to that of the unfiltered QDIP. This is attributed to imperfections in the filter, so alternative fabrication methods are discussed for future processing.

Paper Details

Date Published: 9 September 2008
PDF: 11 pages
Proc. SPIE 7039, Nanoengineering: Fabrication, Properties, Optics, and Devices V, 70390S (9 September 2008); doi: 10.1117/12.793558
Show Author Affiliations
I. R. McKerracher, The Australian National Univ. (Australia)
H. T. Hattori, The Australian National Univ. (Australia)
Univ. of New South Wales, The Australian Defence Force Academy (Australia)
L. Fu, The Australian National Univ. (Australia)
H. Hoe Tan, The Australian National Univ. (Australia)
C. Jagadish, The Australian National Univ. (Australia)

Published in SPIE Proceedings Vol. 7039:
Nanoengineering: Fabrication, Properties, Optics, and Devices V
Elizabeth A. Dobisz; Louay A. Eldada, Editor(s)

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