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Title: Formation of Bound States in the Continuum in Hybrid Plasmonic-Photonic Systems

Journal Article · · Physical Review Letters

A bound state in the continuum (BIC) is a localized state of an open structure with access to radiation channels, yet it remains highly confined with, in theory, an infinite lifetime and quality factor. There have been many realizations of such exceptional states in dielectric systems without loss. However, realizing BICs in lossy systems such as those in plasmonics remains a challenge. In this Letter, we explore the possibility of realizing BICs in a hybrid plasmonic-photonic structure consisting of a plasmonic grating coupled to a dielectric optical waveguide with diverging radiative quality factors. The plasmonic-photonic system supports two distinct groups of BICs: symmetry-protected BICs at the Γ point and off-Γ Friedrich-Wintgen BICs. The photonic waveguide modes are strongly coupled to the gap plasmons in the grating, leading to an avoided crossing behavior with a high value of Rabi splitting of 150 meV. Furthermore, we show that the strong coupling significantly alters the band diagram of the hybrid system, revealing opportunities for supporting stopped light at an off-Γ wide angular span.

Research Organization:
Purdue Univ., West Lafayette, IN (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES). Materials Sciences & Engineering Division; USDOE
Grant/Contract Number:
SC0017717
OSTI ID:
1612747
Alternate ID(s):
OSTI ID: 1488638
Journal Information:
Physical Review Letters, Vol. 121, Issue 25; ISSN 0031-9007
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 173 works
Citation information provided by
Web of Science

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Cited By (20)

Resonant Dual‐Grating Metamembranes Supporting Spectrally Narrow Bound States in the Continuum journal July 2019
Brewster quasi bound states in the continuum in all-dielectric metasurfaces from single magnetic-dipole resonance meta-atoms journal November 2019
Tunable surface plasmon polaritons and ultrafast dynamics in 2D nanohole arrays journal January 2019
Plasmonic sensors with an ultra-high figure of merit journal December 2019
Enhanced optical squeezing from quasi-bound states in the continuum and Fano resonances without nonlinearity journal December 2019
Metasurface Engineering through Bound States in the Continuum journal July 2019
Angle-Resolved Thermal Emission Spectroscopy Characterization of Non-Hermitian Metacrystals journal January 2020
Multipolar origin of bound states in the continuum journal September 2019
Bound States in the Continuum through Environmental Design journal July 2019
Bound states in the continuum and Fano resonances in the strong mode coupling regime journal January 2019
Strong terahertz magneto-optical phenomena based on quasi-bound states in the continuum and Fano resonances journal January 2019
Spectral and temporal evidence of robust photonic bound states in the continuum on terahertz metasurfaces journal January 2019
Tailoring the spatial localization of bound state in the continuum in plasmonic-dielectric hybrid system journal January 2020
Brewster quasi bound states in the continuum in all-dielectric metasurfaces from single magnetic-dipole resonance meta-atoms text January 2019
Metasurface engineering through bound states in the continuum text January 2019
Optical bistability with bound states in the continuum in dielectric gratings journal September 2020
Coupling-Assisted Quasi-Bound States in the Continuum in Heterogeneous Metasurfaces journal September 2023
Polarization-based branch selection of bound states in the continuum in dielectric waveguide modes anti-crossed by a metal grating text January 2019
Bound states in the continuum and exceptional points in dielectric waveguide equipped with a metal grating text January 2020
Efficient coupling between slanted bound states in the continuum cavity and plasmonic nanoantennas induced local field enhancement preprint January 2020

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