Suppressing Spectral Crosstalk in Dual-Band Long- Wavelength Infrared Photodetectors With Monolithically Integrated Air-Gapped Distributed Bragg Reflectors
| Autor: | Arash Dehzangi, Yiyun Zhang, Manijeh Razeghi, Abbas Haddadi, Romain Chevallier |
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| Rok vydání: | 2019 |
| Předmět: |
Physics
Infrared business.industry Photodetector 02 engineering and technology Stopband Photodetection Condensed Matter Physics Atomic and Molecular Physics and Optics Wavelength 020210 optoelectronics & photonics Antimonide 0202 electrical engineering electronic engineering information engineering Optoelectronics Multi-band device Electrical and Electronic Engineering Photonics business |
| Zdroj: | IEEE Journal of Quantum Electronics. 55:1-6 |
| ISSN: | 1558-1713 0018-9197 |
| DOI: | 10.1109/jqe.2018.2882808 |
| Popis: | Antimonide-based type-II superlattices (T2SLs) have made possible the development of high-performance infrared cameras for use in a wide variety of thermal imaging applications, many of which could benefit from dual-band imaging. The performance of this material system has not reached its limits. One of the key issues in dual-band infrared photodetection is spectral crosstalk. In this paper, air-gapped distributed Bragg reflectors (DBRs) have been monolithically integrated between the two channels in long-/very long-wavelength dual-band InAs/InAs1– x Sb x /AlAs1– x Sb x -based T2SLs photodetectors to suppress the spectral crosstalk. This air-gapped DBR has achieved a significant spectral suppression in the 4.5–7.5 $\mu \text{m}$ photonic stopband while transmitting the optical wavelengths beyond $7.5~\mu \text{m}$ , which is confirmed by theoretical calculations, numerical simulation, and experimental results. |
| Databáze: | OpenAIRE |
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