Observation of the Generalized Kerker Effect Mediated by Quasi-Bound States in the Continuum

Ze Jing; Shuangli Li; Siyuan Ouyang; Junjian Lu; Yueke Wang; Lujun Huang; Lin Li; Tian Sang

doi:10.1021/acs.nanolett.4c05421

Observation of the Generalized Kerker Effect Mediated by Quasi-Bound States in the Continuum

Ze Jing
, Shuangli Li
, Siyuan Ouyang
, Junjian Lu
, Yueke Wang
, Lujun Huang
, Lin Li^*
, Tian Sang^*

^*Corresponding author for this work

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

19 Scopus citations

Abstract

The generalized Kerker effect (GKE) arising from the interference of high-order multipoles has attracted more interest due to its direct correlation with various functionalities in nanophotonics. The realization of the GKE at oblique incidence is highly desired yet remains underexplored. Herein, we report the experimental observation of the GKE by leveraging quasi-bound states in the continuum (QBICs) supported by a silicon metasurface. The low-Q leaky mode resonance interacts with one of the high-Q QBICs under oblique incidence, leading to the formation of a hybrid magnetic quadrupole (MQ)-magnetic dipole (MD) mode. The amplitude of the hybrid MQ-MD mode can be precisely controlled to achieve an out-of-phase condition by varying the incident angle, resulting in a GKE under the second Kerker condition. Our results reveal that the QBICs associated with rich multipole resonances can provide a new paradigm for tailoring the GKE, suggesting important implications for advanced metadevices.

Original language	English
Pages (from-to)	522-528
Number of pages	7
Journal	Nano Letters
Volume	25
Issue number	1
DOIs	https://doi.org/10.1021/acs.nanolett.4c05421
State	Published - 8 Jan 2025
Externally published	Yes

Keywords

bound states in the continuum
generalized Kerker effect
higher multipoles
leaky mode resonance
oblique incidence

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10.1021/acs.nanolett.4c05421

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title = "Observation of the Generalized Kerker Effect Mediated by Quasi-Bound States in the Continuum",

abstract = "The generalized Kerker effect (GKE) arising from the interference of high-order multipoles has attracted more interest due to its direct correlation with various functionalities in nanophotonics. The realization of the GKE at oblique incidence is highly desired yet remains underexplored. Herein, we report the experimental observation of the GKE by leveraging quasi-bound states in the continuum (QBICs) supported by a silicon metasurface. The low-Q leaky mode resonance interacts with one of the high-Q QBICs under oblique incidence, leading to the formation of a hybrid magnetic quadrupole (MQ)-magnetic dipole (MD) mode. The amplitude of the hybrid MQ-MD mode can be precisely controlled to achieve an out-of-phase condition by varying the incident angle, resulting in a GKE under the second Kerker condition. Our results reveal that the QBICs associated with rich multipole resonances can provide a new paradigm for tailoring the GKE, suggesting important implications for advanced metadevices.",

keywords = "bound states in the continuum, generalized Kerker effect, higher multipoles, leaky mode resonance, oblique incidence",

author = "Ze Jing and Shuangli Li and Siyuan Ouyang and Junjian Lu and Yueke Wang and Lujun Huang and Lin Li and Tian Sang",

note = "Publisher Copyright: {\textcopyright} 2024 American Chemical Society.",

year = "2025",

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doi = "10.1021/acs.nanolett.4c05421",

language = "英语",

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T1 - Observation of the Generalized Kerker Effect Mediated by Quasi-Bound States in the Continuum

AU - Jing, Ze

AU - Li, Shuangli

AU - Ouyang, Siyuan

AU - Lu, Junjian

AU - Wang, Yueke

AU - Huang, Lujun

AU - Li, Lin

AU - Sang, Tian

PY - 2025/1/8

Y1 - 2025/1/8

N2 - The generalized Kerker effect (GKE) arising from the interference of high-order multipoles has attracted more interest due to its direct correlation with various functionalities in nanophotonics. The realization of the GKE at oblique incidence is highly desired yet remains underexplored. Herein, we report the experimental observation of the GKE by leveraging quasi-bound states in the continuum (QBICs) supported by a silicon metasurface. The low-Q leaky mode resonance interacts with one of the high-Q QBICs under oblique incidence, leading to the formation of a hybrid magnetic quadrupole (MQ)-magnetic dipole (MD) mode. The amplitude of the hybrid MQ-MD mode can be precisely controlled to achieve an out-of-phase condition by varying the incident angle, resulting in a GKE under the second Kerker condition. Our results reveal that the QBICs associated with rich multipole resonances can provide a new paradigm for tailoring the GKE, suggesting important implications for advanced metadevices.

AB - The generalized Kerker effect (GKE) arising from the interference of high-order multipoles has attracted more interest due to its direct correlation with various functionalities in nanophotonics. The realization of the GKE at oblique incidence is highly desired yet remains underexplored. Herein, we report the experimental observation of the GKE by leveraging quasi-bound states in the continuum (QBICs) supported by a silicon metasurface. The low-Q leaky mode resonance interacts with one of the high-Q QBICs under oblique incidence, leading to the formation of a hybrid magnetic quadrupole (MQ)-magnetic dipole (MD) mode. The amplitude of the hybrid MQ-MD mode can be precisely controlled to achieve an out-of-phase condition by varying the incident angle, resulting in a GKE under the second Kerker condition. Our results reveal that the QBICs associated with rich multipole resonances can provide a new paradigm for tailoring the GKE, suggesting important implications for advanced metadevices.

KW - bound states in the continuum

KW - generalized Kerker effect

KW - higher multipoles

KW - leaky mode resonance

KW - oblique incidence

UR - https://www.scopus.com/pages/publications/85212665315

U2 - 10.1021/acs.nanolett.4c05421

DO - 10.1021/acs.nanolett.4c05421

M3 - 文章

C2 - 39698843

AN - SCOPUS:85212665315

SN - 1530-6984

VL - 25

SP - 522

EP - 528

JO - Nano Letters

JF - Nano Letters

IS - 1

ER -

Observation of the Generalized Kerker Effect Mediated by Quasi-Bound States in the Continuum

Abstract

Keywords

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