High-Q Localized States in Finite Arrays of Subwavelength Resonators

Danil F. Kornovan; Roman S. Savelev; Yuri Kivshar; Mihail I. Petrov

doi:10.1021/acsphotonics.1c01262

High-Q Localized States in Finite Arrays of Subwavelength Resonators

Danil F. Kornovan^*, Roman S. Savelev, Yuri Kivshar^*, Mihail I. Petrov^*

^*Corresponding author for this work

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

18 Citations (Scopus)

Abstract

We uncover how to achieve giant Q-factors in finite-length periodic arrays of subwavelength optical resonators. The underlying physics is based on interference between the band-edge mode and a standing mode in the array, and it leads to the formation of spatially localized states with dramatically suppressed radiative losses. We demonstrate this concept for an array of N dipoles with simultaneous cancellation of multipoles up to N-th order and the Q-factor growing as Q ∝ Nα, where α ≳ 6.88. We study a realistic array of nanoparticles (N ≲ 37) supporting the magnetic dipole Mie resonances with the enhanced Purcell factor (∼7600) achieved by tuning the array parameters.

Original language	English
Pages (from-to)	3627-3632
Number of pages	6
Journal	ACS Photonics
Volume	8
Issue number	12
DOIs	https://doi.org/10.1021/acsphotonics.1c01262
Publication status	Published - 15 Dec 2021

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abstract = "We uncover how to achieve giant Q-factors in finite-length periodic arrays of subwavelength optical resonators. The underlying physics is based on interference between the band-edge mode and a standing mode in the array, and it leads to the formation of spatially localized states with dramatically suppressed radiative losses. We demonstrate this concept for an array of N dipoles with simultaneous cancellation of multipoles up to N-th order and the Q-factor growing as Q ∝ Nα, where α ≳ 6.88. We study a realistic array of nanoparticles (N ≲ 37) supporting the magnetic dipole Mie resonances with the enhanced Purcell factor (∼7600) achieved by tuning the array parameters.",

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AU - Savelev, Roman S.

AU - Kivshar, Yuri

AU - Petrov, Mihail I.

PY - 2021/12/15

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N2 - We uncover how to achieve giant Q-factors in finite-length periodic arrays of subwavelength optical resonators. The underlying physics is based on interference between the band-edge mode and a standing mode in the array, and it leads to the formation of spatially localized states with dramatically suppressed radiative losses. We demonstrate this concept for an array of N dipoles with simultaneous cancellation of multipoles up to N-th order and the Q-factor growing as Q ∝ Nα, where α ≳ 6.88. We study a realistic array of nanoparticles (N ≲ 37) supporting the magnetic dipole Mie resonances with the enhanced Purcell factor (∼7600) achieved by tuning the array parameters.

AB - We uncover how to achieve giant Q-factors in finite-length periodic arrays of subwavelength optical resonators. The underlying physics is based on interference between the band-edge mode and a standing mode in the array, and it leads to the formation of spatially localized states with dramatically suppressed radiative losses. We demonstrate this concept for an array of N dipoles with simultaneous cancellation of multipoles up to N-th order and the Q-factor growing as Q ∝ Nα, where α ≳ 6.88. We study a realistic array of nanoparticles (N ≲ 37) supporting the magnetic dipole Mie resonances with the enhanced Purcell factor (∼7600) achieved by tuning the array parameters.

KW - Mie resonances

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ER -

High-Q Localized States in Finite Arrays of Subwavelength Resonators

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