Tuning of internal gain, dark current and cutoff wavelength of UV photodetectors using quasi-alloy of BGaN-GaN and BGaN-AlN superlattices

J. P. Salvestrini; A. Ahaitouf; H. Srour; S. Gautier; T. Moudakir; B. Assouar; A. Ougazzaden

doi:10.1117/12.914800

20 January 2012 Tuning of internal gain, dark current and cutoff wavelength of UV photodetectors using quasi-alloy of BGaN-GaN and BGaN-AlN superlattices

J. P. Salvestrini, A. Ahaitouf, H. Srour, S. Gautier, T. Moudakir, B. Assouar, A. Ougazzaden

Author Affiliations +

Proceedings Volume 8268, Quantum Sensing and Nanophotonic Devices IX; 82682S (2012) https://doi.org/10.1117/12.914800
Event: SPIE OPTO, 2012, San Francisco, California, United States

Abstract

Metal-semiconductor-metal solar blind ultraviolet photodetectors have been fabricated using both BGaN-GaN and BGaN-AlN superlattices as active layers. A high internal gain (up to 3 × 10⁴ for optical power in the nW range) is obtained with a highly reduced dark current thanks to the boron incorporation. In the high optical power regime (W range), the time response is in the nanosecond range, which is much smaller than that of GaNand ZnO-based ultraviolet photodetectors. Moreover, the boron incorporation in GaN material allows the tuning of the cutoff wavelength.

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J. P. Salvestrini, A. Ahaitouf, H. Srour, S. Gautier, T. Moudakir, B. Assouar, and A. Ougazzaden "Tuning of internal gain, dark current and cutoff wavelength of UV photodetectors using quasi-alloy of BGaN-GaN and BGaN-AlN superlattices", Proc. SPIE 8268, Quantum Sensing and Nanophotonic Devices IX, 82682S (20 January 2012); https://doi.org/10.1117/12.914800

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