Patch antenna terahertz photodetectors

Journal Article · Mon Apr 20 00:00:00 EDT 2015 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.4918983· OSTI ID:22398916

Palaferri, D.; Chen, Y. N.; Madeo, J.; Vasanelli, A.; Sirtori, C. ^[1]; Li, L. H.; Davies, A. G.; Linfield, E. H. ^[2]

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1. Laboratoire Matériaux et Phénomènes Quantiques, Université Paris Diderot, Sorbonne Paris Cité, CNRS-UMS 7162, 75013 Paris (France)
2. School of Electronic and Electrical Engineering, University of Leeds, Leeds LS2 9JT (United Kingdom)

We report on the implementation of 5 THz quantum well photodetector exploiting a patch antenna cavity array. The benefit of our plasmonic architecture on the detector performance is assessed by comparing it with detectors made using the same quantum well absorbing region, but processed into a standard 45° polished facet mesa. Our results demonstrate a clear improvement in responsivity, polarization insensitivity, and background limited performance. Peak detectivities in excess of 5 × 10{sup 12} cmHz{sup 1/2}/W have been obtained, a value comparable with that of the best cryogenic cooled bolometers.

• OSTI ID: 22398916
• Journal Information: Applied Physics Letters, Vol. 106, Issue 16; Other Information: (c) 2015 Author(s); Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
77 NANOSCIENCE AND NANOTECHNOLOGY
ABSORPTION
ANTENNAS
BOLOMETERS
COMPARATIVE EVALUATIONS
IMPLEMENTATION
PERFORMANCE
PHOTODETECTORS
PLASMONS
POLARIZATION
QUANTUM WELLS
THZ RANGE