Open AccessGradual funnel photon trapping enhanced InAs/GaSb type-II superlattice infrared detector
Author(s) -
Lei Xiao,
Zhu Peng,
g Li,
Faran Chang,
Haofei Shi,
Xingzhan Wei,
Wen Xiong,
Tai Sun,
Guo Wei Wang
Publication year - 2022
Publication title -
optics express
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.468812
Subject(s) - responsivity , superlattice , optoelectronics , materials science , dark current , optics , detector , infrared , absorption (acoustics) , trapping , photodetector , specific detectivity , indium arsenide , noise (video) , physics , gallium arsenide , ecology , artificial intelligence , computer science , image (mathematics) , biology
InAs/GaSb type-II superlattice materials have attracted in the field of infrared detection due to their high quality, uniformity and stability. The performance of InAs/GaSb type-II superlattice detector is limited by dark noise and light response. This work reports a gradual funnel photon trapping (GFPT) structure enabling the light trapping in the T2SL detector absorption area. The GFPT detector exhibits an efficient broadband responsivity enhancement of 30% and a darker current noise reduction of 3 times. It has excellent passivated by atomic layer deposition and achieves a high detectivity of 1.51 × 10 11 cm Hz 1/2 at 78 K.