Quantum dot photoconductive antenna-based compact setups for terahertz spectroscopy and imaging

Andrei Gorodetsky; Amit Yadav; Semyon V. Smirnov; Natalia Bazieva; Edik U. Rafailov

doi:10.1117/12.2567630

20 August 2020 Quantum dot photoconductive antenna-based compact setups for terahertz spectroscopy and imaging

Andrei Gorodetsky, Amit Yadav, Semyon V. Smirnov, Natalia Bazieva, Edik U. Rafailov

Proceedings Volume 11499, Terahertz Emitters, Receivers, and Applications XI; 1149905 (2020) https://doi.org/10.1117/12.2567630
Event: SPIE Optical Engineering + Applications, 2020, Online Only

Abstract

We present the overview of the results on the development of compact THz setups based on the quantum dot photoconductive antennas obtained during the past five years. We demonstrate the potential of the InAs/GaAs Quantum-Dot based setups to become an efficient approach to compact, room-temperature operating CW and pulsed terahertz setups for spectroscopy and imaging. We describe the photoelectronic processes in quantum dot substrates and reveal the role of quantum dots in free carrier lifetimes and the formation of the ultrafast photocurrent. We demonstrate the operation mode of the proposed antennas in pulsed and CW regimes under resonant (carriers are excited only inside the quantum dots) and off-resonant (carriers are excited in the bulk volume of the substrate) pumps with compact quantum dot semiconductor lasers. The results allow suggesting the quantum dot based setups as a new approach to field condition compact THz sources for imaging and spectroscopy.

Conference Presentation

Citation Download Citation

Andrei Gorodetsky, Amit Yadav, Semyon V. Smirnov, Natalia Bazieva, and Edik U. Rafailov "Quantum dot photoconductive antenna-based compact setups for terahertz spectroscopy and imaging", Proc. SPIE 11499, Terahertz Emitters, Receivers, and Applications XI, 1149905 (20 August 2020); https://doi.org/10.1117/12.2567630

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