Carrier lifetime measurements in InAs/GaSb strained layer superlattice structures

Stefan P. Svensson; Dmitry Donetsky; Ding Wang; Patrick Maloney; Gregory Belenky

doi:10.1117/12.849514

3 May 2010 Carrier lifetime measurements in InAs/GaSb strained layer superlattice structures

Stefan P. Svensson, Dmitry Donetsky, Ding Wang, Patrick Maloney, Gregory Belenky

Proceedings Volume 7660, Infrared Technology and Applications XXXVI; 76601V (2010) https://doi.org/10.1117/12.849514
Event: SPIE Defense, Security, and Sensing, 2010, Orlando, Florida, United States

Abstract

Minority carrier lifetime, photoluminescence (PL), and interband absorption in midinfrared range of spectra were measured in InAs/GaSb strained-layer superlattices (SLS) grown by molecular beam epitaxy (MBE) on GaSb substrates. The carrier lifetime was determined by time-resolved PL (TRPL) and from analysis of PL response to sine-wavemodulated excitation. Studies of the PL kinetics in the frequency domain allowed for direct lifetime measurements in SLS structures with an excess carrier concentration level of 3.5×10¹⁵ cm^-3. The minority carrier lifetime at T = 77 K was obtained from the dependence of the carrier lifetime on excitation power. SLS structures with similar absorption wavelengths but with different InAs and GaSb layer thicknesses and with different amounts of strain were investigated and compared with mercury cadmium telluride (MCT) samples. No apparent trend was seen in structures with different number of interfaces per unit length. All SLS lifetime values measured so far are more than an order of magnitude lower than those of MCT.

Citation Download Citation

Stefan P. Svensson, Dmitry Donetsky, Ding Wang, Patrick Maloney, and Gregory Belenky "Carrier lifetime measurements in InAs/GaSb strained layer superlattice structures", Proc. SPIE 7660, Infrared Technology and Applications XXXVI, 76601V (3 May 2010); https://doi.org/10.1117/12.849514

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