Sensors & Transducers Journal (ISSN 1726- 5479) |
|
Sensors & Transducers Journal 2010 Sensors & Transducers Journal 2009 Sensors & Transducers Journal 2008 Sensors & Transducers Journal 2007 2000-2002 S&T e-Digest Contents
|
||
|
Vol. 10, Special Issue, February 2011, pp.60-70
Charge-sensitive Infrared Phototransisotrs: Single-photon Detctors in the Long-Wavelength Infrared
1Takeji Ueda and 2Susumu Komiyama
Department of Basic Science, the University of Tokyo
Komaba 3-8-1, Meguro-ku, Tokyo, 153-8902, Japan
Fax/Tel.: +81-3-5454-6960
E-mail: ueda@iis.u-tokyo.ac.jp
Received: 18 October 2010 /Accepted: 11 January 2011 /Published: 8 February 2011
Abstract: Novel ultrasensitive detectors in the wavelength range of λ = 5-50 μm have developed. The detectors are charge-sensitive infrared phototransistors (CSIPs) fabricated in GaAs/AlGaAs double quantum well structures. The devices serve as a phototransistor capable of counting single photons, while a function is similarly to CMOS image sensors. The excellent noise equivalent power (NEP = 6.8×10-19 W/Hz1/2) and specific detectivity (D* = 1.2×1015 cmHz1/2/W) are demonstrated for λ = 14.7 μm, which are by a few orders of magnitude superior to those of the other state-of-the-art detectors. These figures of merit persist up to 23K. Temperature dependence of the performance is studied and wavelength range expansion is attempted. The simple planar structure of CSIPs is feasible for array fabrication including future monolithic integration with reading circuits.
Keywords: THz, Single-photon detector, Ultrasensitive, Temperature dependence, Wavelength range expansion
Click <here> or title of paper to download the full pages article (1.86 Mb)
Read more about Optical Sensors
|
1999 - 2011 Copyright ©, International Frequency Sensor Association (IFSA). All Rights Reserved.
Home - News - Links - Archives - Tools - Standardization - Patents - Marketplace - Projects - Wish List - Subscribe - Search - Membership - Submit Press Release - Twitter
Members Area -Sensors Portal -Training Courses - S&T Digest - For advertisers - Bookstore - Forums - Polls - Sensor Jobs - e-Shop - Site Map - Video