scholarly journals Experimental observation of symmetry protected bound state in the radiation continuum in the periodic array of ceramic disks

2018 ◽  
Vol 1124 ◽  
pp. 051057 ◽  
Author(s):  
A A Bogdanov ◽  
M Balezin ◽  
P V Kapitanova ◽  
Z Sadrieva ◽  
M Belyakov ◽  
...  
Keyword(s):  
Experimental Observation ◽  
Bound State ◽  
Periodic Array ◽  
Symmetry Protected

scholarly journals Experimental observation of a symmetry-protected bound state in the continuum in a chain of dielectric disks

2019 ◽  
Vol 99 (5) ◽  
Author(s):  
Z. F. Sadrieva ◽  
M. A. Belyakov ◽  
M. A. Balezin ◽  
P. V. Kapitanova ◽  
E. A. Nenasheva ◽  
...  
Keyword(s):  
Experimental Observation ◽  
Bound State ◽  
A Chain ◽  
Symmetry Protected ◽  
The Continuum

Experimental observation of a polarization vortex at a bound state in the continuum (Conference Presentation)

2018 ◽  
Author(s):  
Hugo Doeleman ◽  
Francesco Monticone ◽  
Wouter den Hollander ◽  
Andrea Alù ◽  
Femius Koenderink
Keyword(s):  
Experimental Observation ◽  
Bound State ◽  
Polarization Vortex ◽  
The Continuum

scholarly journals BIC in waveguide arrays

2021 ◽  
Vol 255 ◽  
pp. 07001
Author(s):  
Vladimír Kuzmiak ◽  
Jiří Petráček
Keyword(s):  
Bound State ◽  
Coupled Mode Theory ◽  
One Dimensional ◽  
Waveguide Arrays ◽  
Coupled Mode ◽  
Simple Theoretical Model ◽  
The Common ◽  
The One ◽  
Symmetry Protected ◽  
The Continuum

We propose a simple theoretical model based on the coupled-mode theory which allows to calculate the spectral properties and transmittance of the one-dimensional waveguide structures. The model was verified on the common coupled-waveguide array in which the existence of the symmetry-protected bound state in the continuum (BIC) was confirmed experimentally by Plotnik et al. [Phys. Rev. Lett. 107, 28-31 (2011)]. The method can be extended to topologically nontrivial lattices to explore the properties of the BICs protected by time-reversal symmetry.

scholarly journals Dynamical picture for the exotic XYZ states

2018 ◽  
Vol 192 ◽  
pp. 00042 ◽  
Author(s):  
Mikhail Ivanov
Keyword(s):  
Experimental Data ◽  
Charged Particle ◽  
Experimental Observation ◽  
B Meson ◽  
Effective Interaction ◽  
Bound State ◽  
Decay Rates ◽  
Size Parameter ◽  
Molecular Type ◽  
Decay Widths

We present a dynamical approach for description of the multi-quark states that is based on an effective interaction Lagrangian describing the coupling of hadrons to their constituent quarks. First, we explore the consequences of treating the X(3872) meson as a tetraquark bound state. We calculate the decay widths of the observed channels and conclude that for reasonable values of the size parameter of the X(3872) one finds consistency with the available experimental data. Then we have critically checked the tetraquark picture for the Zc(3900) state by analyzing its strong decays. We found that Zc(3900) has a much more stronger coupling to DD* than to J/Ψπ that is in discord with experiment. As an alternative we have employed a molecular-type four-quark current to describe the decays of the Zc(3900) state as the charged particle in the isotriplet. We found that a molecular-type current gives the values of the above decays in accordance with the experimental observation. By using moleculartype four-quark currents for the recently observed resonances Zb(10610) and Zb(10650), we have calculated their two-body decay rates into a bottomonium state plus a light meson as well as into B-meson pairs.

scholarly journals Transformation of guided modes into bound states in the continuum

2021 ◽  
Vol 2015 (1) ◽  
pp. 012078
Author(s):  
Aleksandra A. Kutuzova ◽  
Mikhail V. Rybin
Keyword(s):  
Field Distribution ◽  
Brillouin Zone ◽  
Bound States ◽  
Periodic Array ◽  
Leaky Modes ◽  
Guided Modes ◽  
Silicon Based ◽  
Symmetry Protected ◽  
Related Mode ◽  
The Continuum

Abstract We study a silicon-based structure composed of parallel rods arranged in a periodic array. The structure supports guided modes which due to the deformation of structure in general become leaky modes. At the same time the modes split at the Brillouin zone surface by a pair with certain symmetry. Here we report on guided modes transformation into symmetry-protected BIC under deforming the structure, because of inherent field distribution governed by the Bragg-related mode hybridization.

scholarly journals Symmetry-protected vortex bound state in superfluidHe3−Bphase

2015 ◽  
Vol 91 (14) ◽  
Author(s):  
Yasumasa Tsutsumi ◽  
Takuto Kawakami ◽  
Ken Shiozaki ◽  
Masatoshi Sato ◽  
Kazushige Machida
Keyword(s):  
Bound State ◽  
Symmetry Protected

scholarly journals Flatness and boundness of photonic drumhead surface state in a metallic lattice

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Yu Wang ◽  
Xiaoxi Zhou ◽  
Shanshan Li ◽  
Wenya Zhang ◽  
Chuandeng Hu ◽  
...  
Keyword(s):  
Band Structure ◽  
Brillouin Zone ◽  
Surface State ◽  
Bound State ◽  
Experimental Investigations ◽  
Far Field ◽  
Reflection Measurement ◽  
Potential Applications ◽  
Surface Brillouin Zone ◽  
Symmetry Protected

AbstractNodal chain (NC) semi-metals have the degeneracy of interlacing rings in their band structure in momentum space. With the projection of degenerate rings towards crystal boundaries, there is a special type of surface dispersion appearing at surface Brillouin zone and termed drumhead surface state (DSS). Previously, experimental investigations on photonic NC and DSS have been done on metallic photonic crystals at microwave frequencies. However, far-field detection of DSS and its coupling to radiative modes in free space have not been studied. In the work, we analyze the photonic DSS in a metallic lattice by angle-resolved far-field reflection measurement and numerical simulation at terahertz (THz) frequencies, and reveal its flatness and boundness in band structure, even in the radiation continuum. Particularly, the DSS band can be tuned being from negatively dispersive via flat to positively dispersive by a single surface parameter, and the DSS at Γ point in surface Brillouin zone is in fact a symmetry-protected bound state in the continuum. Our results might have some potential applications towards THz photonics.

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