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Interparticle Coupling Effects of Two Quantum Dots System on the Transport Properties of a Single Plasmon

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Abstract

Transport properties of a single plasmon interacting with two quantum dots (QDs) system coupled to one-dimensional surface plasmonic waveguide are investigated theoretically via the real-space approach. We mainly focus on the coupling effects of the two QDs on the transmission properties of a single incident plasmon. We demonstrated that switching of a single plasmon can be achieved by controlling the interparticle distance, the interparticle coupling strength, and the QD-waveguide coupling strength, as well as spectral detuning. We also showed that the coupling between the continuum excitations and the discrete excitations results in the Fano-type transmission spectrum. The transport properties of a single plasmon interacting with such a two direct coupled QDs system could find the applications in the design of plasmonic nanodevices, such as single photon switching and nanomirrors, and in quantum information processing.

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Acknowledgements

This work was supported by the National Program on Key Science Research of DPR of Korea (Grant No. 131-00). This work was also supported by the National Program on Key Science Research of China (2011CB922201) and the NSFC (11174229, 11204221, 11374236, and 11404410) and the Foundation of Talent Introduction of Central South University of Forestry and Technology (104-0260).

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Authors and Affiliations

  1. Faculty of Physics, Kim II Sung University, Pyongyang, Democratic People’s Republic of Korea

    Nam-Chol Kim, Myong-Chol Ko, Song-Il Choe, Chol-Jong Jang & Gwang-Jin Kim

  2. School of Physics and Technology, Wuhan University, Wuhan, 430072, China

    Nam-Chol Kim, Zhong-Hua Hao & Qu-Quan Wang

  3. Institute of Mathematics and Physics, Central South University of Forestry and Technology, Changsha, 410004, China

    Jian-Bo Li

  4. The Institute for Advanced Studies, Wuhan University, Wuhan, 430072, China

    Qu-Quan Wang

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  1. Nam-Chol Kim
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  2. Myong-Chol Ko
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  3. Song-Il Choe
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  4. Chol-Jong Jang
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  5. Gwang-Jin Kim
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Correspondence to Nam-Chol Kim or Qu-Quan Wang.

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Kim, NC., Ko, MC., Choe, SI. et al. Interparticle Coupling Effects of Two Quantum Dots System on the Transport Properties of a Single Plasmon. Plasmonics 13, 1089–1095 (2018). https://doi.org/10.1007/s11468-017-0608-z

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  • DOI: https://doi.org/10.1007/s11468-017-0608-z

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