Effective Coupling of a Topological Corner-state Nanocavity to Various Plasmon Nanoantennas

Na Ma; Ping Jiang; You Tao Zeng; Xiao Zhen Qiao; Xian Feng Xu

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자료유형: 학술저널

저자정보: Na Ma (China University of Petroleum (East China)) Ping Jiang (China University of Petroleum (East China)) You Tao Zeng (China University of Petroleum (East China)) Xiao Zhen Qiao (China University of Petroleum (East China)) Xian Feng Xu (China University of Petroleum (East China))

저널정보: 한국광학회 Current Optics and Photonics Current Optics and Photonics Vol.6 No.5

발행연도: 2022.10

수록면: 497 - 505 (9page)

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Topological photonic nanocavities are considered to possess outstanding optical performance, and provide new platforms for realizing strong interaction between light and matter, due to their robustness to impurities and defects. Here hybrid plasmonic topological photonic nanocavities are proposed, by embedding various plasmon nanoantennas such as gold nanospheres, cylinders, and rectangles in a topological photonic crystal corner-state nanocavity. The maximum quality factor Q and minimum effective mode volume Veff of these hybrid nanocavities can reach the order of 10⁴ and 10−4 (λ /n)³ respectively, and the high figures of merit Q/Veff for all of these hybrid nanocavites are stable and on the order of 10⁵ (λ /n)−3. The relative positions of the plasmon nanoantennas will influence the coupling strength between the plasmon structures and the topological nanocavity. The hybrid nanocavity with gold nanospheres possesses much higher Q, but relatively large Veff. The presence of a gold rectangular structure can confine more electromagnetic energy within a smaller space, since its Veff is smallest, although Q is lowest among these structures. This work provides an outstanding platform for cavity quantum electrodynamics and has a wide range of applications in topological quantum light sources, such as single-photon sources and nanolasers.

#Cavity quantum electrodynamics #Plasmon nanoantennas #Purcell enhancement #Topological photonic nanocavity #Topological protection

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