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Nanomaterials 2019, 9(3), 394; https://doi.org/10.3390/nano9030394

Full Counting Statistics of Electrons through Interaction of the Single Quantum Dot System with the Optical Field

1
Guangdong Research Center of Photoelectric Detection Instrument Engineering Technology, and Guangdong Laboratory of Quantum Engineering and Quantum Materials, School of physics and Telecommunication Engineering, South China Normal University, Guangzhou 510006, China
2
Department of Electronic Information Engineering, Guangzhou College of Technology and Business, Foshan 528138, China
3
Guangzhou Key Laboratory for Special Fiber Photonic Devices, Laboratory of Nanophotonic Functional Materials and Devices, School of Information and Optoelectronic Science and Engineering, South China Normal University, Guangzhou 510006, China
*
Author to whom correspondence should be addressed.
Received: 15 January 2019 / Revised: 20 February 2019 / Accepted: 5 March 2019 / Published: 8 March 2019
(This article belongs to the Special Issue Applications of Quantum Dots)
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Abstract

In this paper, using the particle-number-resolved master equation, the properties of full counting statistics (FCS) are investigated for a single quantum dot (QD) system interacting with optical fields in the thermal state, Fock state, coherent state, and coherent state with random phase. In these diverse quantum states of optical fields, average tunneling currents have different step shoulder heights at a lower bias voltage with the same light intensity, and a staircase-shaped current can be induced unexpectedly in vacuum state optical field. The characteristics of the Fano factor and skewness in the coherent state differ from those in all of the other cases. For avalanche-like transport at a lower bias voltage, the mechanism is a dynamical channel blockade in a moderate electron–photon interaction regime. There is a pronounced negative differential conductance that results from tuning the phase of the coherent state optical field in a symmetric QD system. View Full-Text
Keywords: quantum dot; full counting statistics; particle-number-resolved master equation; optical fields quantum dot; full counting statistics; particle-number-resolved master equation; optical fields
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Liu, W.; Wang, F.; Tang, Z.; Liang, R. Full Counting Statistics of Electrons through Interaction of the Single Quantum Dot System with the Optical Field. Nanomaterials 2019, 9, 394.

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