Brillouin Zone Folding Metasurface for Near Perfect Circular Dichroism
Sign Up to like & getrecommendations! Published in 2024 at "Advanced Optical Materials"
DOI: 10.1002/adom.202401027
Abstract: Planar chiral metasurfaces have demonstrated their proficiency in manipulating chiral light‐matter interactions for diverse applications. Nevertheless, it proves arduous to simultaneously attain elevated quality factors and potent chirality response. In this work, a planar chiral… read more here.
Keywords: zone folding; brillouin zone; circular dichroism; bzf bics ... See more keywords
Lasing from Brillouin Zone Folding Guided Resonances.
Sign Up to like & getrecommendations! Published in 2025 at "ACS nano"
DOI: 10.1021/acsnano.5c08419
Abstract: High-quality factor (Q-factor) nanophotonic cavities are critical components in applications such as lasing and nonlinear optics. However, to obtain out-of-plane lasing emission and a low lasing threshold, the lasing mode must fulfill the contradictory requirement… read more here.
Keywords: zone folding; brillouin zone; guided resonances; lasing brillouin ... See more keywords
Chiral quasi-bound states in the continuum via Brillouin zone folding
Sign Up to like & getrecommendations! Published in 2025 at "Applied Physics Letters"
DOI: 10.1063/5.0269369
Abstract: Chiral quasi-bound states in the continuum (q-BICs) provide a way to investigate light–matter interactions. Currently, the chiral response is fundamentally constrained by the rapid decay of quality (Q-) factors with symmetry breaking, making the robustness… read more here.
Keywords: zone folding; states continuum; brillouin zone; quasi bound ... See more keywords
Symmetry-protected and Brillouin zone folding driven bound states in the continuum in dielectric nanorod arrays for efficient third harmonic generation
Sign Up to like & getrecommendations! Published in 2024 at "Chinese Physics B"
DOI: 10.1088/1674-1056/ada2f0
Abstract: Two types of bound states in continuum (BICs), symmetry-protected and Brillouin zone folding driven, are identified in hollow Si nanorod arrays. By modulating the direction and distance of the air holes from the center of… read more here.
Keywords: zone folding; states continuum; protected brillouin; brillouin zone ... See more keywords
Observation of zone folding induced acoustic topological insulators and the role of spin-mixing defects
Sign Up to like & getrecommendations! Published in 2017 at "Physical Review B"
DOI: 10.1103/physrevb.96.184305
Abstract: This letter investigates a flow-free, pseudospin-based acoustic topological insulator. Zone folding, a strategy originated from photonic crystal, is used to form double Dirac cones in phononic crystal. The lattice symmetry of the phononic crystal is… read more here.
Keywords: observation zone; topological insulators; induced acoustic; acoustic topological ... See more keywords
High-Q quasi-BIC metasurfaces with flat response to dimensional perturbations using Brillouin zone folding.
Sign Up to like & getrecommendations! Published in 2025 at "Optics letters"
DOI: 10.1364/ol.577999
Abstract: Traditional high-Q metasurfaces driven by bound states in the continuum (BICs) rely on slight symmetry-breaking or nanoscopic control of structural parameters, inevitably requiring stringent and precise fabrication. Here, we propose a high-Q qBIC metasurface which… read more here.
Keywords: zone folding; brillouin zone; zone; high quasi ... See more keywords
Enhancement of second-harmonic generation through Brillouin zone folding in a waveguide-coupled metasurface
Sign Up to like & getrecommendations! Published in 2025 at "Nanophotonics"
DOI: 10.1515/nanoph-2025-0167
Abstract: Abstract Metasurfaces have become significant platforms for optical manipulation, yet unlocking their full potential for nonlinear optics requires novel mechanisms to control and enable frequency conversion processes. This study demonstrates how structural dimerization in plasmonic… read more here.
Keywords: zone folding; brillouin zone; enhancement second; harmonic generation ... See more keywords