Whither P-type GaAs/AlGaAs QWIP?

Frank Szmulowicz; Gail J. Brown

doi:10.1117/12.467659

21 May 2002 Whither P-type GaAs/AlGaAs QWIP?

Frank Szmulowicz, Gail J. Brown

Proceedings Volume 4650, Photodetector Materials and Devices VII; (2002) https://doi.org/10.1117/12.467659
Event: Symposium on Integrated Optoelectronic Devices, 2002, San Jose, California, United States

Abstract

P-type GaAs/AlGaAs quantum well infrared photodetectors (QWIP) represent a complementary technology to the well developed and already commercialized n-type GaAs/AlGaAs QWIP technology. Since n-QWIPs require grating couplings for normal incidence absorption, p-type GaAs/AlGaAs QWIPs have emerged as a viable alternative in some applications. In this paper, progress in optimizing the performance of p-type GaAs/AlGaAs QWIPs through modeling, growth, and characterization is described. Our approach begins with the theoretical design of p-QWIPs based on calculations of optical absorption. Next, samples are grown by MBE according to the theoretical designs and their characteristics measured. p-type QWIPs were optimized with respect to the well and barrier widths, alloy concentration, and dopant concentration; resonant cavity devices were also fabricated and the temperature dependent photoresponse was measured. Based on the progress to date, it is now possible to make some comparisons between the n- and p-type approaches. Further avenues for improvement of p-QWIP photoresponse are being explored by exploiting the rich physics of this coupled multi-band system.

Citation Download Citation

Frank Szmulowicz and Gail J. Brown "Whither P-type GaAs/AlGaAs QWIP?", Proc. SPIE 4650, Photodetector Materials and Devices VII, (21 May 2002); https://doi.org/10.1117/12.467659

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