Super Bound States in the Continuum on a Photonic Flatband: Concept, Experimental Realization, and Optical Trapping Demonstration

In this work, we theoretically propose and experimentally demonstrate the formation of a super bound state in a continuum (BIC) on a photonic crystal flat band. This unique state simultaneously exhibits an enhanced quality factor and near-zero group velocity across an extended region of the Brilloui...

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Published in:Physical review letters 2024, Vol.132 (17)
Main Authors: Le, Ngoc Duc, Bouteyre, Paul, Kheir-Aldine, Ali, Dubois, Florian, Cueff, Sébastien, Berguiga, Lotfi, Letartre, Xavier, Viktorovitch, Pierre, Benyattou, Taha, Nguyen, Hai Son
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container_issue 17
container_start_page
container_title Physical review letters
container_volume 132
creator Le, Ngoc Duc
Bouteyre, Paul
Kheir-Aldine, Ali
Dubois, Florian
Cueff, Sébastien
Berguiga, Lotfi
Letartre, Xavier
Viktorovitch, Pierre
Benyattou, Taha
Nguyen, Hai Son
description In this work, we theoretically propose and experimentally demonstrate the formation of a super bound state in a continuum (BIC) on a photonic crystal flat band. This unique state simultaneously exhibits an enhanced quality factor and near-zero group velocity across an extended region of the Brillouin zone. It is achieved at the topological transition when a symmetry-protected BIC pinned at k = 0 merges with two Friedrich-Wintgen quasi-BICs, which arise from the destructive interference between lossy photonic modes of opposite symmetries. As a proof-of-concept, we employ the ultraflat super BIC to demonstrate three-dimensional optical trapping of individual particles. Our findings present a novel approach to engineering both the real and imaginary components of photonic states on a subwavelength scale for innovative optoelectronic devices.
doi_str_mv 10.1103/PhysRevLett.132.173802
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subjects Optics
Physics
title Super Bound States in the Continuum on a Photonic Flatband: Concept, Experimental Realization, and Optical Trapping Demonstration
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