Conditions for enhanced scattering and field confinement in single-mode metasurface cavities
Brugnolo, Pietro LU
; Arslanagić, Samel
and Jacobsen, Rasmus E.
(2025)
In Physical Review B
112(24).
p.2411121-2411127
- Abstract
Closed-form conditions for bound states in the continuum are derived for planar, cylindrical, and spherical cavities enclosed by metasurfaces with electric and magnetic response. While the combined response in lossless systems enables field confinement in arbitrarily small cavities, the gain-enabled bound states in the continuum are found to coalesce with a laser mode, leading to intriguing single-mode spectral singularities characterized by divergent scattered fields with simultaneously vanishing internal fields of the respective cavities. In support of the analytical characterizations, a full-wave numerical demonstration of the spectral singularities is presented in cylindrical metasurface cavities made of dielectric particles... (More)
Closed-form conditions for bound states in the continuum are derived for planar, cylindrical, and spherical cavities enclosed by metasurfaces with electric and magnetic response. While the combined response in lossless systems enables field confinement in arbitrarily small cavities, the gain-enabled bound states in the continuum are found to coalesce with a laser mode, leading to intriguing single-mode spectral singularities characterized by divergent scattered fields with simultaneously vanishing internal fields of the respective cavities. In support of the analytical characterizations, a full-wave numerical demonstration of the spectral singularities is presented in cylindrical metasurface cavities made of dielectric particles situated in a host gain medium. Beyond unveiling the fundamental physics governing metasurface cavities, our results offer a compact and broadly applicable tool for designing next-generation devices across the electromagnetic spectrum.
(Less)
- author
- Brugnolo, Pietro
LU
; Arslanagić, Samel
and Jacobsen, Rasmus E.
- organization
- publishing date
- 2025-12-19
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Physical Review B
- volume
- 112
- issue
- 24
- pages
- 2411121 - 2411127
- publisher
- American Physical Society
- external identifiers
-
- scopus:105026677277
- ISSN
- 2469-9950
- DOI
- 10.1103/18h1-779s
- language
- English
- LU publication?
- yes
- additional info
- Publisher Copyright: © 2025 American Physical Society
- id
- 0eea2514-3602-4773-9b0c-17060ed9bf25
- date added to LUP
- 2026-02-10 16:45:54
- date last changed
- 2026-02-10 16:46:29
@article{0eea2514-3602-4773-9b0c-17060ed9bf25,
abstract = {{<p>Closed-form conditions for bound states in the continuum are derived for planar, cylindrical, and spherical cavities enclosed by metasurfaces with electric and magnetic response. While the combined response in lossless systems enables field confinement in arbitrarily small cavities, the gain-enabled bound states in the continuum are found to coalesce with a laser mode, leading to intriguing single-mode spectral singularities characterized by divergent scattered fields with simultaneously vanishing internal fields of the respective cavities. In support of the analytical characterizations, a full-wave numerical demonstration of the spectral singularities is presented in cylindrical metasurface cavities made of dielectric particles situated in a host gain medium. Beyond unveiling the fundamental physics governing metasurface cavities, our results offer a compact and broadly applicable tool for designing next-generation devices across the electromagnetic spectrum.</p>}},
author = {{Brugnolo, Pietro and Arslanagić, Samel and Jacobsen, Rasmus E.}},
issn = {{2469-9950}},
language = {{eng}},
month = {{12}},
number = {{24}},
pages = {{2411121--2411127}},
publisher = {{American Physical Society}},
series = {{Physical Review B}},
title = {{Conditions for enhanced scattering and field confinement in single-mode metasurface cavities}},
url = {{http://dx.doi.org/10.1103/18h1-779s}},
doi = {{10.1103/18h1-779s}},
volume = {{112}},
year = {{2025}},
}