Enhanced Purcell factor for nanoantennas supporting interfering resonances

Rémi Colom; Felix Binkowski; Fridtjof Betz; Yuri Kivshar; Sven Burger

doi:10.1103/PhysRevResearch.4.023189

Enhanced Purcell factor for nanoantennas supporting interfering resonances

Rémi Colom, Felix Binkowski, Fridtjof Betz, Yuri Kivshar, Sven Burger^*

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

12 Citations (Scopus)

Abstract

We study the effect of coupled resonances and quasibound states in the continuum (quasi-BICs) on the Purcell factor in dielectric resonant nanoantennas. We analyze numerically interfering resonances in a nanodisk with and without a substrate when the modes are coupled to an emitter localized inside the nanodisk, and we quantify the modal contributions to the Purcell factor also reconstructing the radiation patterns of the resonant system. It is revealed that the Purcell effect can be boosted substantially for a strong coupling of resonances in the quasi-BIC regime.

Original language	English
Article number	023189
Journal	Physical Review Research
Volume	4
Issue number	2
DOIs	https://doi.org/10.1103/PhysRevResearch.4.023189
Publication status	Published - Jun 2022

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abstract = "We study the effect of coupled resonances and quasibound states in the continuum (quasi-BICs) on the Purcell factor in dielectric resonant nanoantennas. We analyze numerically interfering resonances in a nanodisk with and without a substrate when the modes are coupled to an emitter localized inside the nanodisk, and we quantify the modal contributions to the Purcell factor also reconstructing the radiation patterns of the resonant system. It is revealed that the Purcell effect can be boosted substantially for a strong coupling of resonances in the quasi-BIC regime.",

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AU - Colom, Rémi

AU - Binkowski, Felix

AU - Betz, Fridtjof

AU - Kivshar, Yuri

AU - Burger, Sven

PY - 2022/6

Y1 - 2022/6

N2 - We study the effect of coupled resonances and quasibound states in the continuum (quasi-BICs) on the Purcell factor in dielectric resonant nanoantennas. We analyze numerically interfering resonances in a nanodisk with and without a substrate when the modes are coupled to an emitter localized inside the nanodisk, and we quantify the modal contributions to the Purcell factor also reconstructing the radiation patterns of the resonant system. It is revealed that the Purcell effect can be boosted substantially for a strong coupling of resonances in the quasi-BIC regime.

AB - We study the effect of coupled resonances and quasibound states in the continuum (quasi-BICs) on the Purcell factor in dielectric resonant nanoantennas. We analyze numerically interfering resonances in a nanodisk with and without a substrate when the modes are coupled to an emitter localized inside the nanodisk, and we quantify the modal contributions to the Purcell factor also reconstructing the radiation patterns of the resonant system. It is revealed that the Purcell effect can be boosted substantially for a strong coupling of resonances in the quasi-BIC regime.

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Enhanced Purcell factor for nanoantennas supporting interfering resonances

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