Photonic crystal-enhanced quantum dot infrared photodetectors
Date
2008
Authors
McKerracher, Ian
Hattori, Haroldo
Fu, Lan
Jagadish, Chennupati
Tan, Hark Hoe
Journal Title
Journal ISSN
Volume Title
Publisher
SPIE - The International Society for Optical Engineering
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.
Description
Keywords
Keywords: Crystal atomic structure; Detectors; Fabrication; Finite difference time domain method; Infrared detectors; Light; Lithography; Metallorganic chemical vapor deposition; Optical waveguides; Optoelectronic devices; Organic chemicals; Organic compounds; Phot Fano resonance; Finite-difference time-domain; Photonic crystal slab; Quantum dot infrared photodetector
Citation
Collections
Source
PROCEEDINGS OF SPIE, Volume 7039 Nanoengineering: Fabrication, Properties, Optics, and Devices V
Type
Conference paper