https://doi.org/10.1140/epjb/s10051-025-01017-x
Research – Mesoscopic and Nanoscale Systems
Tunable routing properties of single photon interacting with two quantum dots in a quantum router with the工-type coupled cavity waveguide system
1
Department of Physics, Institute of Theoretical Physics, University of Science and Technology Beijing, 100083, Beijing, China
2
School of Energy and Environmental Engineering, University of Science and Technology Beijing, 100083, Beijing, China
3
Faculty of Physics, Kim Il Sung University, Pyongyang, Democratic People’s Republic of Korea
4
Faculty of Material Science, Kim Il Sung University, Pyongyang, Democratic People’s Republic of Korea
5
Faculty of Electronics, Kim Chaek University of Technology, Pyongyang, Democratic People’s Republic of Korea
6
Faculty of Economics, Kim Il Sung University, Pyongyang, Democratic People’s Republic of Korea
a
mcko0302@163.com
b
nc.kim@ryongnamsan.edu.kp
Received:
27
March
2025
Accepted:
19
June
2025
Published online:
27
August
2025
A theoretical model of 工-shaped coupled-cavity waveguide with two quantum dots is proposed to realize the single photon router, where the two quantum dots are embedded in two nodes of two infinite coupled-cavity and a finite coupled-cavity waveguide respectively. Based on the discrete scattering equations, the routing properties such as transmission, reflection, and the transfer rate of the incident single photons are theoretically investigated. It is found that they can be controlled by various parameters such as the coupling strength between two quantum dots and three coupled-cavity waveguides, the transition energies of two quantum dots, wave vector, and the energy of the incident single photons, etc. Especially, when 
, in case of 
,the incident single photons have two symmetric peaks with relative to the resonant energy, but in case of 
, there appears only one transfer peak with blue or red shift due to the quantum interference between the two quantum dots. The tunable routing properties of the single photons in the 工-shape quantum router might have potential applications for future quantum devices.
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© The Author(s), under exclusive licence to EDP Sciences, SIF and Springer-Verlag GmbH Germany, part of Springer Nature 2025
Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.
