Observation of an Accidental Bound State in the Continuum in a Chain of Dielectric Disks

Sidorenko, Mikhail S.; Sergaeva, Olga; Sadrieva, Z. F.; Roques‐Carmes, Charles; Muraev, P. S.; Максимов, Дмитрий Н.; Bogdanov, Andrey

doi:10.1103/physrevapplied.15.034041

Cited by 47 publications

(20 citation statements)

References 54 publications

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“…Such an approximation has proven to be useful for linear chains. 67,129 However, one should keep in mind that in some cases, the eigenmodes in an infinite lattice can substantially differ from those in finite structures even if their size is large. 130 In practice, the width of the high-Q Fano resonances ceases to depend on the sample size if it is about several hundred of periods.…”

Section: Bics and Topological Chargesmentioning

confidence: 99%

“…119 However, there is no clear recipe how to fabricate high-Q metasurfaces with a small footprint, and today it remains a highly relevant challenge. The total Q factor of BICs in periodic dielectric structures is about 10 3 -10 4 in the visible and near-IR ranges, 49,67,92,120,129,131,132 and it strongly depends on the fabrication quality. The radiative Q factor can reach values of 10 6 -10 7 .…”

Section: Bics and Topological Chargesmentioning

confidence: 99%

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Bound states in the continuum in photonic structures

et al. 2021

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Bound states in the continuum provide a remarkable example of how a simple problem solved about a century ago in quantum mechanics can drive the research on a whole spectrum of resonant phenomena in wave physics. Due to their huge radiative lifetime, bound states in the continuum have found multiple applications in various areas of physics devoted to wave processes, including hydrodynamics, atomic physics, and acoustics. In this review paper, we present a comprehensive description of bound states in the continuum and related effects, focusing mainly on photonic dielectric structures. We review the history of this area, basic physical mechanisms in the formation of bound states in the continuum, and specific examples of structures supporting such states. We also discuss their possible applications in optics, photonics, and radiophysics.

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Section: Bics and Topological Chargesmentioning

confidence: 99%

Section: Bics and Topological Chargesmentioning

confidence: 99%

Bound states in the continuum in photonic structures

et al. 2021

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“…[ 31,32 ] While pure BICs are inaccessible from external excitation, a quasi BIC (QBIC) can potentially be obtained from free‐space either under oblique incidence (accidental BIC) or upon breaking the in‐plane symmetry under normal incidence (symmetry‐protected BIC). [ 33–38 ] Moreover, akin to dipolar resonances, a near‐unity transmission amplitude with 2

\pi

phase coverage can be obtained from the spectral overlap of two Fano resonant modes with out‐of‐phase reflection. [ 36 ] Following the aforementioned properties of QBIC metasurfaces, our group has recently shown the possibility of integrating the EO tuning mechanism into these platforms in order to obtain different functionalities such as dynamic control of light polarization and pulse compression.…”

Section: Introductionmentioning

confidence: 99%

Optical Pulse Compression Assisted by High‐Q Time‐Modulated Transmissive Metasurfaces

Sedeh

Salary

Mosallaei

2022

Laser & Photonics Reviews

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In this paper, based on the recently introduced concept of time-varying media, an alternative approach is presented for controlling the compression ratio of an optical pulse in the near-infrared regime via two all-dielectric transmissive metasurfaces consisting of a zigzag array of silicon-based elliptical nanodisks. Upon introducing in-plane asymmetries and under normal incidence, the supported symmetry-protected bound-state in the continuum resonant mode collapses into two Fano resonances, which can be spectrally overlapped to satisfy the first Kerker's condition. To acquire an amplified signal, the desired chirp is applied to the incident pulse via a purely temporal waveform that modulates the optical response of the first layer, while the required group delay dispersion is imparted to the phase-modulated pulse by the second metasurface in order to compress its temporal distribution. Following such a configuration, the temporal duration of the output pulse decreases from 25 to 15 ps, leading to a peak intensity enhancement of 50%. On account of time-varying features of the first metasurface, the instantaneous frequency of the chirped light can be controlled dynamically, giving rise to the active tuning of the peak intensity from 0% up to 200%.

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“…Initially, BICs were proposed in quantum mechanics by von Neumann and Wigner [1]. In the last two decades, BICs have been observed in many photonic structures such as photonic crystals, metasurfaces, [2][3][4], chains of coupled resonators [5][6][7][8], waveguides [9][10][11][12][13] and even single subwavelength resonators supporting quasi-BIC in a form of supercavity modes [14][15][16]. A divergent radiative quality (Q) factor, strong spatial localization, and drastic enhancement of the incident field make BICs very prospective for many applications including lasers [17][18][19][20][21][22][23][24][25], optical filters [26][27][28], biological and chemical sensors [29][30][31][32][33], and non-linear photonics [34][35][36][37][38][39][40][41][42][43].…”

Section: Introductionmentioning

confidence: 99%

Bound states in the continuum in periodic structures with structural disorder

Maslova¹,

Rybin²,

Bogdanov³

et al. 2021

Preprint

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We study the effect of structural disorder on the transition from the bound states in the continuum (BICs) to quasi-BICs by the example of the periodic photonic structure composed of two layers of parallel dielectric rods. We uncover the specificity in the robustness of the symmetry-protected and accidental BICs against various types of structural disorder. We analyze how the spatial mode localization induced by the structural disorder results in an effective reduction of the system length and limits the Q factor of quasi-BICs. Our results are essential for the practical implementation of BICs especially in natural and self-assembled photonic structures, where the structural disorder plays a crucial role.

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Observation of an Accidental Bound State in the Continuum in a Chain of Dielectric Disks

Cited by 47 publications

References 54 publications

Bound states in the continuum in photonic structures

Bound states in the continuum in photonic structures

Optical Pulse Compression Assisted by High‐Q Time‐Modulated Transmissive Metasurfaces

Bound states in the continuum in periodic structures with structural disorder

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