We present the design for a novel type of dual-band photodetector in the thermal infrared spectral range, the Optically Controlled Dual-band quantum dot Infrared Photodetector (OCDIP). This concept is based on a quantum dot ensemble with a unimodal size distribution, whose absorption spectrum can be controlled by optically injected carriers. An external pumping laser varies the electron density in the QDs, permitting to control the available electronic transitions and thus the absorption spectrum. We grew a test sample which we studied by AFM and photoluminescence. Based on the experimental data, we simulated the infrared absorption spectrum of the sample, which showed two absorption bands at 5.85 μm and 8.98 μm depending on the excitation power.

Vichi, S., Bietti, S., Basso Basset, F., Tuktamyshev, A., Fedorov, A., Sanguinetti, S. (2022). Optically controlled dual-band quantum dot infrared photodetector. NANOMATERIALS AND NANOTECHNOLOGY, 12 [10.1177/18479804221085790].

Optically controlled dual-band quantum dot infrared photodetector

Stefano Vichi
;
Sergio Bietti;Francesco Basso Basset;Artur Tuktamyshev;Stefano Sanguinetti
2022

Abstract

We present the design for a novel type of dual-band photodetector in the thermal infrared spectral range, the Optically Controlled Dual-band quantum dot Infrared Photodetector (OCDIP). This concept is based on a quantum dot ensemble with a unimodal size distribution, whose absorption spectrum can be controlled by optically injected carriers. An external pumping laser varies the electron density in the QDs, permitting to control the available electronic transitions and thus the absorption spectrum. We grew a test sample which we studied by AFM and photoluminescence. Based on the experimental data, we simulated the infrared absorption spectrum of the sample, which showed two absorption bands at 5.85 μm and 8.98 μm depending on the excitation power.
Articolo in rivista - Articolo scientifico
droplet epitaxy; Infrared photodetector; quantum dot;
English
31-mar-2022
2022
12
open
Vichi, S., Bietti, S., Basso Basset, F., Tuktamyshev, A., Fedorov, A., Sanguinetti, S. (2022). Optically controlled dual-band quantum dot infrared photodetector. NANOMATERIALS AND NANOTECHNOLOGY, 12 [10.1177/18479804221085790].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/422078
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