Effect of compressive strain on the performance of p-type quantum well infrared photodetectors

Sheng S. Li; Jerome T. Chu

doi:10.1117/12.271183

15 April 1997 Effect of compressive strain on the performance of p-type quantum well infrared photodetectors

Sheng S. Li, Jerome T. Chu

Proceedings Volume 2999, Photodetectors: Materials and Devices II; (1997) https://doi.org/10.1117/12.271183
Event: Photonics West '97, 1997, San Jose, CA, United States

Abstract

A detailed study of the performance of compressively strained p-type III-V quantum well infrared photodetectors (p-QWIPs) is presented in this work. Three device structures composed of InGaAs/GaAs, InGaAs/AlGaAs, and InGaAs/AlGaAs/GaAs for normal incidence absorption have been fabricated and analyzed, with the results being compared with similar reported unstrained p-QWIPs. In all three QWIP structures, the quantum well layers are under biaxial compressive strain ranging from -0.8 to 2.8 percent, while the barrier layers are lattice matched to the substrate. The detection peaks of the quantum well infrared photodetectors ranged from 7.4 micrometers to 10.4 micrometers . The detectors utilized the bound-to-continuum, bound-to-quasi- bound, and step bound-to-miniband intersubband transitions for infrared detection. The results showed that responsivities of up to 90 mA/W and detectivities from 10⁹ to over 10¹⁰ cm (root) Hz/W are achieved under moderate applied bias and at reasonable operating temperatures, demonstrating the viability of the strained layer p-doped quantum well infrared photodetectors for staring focal plane array applications.

Citation Download Citation

Sheng S. Li and Jerome T. Chu "Effect of compressive strain on the performance of p-type quantum well infrared photodetectors", Proc. SPIE 2999, Photodetectors: Materials and Devices II, (15 April 1997); https://doi.org/10.1117/12.271183

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