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Voltage-Tunable Mid- and Long-Wavelength Dual-Band Infrared Photodetector Based on Hybrid Self-Assembled and Sub-Monolayer Quantum Dots

1,†, 2 and 1,*
1
Department of Electrical and Computer Engineering, University of Massachusetts Lowell, One University Avenue, Lowell, MA 01854, USA
2
Department of Physics, Stonehill College, 320 Washington Street, Easton, MA 02357, USA
*
Author to whom correspondence should be addressed.
Current Address: Department of Mechanical Engineering, University of Colorado Boulder, Boulder, CO 80309, USA.
Micromachines 2019, 10(1), 4; https://doi.org/10.3390/mi10010004
Received: 27 November 2018 / Revised: 13 December 2018 / Accepted: 17 December 2018 / Published: 22 December 2018
(This article belongs to the Special Issue Infrared Nanophotonics: Materials, Devices, and Applications)
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Abstract

In this paper, we report a mid-wave infrared (MWIR) and long-wave infrared (LWIR) dual-band photodetector capable of voltage-controllable detection band selection. The voltage-tunable dual-band photodetector is based on the multiple stacks of sub-monolayer (SML) quantum dots (QDs) and self-assembled QDs. By changing the photodetector bias voltages, one can set the detection band to be MWIR, or LWIR or both with high photodetectivity and low crosstalk between the bands. View Full-Text
Keywords: submonolayer quantum dots; self-assembled quantum dot; dual-band midwave and longwave infrared photodetector; voltage tunable detection spectrum submonolayer quantum dots; self-assembled quantum dot; dual-band midwave and longwave infrared photodetector; voltage tunable detection spectrum
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Zhai, Y.; Gu, G.; Lu, X. Voltage-Tunable Mid- and Long-Wavelength Dual-Band Infrared Photodetector Based on Hybrid Self-Assembled and Sub-Monolayer Quantum Dots. Micromachines 2019, 10, 4.

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