Bulletin of the American Physical Society
APS March Meeting 2023
Volume 68, Number 3
Las Vegas, Nevada (March 5-10)
Virtual (March 20-22); Time Zone: Pacific Time
Session JJ08: V: Superlattices and Other Artificially Structured Materials
3:00 PM–4:48 PM,
Monday, March 20, 2023
Room: Virtual Room 8
Sponsoring
Unit:
DCMP
Chair: Jingsong Zhang, University of California, Riverside
Abstract: JJ08.00003 : Structural comparisons of dark currents through superlattice infrared photodetectors in the LWIR region*
3:24 PM–3:36 PM
Presenter:
Pooja Kawde
(CRNTS,IITB)
Authors:
Bhaskaran Muralidharan
(Indian Institute of Technology Bombay)
Pooja Kawde
(CRNTS,IITB)
Anuja Singh
(Department of Electrical Engineering, IITB)
Swarnadip Mukherjee
(Micron Technology, India)
due to their tuneable bandgap and optoelectronic characteristics [1]. The requirement of cryogenic cooling for IR
detectors is a significant barrier inhibiting their broad applications. Consequently, the study of dark current is
crucial for photodetectors. We compare dark currents of two structures: the 14 monolayer (ML) /7 monolayer
(ML) and the 12ML/2ML InAs/GaSb type II superlattice (SL) p-i-n photodetector. The structures are simulated
using Sentaurus TCAD in the reverse bias voltage range at a temperature of 77K. We observe lower values of
generation recombination and trap assisted tunnelling current density through 12ML/2ML SL p-i-n detector
than 14ML/7ML SL p-i-n detector. Band-to-band tunnelling current is lower for 14ML/7ML SL p-i-n detector
because of higher tunnelling mass [1] of 14ML/7ML SL.
[1] Delmas, M,A comprehensive set of simulation tools to model and design high-performance Type-II InAs/GaSb superlattice infrared
detectors,Quantum Sensing and Nano Electronics and Photonics XVI (Vol. 10926, pp. 29-39). SPIE
*The authors acknowledge the funding from ISRO under ISRO-IITB Space Technology Cell.
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