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Proceedings Paper

Avalanche-free tunnel-junction photodetectors with very high gain and responsivity
Author(s): Jeong-S. Moon; Shuoqin Wang; Bin Q. Shi; Rajesh Rajaval; Danny Wong; Joel Schulman
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Paper Abstract

We present a prototype photodetector in which the built-in "tunneling structure" serves as an internal gain mechanism for photon detection. Initial feasibility studies demonstrated that the new photon detector offers an optical responsivity as high as 3000 A/W peaked at λ=1.3 μm at less than 1 V bias applied. The measurements were carried out using a photospectrometer setup in a continuous mode at room-temperature. Very strong (> 1000) responsivity is also measured from visible to SWIR even with a simple optical coupling scheme that utilizes very thin absorber layers in the prototype devices. The dark current density is ~ 5×10-10 A/μm2 at the operating bias. Room-temperature NEP was calculated based on a shot noise measurement, yielding NEP of 4~ 5×10-15 W/Hz1/2 and D* of 2~3×1012 cmHz1/2/W, peaked at a bias of 0.3 V at a fixed wavelength of λ=1.3 μm.

Paper Details

Date Published: 29 August 2006
PDF: 5 pages
Proc. SPIE 6308, Photonics for Space Environments XI, 63080O (29 August 2006); doi: 10.1117/12.678100
Show Author Affiliations
Jeong-S. Moon, HRL Labs. (United States)
Shuoqin Wang, HRL Labs. (United States)
Bin Q. Shi, HRL Labs. (United States)
Rajesh Rajaval, HRL Labs. (United States)
Danny Wong, HRL Labs. (United States)
Joel Schulman, HRL Labs. (United States)

Published in SPIE Proceedings Vol. 6308:
Photonics for Space Environments XI
Edward W. Taylor, Editor(s)

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