High-speed photocurrent in quantum well infrared photodetectors

Harald Schneider; Peter Koidl; Martin Walther; Z. Lao; Michael Schlechtweg

doi:10.1117/12.366729

26 October 1999 High-speed photocurrent in quantum well infrared photodetectors

Harald Schneider, Peter Koidl, Martin Walther, Z. Lao, Michael Schlechtweg

Proceedings Volume 3794, Materials and Electronics for High-Speed and Infrared Detectors; (1999) https://doi.org/10.1117/12.366729
Event: SPIE's International Symposium on Optical Science, Engineering, and Instrumentation, 1999, Denver, CO, United States

Abstract

Quantum well infrared photodetectors (QWIPs) are very promising for ultrafast photodetection in the 8 - 12 micrometers infrared regime. We report on time-resolved studies of the intersubband photocurrent in GaAs/AlGaAs (QWIPs). The photocurrent is excited by sub-picosecond infrared pulses, which are obtained by difference frequency mixing of the signal and idler waves of an optical parametric oscillator. Using a particular detector geometry with < 900 micrometers ² device area, the measured electrical pulses have a full- width at half-maximum of only 16 ps and a 10% - 90% rise time of 13 ps. For practical applications, in particular for heterodyne detection, it is desirable to reduce the noise floor by using a cooled low-noise preamplifier. We have performed experiments with a low-temperature hybrid circuit consisting of a QWIP in connection with a GaAs transimpedance amplifier based on HEMT technology. This configuration yields a rise time of 19 ps at an amplifier gain of approximately 35 dB.

Citation Download Citation

Harald Schneider, Peter Koidl, Martin Walther, Z. Lao, and Michael Schlechtweg "High-speed photocurrent in quantum well infrared photodetectors", Proc. SPIE 3794, Materials and Electronics for High-Speed and Infrared Detectors, (26 October 1999); https://doi.org/10.1117/12.366729

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available

Members: $17.00

Non-members: $21.00 ADD TO CART

PROCEEDINGS
7 PAGES

DOWNLOAD PAPER SAVE TO MY LIBRARY

GET CITATION

RIGHTS & PERMISSIONS

Get copyright permission Get copyright permission on Copyright Marketplace

KEYWORDS

Quantum well infrared photodetectors

Heterodyning

Picosecond phenomena

Sensors

Amplifiers

Gallium arsenide

Infrared radiation

Show All Keywords

Keywords/Phrases

Search In:

Publication Years