CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES |
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Quantization Scheme of Surface Plasmon Polaritons in Two-Dimensional Helical Liquids |
Pengfei Suo, Li Mao**, Hongxing Xu** |
School of Physics and Technology, Wuhan University, Wuhan 430072
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Cite this article: |
Pengfei Suo, Li Mao, Hongxing Xu 2020 Chin. Phys. Lett. 37 017801 |
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Abstract The collective modes of two-dimensional helical electron gases interacting with light have been studied in an extended random phase approximation. An inverse operator transformation that interprets electron oscillations and photons with quasi particles is developed. Because photons are initially included in the model, one can directly derive and compare the static and radiation (or vector) fields for the excited collective modes. Unlike the traditional quantization scheme that the electron oscillation's contribution is totally hidden in the dielectric function, we can directly investigate their roles when the collective modes interact with other particles. As an example, we find an additional term which plays an important role at small distance arising from electron exchanging effect when the collective modes couple to emitters.
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Received: 29 October 2019
Published: 22 November 2019
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PACS: |
78.67.-n
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(Optical properties of low-dimensional, mesoscopic, and nanoscale materials and structures)
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03.70.+k
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(Theory of quantized fields)
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71.10.-w
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(Theories and models of many-electron systems)
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Fund: Supported by the National Basic Research Program of China under Grant No. 2015CB932401, the National Key R&D Program of China under Grant Nos. 2017YFA0205800 and 2017YFA0303402, and the National Natural Science Foundation of China under Grant Nos. 91850207 and 11344009. |
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