Absorption Reduction of Large Purcell Enhancement Enabled by Topological State-Led Mode Coupling

Qian, Zhiyuan; Li, Zhichao; He, Hao; Shan, Li; Zhang, Qi; Dong, Jian‐Wen; Gong, Qihuang; Gu, Ying

doi:10.1103/physrevlett.126.023901

Cited by 26 publications

(28 citation statements)

References 57 publications

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“…As shown in figure 4(a), it can be observed that as the air-hole radius r gradually decreases (from 150 nm to 60 nm), the PF gradually increases. When r = 60 nm, it almost reaches 10 5 which is higher than many current research systems [18]. In figure 4(b), the PF and Q-factor are given with respect to the asymmetry parameter α.…”

Section: Resultsmentioning

confidence: 76%

“…In order to facilitate the enhancement of spontaneous emission, these common micro-or nanostructures, including whispering gallery microcavities [5,6], photonic crystals defect cavities [7,8], surface plasmon polaritons nanostructures [9][10][11], dielectric nanoparticles [12][13][14], metamaterials (metasurfaces) [15][16][17], have been widely used. However, the Purcell factor (PF), a quantitative description of the enhancement of spontaneous emission, is usually within the range of 10-10 5 due to scattering loss and absorption loss in these structures [4,18]. To date, some attempts are also made to further improve the PF.…”

Section: Introductionmentioning

confidence: 99%

“…To date, some attempts are also made to further improve the PF. For example, Qian et al achieved a large PF of 2 × 10 4 by employing the mechanism of topological state-led mode coupling recently [18].…”

Section: Introductionmentioning

confidence: 99%

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Strong Purcell effect of magnetic quasi-BICs in the dielectric metasurface

Huang

Chen

et al. 2023

New J. Phys.

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The ultra-strong light field trapping in micro- and nanostructures, derived from optical bound states in the continuum (BICs), provides a new platform for the facilitation of light-matter interactions. In this work, we numerically study the spontaneous emission enhancement of dipole quantum emitters with the use of magnetic quasi-BICs metasurfaces. It is found that an ultrahigh Purcell factor (>10⁵) can be easily achieved when the asymmetry parameter is decreased. In theory, an infinite Purcell factor may be emerged due to the infinite Q-factor at the BICs state. In addition, the Purcell factor exhibits a strong dependence on the polarization direction of dipole emitter and the local field distribution in the metasurface. Finally, the photoluminescence enhancement for different perturbation parameters is calculated to confirm the strong Purcell effect in the quasi-BICs metasurface. These results show that the magnetic dipole BICs mode holds an enormous potential in manipulating spontaneous emission.

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Section: Resultsmentioning

confidence: 76%

Section: Introductionmentioning

confidence: 99%

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Strong Purcell effect of magnetic quasi-BICs in the dielectric metasurface

Huang

Chen

et al. 2023

New J. Phys.

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“…3E , we show the calculated Purcell factor distribution in comparison with the electric field intensity | E | 2 profile associated with the JR state. We use the radiative power comparison method ( 30 ) in this calculation. The calculated Purcell factor follows the | E | 2 profile as predicted by Fermi’s golden rule, and its peak value at the junction goes beyond 10, implying that the emission toward the JR state within the mode field diameter is about five times stronger on average than that into the isotropic free-space radiation.…”

Section: Resultsmentioning

confidence: 99%

Topological beaming of light

et al. 2022

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Nanophotonic light emitters are key components in numerous application areas because of their compactness and versatility. Here, we propose a topological beam emitter structure that takes advantage of submicrometer footprint size, small divergence angle, high efficiency, and adaptable beam shaping capability. The proposed structure consists of a topological junction of two guided-mode resonance gratings inducing a leaky Jackiw-Rebbi state resonance. The leaky Jackiw-Rebbi state leads to in-plane optical confinement with funnel-like energy flow and enhanced emission probability, resulting in highly efficient optical beam emission. In addition, the structure allows adaptable beam shaping for any desired positive definite profiles by means of Dirac mass distribution control, which can be directly encoded in lattice geometry parameters. Therefore, the proposed approach provides highly desirable properties for efficient micro–light emitters and detectors in various applications including display, solid-state light detection and ranging, laser machining, label-free sensors, optical interconnects, and telecommunications.

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“…[34][35][36] As a result, the figure of merit Q/V of the above topological cavities is not high, which extremely limits the strength of light-matter interaction and restricts the applications of topological photonic cavities in certain areas, such as Purcell enhancement, [51,52] strong coupling, [14,15] nonlinear quantum optics, [105,106] . [139] Based on this mechanism, an obvious absorption reduction in the spontaneous emission spectra occurs due to the near-field deformation around the antenna induced by the edge state. Moreover, the large Purcell factor reaches more than 10 4 γ 0 due to the plasmon antenna with ultra-small mode volume [see Fig.…”

Section: Topological Hybrid Nano-cavitymentioning

confidence: 99%

Photonic-plasmonic hybrid microcavities: Physics and applications*

Zhang¹,

Zhao²,

Liu³

et al. 2021

Chinese Phys. B

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Photonic-plasmonic hybrid microcavities, which possess a higher figure of merit Q/V (the ratio of quality factor to mode volume) than that of pure photonic microcavities or pure plasmonic nano-antennas, play key roles in enhancing light–matter interaction. In this review, we summarize the typical photonic-plasmonic hybrid microcavities, such as photonic crystal microcavities combined with plasmonic nano-antenna, whispering gallery mode microcavities combined with plasmonic nano-antenna, and Fabry–Perot microcavities with plasmonic nano-antenna. The physics and applications of each hybrid photonic-plasmonic system are illustrated. The recent developments of topological photonic crystal microcavities and topological hybrid nano-cavities are also introduced, which demonstrates that topological microcavities can provide a robust platform for the realization of nanophotonic devices. This review can bring comprehensive physical insights of the hybrid system, and reveal that the hybrid system is a good platform for realizing strong light–matter interaction.

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Absorption Reduction of Large Purcell Enhancement Enabled by Topological State-Led Mode Coupling

Cited by 26 publications

References 57 publications

Strong Purcell effect of magnetic quasi-BICs in the dielectric metasurface

Strong Purcell effect of magnetic quasi-BICs in the dielectric metasurface

Topological beaming of light

Photonic-plasmonic hybrid microcavities: Physics and applications*

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