Long-wavelength infrared 128 x 128 GaAs/GaAlAs multiple quantum well focal plane array

Shmuel I. Borenstain; Uriel Arad; I Lyubina; A. Segal

doi:10.1117/12.287842

22 September 1997 Long-wavelength infrared 128 x 128 GaAs/GaAlAs multiple quantum well focal plane array

Shmuel I. Borenstain, Uriel Arad, I Lyubina, A. Segal

Proceedings Volume 3110, 10th Meeting on Optical Engineering in Israel; (1997) https://doi.org/10.1117/12.287842
Event: 10th Meeting on Optical Engineering in Israel, 1997, Jerusalem, Israel

Abstract

We report on the fabrication and thermal imaging demonstration of a 128 by 128 focal plane array (FPA). The chip consists of an MBE grown GaAs/GaAlAs multiple quantum well (MQW) infrared detector matrix connected via indium columns to nodes of a mated readout multiplexer Si device. The electron intersubband to the continuum transition in the quantum well, created by the GaAs/GaAlAs conductive band discontinuity, is the mechanism responsible for the responsivity in the 6.5 micrometer - 8.5 micrometer spectral range. Pixels are 50 micrometer by 50 micrometer in size, spaced 60 micrometers apart. The pixel D* is 8 X 10¹⁰ cm(root)Hz/W which is the background limited performance (BLIP) at 77 K for a 180 degree field of view and background temperature of 300 K. The chip, packaged in a leadless chip carrier, was installed in variable temperature cryostat mounted with F/3 optics. The Si readout multiplexer having only 6 X 10⁶ electrons (maximum) capacity of the integration well available to each pixel is the limiting factor in achieving a BLIP noise equivalent temperature difference (NETD). At an FPA operational temperature of 65 K, the measured NETD is 0.2 K.

Citation Download Citation

Shmuel I. Borenstain, Uriel Arad, I Lyubina, and A. Segal "Long-wavelength infrared 128 x 128 GaAs/GaAlAs multiple quantum well focal plane array", Proc. SPIE 3110, 10th Meeting on Optical Engineering in Israel, (22 September 1997); https://doi.org/10.1117/12.287842

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