Experimental demonstration of a silicon-slot quasi-bound state in the continuum in near-infrared all-dielectric metasurfaces

J. F. Algorri; F. Dell'Olio; Y. Ding; F. Labbé; V. Dmitriev; J. M. López-Higuera; J. M. Sánchez-Pena; L. C. Andreani; M. Galli; D. C. Zografopoulos

doi:10.1016/j.optlastec.2023.109199

Experimental demonstration of a silicon-slot quasi-bound state in the continuum in near-infrared all-dielectric metasurfaces

J. F. Algorri
, F. Dell'Olio
, Y. Ding
, F. Labbé
, V. Dmitriev
, J. M. López-Higuera
, J. M. Sánchez-Pena
, L. C. Andreani
, M. Galli
, D. C. Zografopoulos^*

^*Corresponding author for this work

Research output: Contribution to journal › Journal article › Research › peer-review

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Abstract

We theoretically and experimentally investigate a metasurface supporting a silicon-slot quasi-bound state in the continuum (qBIC) mode resonating in the near-infrared spectrum. The metasurface is composed of circular slots etched in a silicon layer on a sapphire substrate. The symmetry of the metasurface unit cell is reduced in order to provide access to the symmetry-protected mode, whose properties are investigated by finite-element full-wave and eigenfrequency analysis. The measured transmittance spectra verify the excitation of the investigated qBIC mode with experimental quality factors exceeding 700. The near-field distribution of the resonant qBIC mode shows strong field confinement in the slots, leading to high sensitivity values for refractometry.

Original language	English
Article number	109199
Journal	Optics and Laser Technology
Volume	161
Number of pages	7
ISSN	0030-3992
DOIs	https://doi.org/10.1016/j.optlastec.2023.109199
Publication status	Published - 2023

Keywords

Biosensing
Bound states in the continuum
Metamaterials
Nanofabrication
Silicon metasurfaces
Symmetry-protected modes

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10.1016/j.optlastec.2023.109199

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Algorri, J. F., Dell'Olio, F., Ding, Y., Labbé, F., Dmitriev, V., López-Higuera, J. M., Sánchez-Pena, J. M., Andreani, L. C., Galli, M., & Zografopoulos, D. C. (2023). Experimental demonstration of a silicon-slot quasi-bound state in the continuum in near-infrared all-dielectric metasurfaces. Optics and Laser Technology, 161, Article 109199. https://doi.org/10.1016/j.optlastec.2023.109199

@article{1c2e2bc49479470a8a3425767ec8c26f,

title = "Experimental demonstration of a silicon-slot quasi-bound state in the continuum in near-infrared all-dielectric metasurfaces",

abstract = "We theoretically and experimentally investigate a metasurface supporting a silicon-slot quasi-bound state in the continuum (qBIC) mode resonating in the near-infrared spectrum. The metasurface is composed of circular slots etched in a silicon layer on a sapphire substrate. The symmetry of the metasurface unit cell is reduced in order to provide access to the symmetry-protected mode, whose properties are investigated by finite-element full-wave and eigenfrequency analysis. The measured transmittance spectra verify the excitation of the investigated qBIC mode with experimental quality factors exceeding 700. The near-field distribution of the resonant qBIC mode shows strong field confinement in the slots, leading to high sensitivity values for refractometry.",

keywords = "Biosensing, Bound states in the continuum, Metamaterials, Nanofabrication, Silicon metasurfaces, Symmetry-protected modes",

author = "Algorri, \{J. F.\} and F. Dell'Olio and Y. Ding and F. Labb{\'e} and V. Dmitriev and L{\'o}pez-Higuera, \{J. M.\} and S{\'a}nchez-Pena, \{J. M.\} and Andreani, \{L. C.\} and M. Galli and Zografopoulos, \{D. C.\}",

note = "Publisher Copyright: {\textcopyright} 2023 Elsevier Ltd",

year = "2023",

doi = "10.1016/j.optlastec.2023.109199",

language = "English",

volume = "161",

journal = "Optics and Laser Technology",

issn = "0030-3992",

publisher = "Elsevier",

}

Algorri, JF, Dell'Olio, F, Ding, Y , Labbé, F, Dmitriev, V, López-Higuera, JM, Sánchez-Pena, JM, Andreani, LC, Galli, M & Zografopoulos, DC 2023, 'Experimental demonstration of a silicon-slot quasi-bound state in the continuum in near-infrared all-dielectric metasurfaces', Optics and Laser Technology, vol. 161, 109199. https://doi.org/10.1016/j.optlastec.2023.109199

TY - JOUR

T1 - Experimental demonstration of a silicon-slot quasi-bound state in the continuum in near-infrared all-dielectric metasurfaces

AU - Algorri, J. F.

AU - Dell'Olio, F.

AU - Ding, Y.

AU - Labbé, F.

AU - Dmitriev, V.

AU - López-Higuera, J. M.

AU - Sánchez-Pena, J. M.

AU - Andreani, L. C.

AU - Galli, M.

AU - Zografopoulos, D. C.

PY - 2023

Y1 - 2023

N2 - We theoretically and experimentally investigate a metasurface supporting a silicon-slot quasi-bound state in the continuum (qBIC) mode resonating in the near-infrared spectrum. The metasurface is composed of circular slots etched in a silicon layer on a sapphire substrate. The symmetry of the metasurface unit cell is reduced in order to provide access to the symmetry-protected mode, whose properties are investigated by finite-element full-wave and eigenfrequency analysis. The measured transmittance spectra verify the excitation of the investigated qBIC mode with experimental quality factors exceeding 700. The near-field distribution of the resonant qBIC mode shows strong field confinement in the slots, leading to high sensitivity values for refractometry.

AB - We theoretically and experimentally investigate a metasurface supporting a silicon-slot quasi-bound state in the continuum (qBIC) mode resonating in the near-infrared spectrum. The metasurface is composed of circular slots etched in a silicon layer on a sapphire substrate. The symmetry of the metasurface unit cell is reduced in order to provide access to the symmetry-protected mode, whose properties are investigated by finite-element full-wave and eigenfrequency analysis. The measured transmittance spectra verify the excitation of the investigated qBIC mode with experimental quality factors exceeding 700. The near-field distribution of the resonant qBIC mode shows strong field confinement in the slots, leading to high sensitivity values for refractometry.

KW - Biosensing

KW - Bound states in the continuum

KW - Metamaterials

KW - Nanofabrication

KW - Silicon metasurfaces

KW - Symmetry-protected modes

U2 - 10.1016/j.optlastec.2023.109199

DO - 10.1016/j.optlastec.2023.109199

M3 - Journal article

AN - SCOPUS:85146655720

SN - 0030-3992

VL - 161

JO - Optics and Laser Technology

JF - Optics and Laser Technology

M1 - 109199

ER -

Experimental demonstration of a silicon-slot quasi-bound state in the continuum in near-infrared all-dielectric metasurfaces

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