- Tytuł:
- Design and performance of dual-band MWIR/LWIR focal plane arrays based on a type-II superlattice nBn structure
- Autorzy:
-
Lee, Hyun-Jin
Eom, Jun Ho
Jung, Hyun Chul
Kang, Ko-Ku
Ryu, Seong Min
Jang, Ahreum
Kim, Jong Gi
Kim, Young Ho
Jung, Han
Kim, Sun Ho
Choi, Jong Hwa - Powiązania:
- https://bibliotekanauki.pl/articles/2204217.pdf
- Data publikacji:
- 2023
- Wydawca:
- Polska Akademia Nauk. Stowarzyszenie Elektryków Polskich
- Tematy:
-
InAs/GaSb type-II superlattice
dualband detector
dark current
spectral quantum efficiency
noise equivalent temperature difference - Opis:
- Dual-band infrared detector, which acquires more image information than single-band detectors, has excellent detection, recognition, and identification capabilities. The dual-band detector can have two bumps to connect with each absorber layer, but it is difficult to implement small pitch focal plane arrays and its fabrication process is complicated. Therefore, the most effective way for a dual-band detector is to acquire each band by biasselectable with one bump. To aim this, a dual-band MWIR/LWIR detector based on an InAs/GaSb type-II superlattice nBn structure was designed and its performance was evaluated in this work. Since two absorber layers were separated by the barrier layer, each band can be detected by bias-selectable with one bump. The fabricated dual-band device exhibited the dark current and spectral response characteristics of MWIR and LWIR bands under negative and positive bias, respectively. Spectral crosstalk that is a major issue in dualband detectors was also improved. Finally, a 20 µm pitch 640 x 512 dual-band detector was fabricated, and both MWIR and LWIR images exhibited an average noise equivalent temperature difference of 30 mK or less at 80 K.
- Źródło:
-
Opto-Electronics Review; 2023, 31, Special Issue; art. no. e144560
1230-3402 - Pojawia się w:
- Opto-Electronics Review
- Dostawca treści:
- Biblioteka Nauki
Artykuł