Design of bull's-eye optical cavity toward efficient quantum media conversion using gate-defined quantum dot

Sangmin Ji, Takeyoshi Tajiri, Haruki Kiyama, Akira Oiwa, Satoshi Iwamoto

研究成果: ジャーナルへの寄稿学術誌査読

7 被引用数 (Scopus)

抄録

Gate-defined quantum dots (GQDs) are promising solid-state quantum structures for realizing spin-photon quantum interfaces that convert the arbitrary polarization state of a photon to the corresponding spin state of an electron. For an efficient conversion, the optical absorption of GQDs must be enhanced without polarization dependence. In this study, we design an optical cavity based on the bull's-eye structure. The symmetry of the structure allows the cavity to support doubly degenerate modes. We numerically demonstrate that for an incident light of any polarization state, the optical absorption of a GQD embedded in a bull's-eye cavity is equally enhanced. A 450× absorption enhancement is obtained in an experimentally feasible structure. We elucidate the physical origins of this significant enhancement by analyzing the light absorption of GQDs using coupled mode theory. Our results indicate the potential of the bull's-eye cavity structure as a building block for efficient quantum media conversion using GQDs.

本文言語英語
論文番号102003
ジャーナルJapanese journal of applied physics
60
10
DOI
出版ステータス出版済み - 10月 2021
外部発表はい

!!!All Science Journal Classification (ASJC) codes

  • 工学一般
  • 物理学および天文学一般

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