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

24 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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title = "High-Q Localized States in Finite Arrays of Subwavelength Resonators",

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.",

keywords = "Mie resonances, Q-factor, nanoparticle arrays, subwavelength nanoparticles",

author = "Kornovan, \{Danil F.\} and Savelev, \{Roman S.\} and Yuri Kivshar and Petrov, \{Mihail I.\}",

note = "Publisher Copyright: {\textcopyright} 2021 American Chemical Society.",

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doi = "10.1021/acsphotonics.1c01262",

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AU - Kornovan, Danil F.

AU - Savelev, Roman S.

AU - Kivshar, Yuri

AU - Petrov, Mihail I.

PY - 2021/12/15

Y1 - 2021/12/15

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

KW - Q-factor

KW - nanoparticle arrays

KW - subwavelength nanoparticles

UR - https://www.scopus.com/pages/publications/85120337502

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DO - 10.1021/acsphotonics.1c01262

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SP - 3627

EP - 3632

JO - ACS Photonics

JF - ACS Photonics

IS - 12

ER -

High-Q Localized States in Finite Arrays of Subwavelength Resonators

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