Topologically enabled ultrahigh-Q guided resonances robust to out-of-plane scattering

Jin, Jicheng; Yin, Xuefan; Ni, Liangfu; Soljačić, Marin; Zhen, Bo; Peng, Chao

doi:10.1038/s41586-019-1664-7

Cited by 414 publications

(293 citation statements)

References 46 publications

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“…[37] where the effects of surface roughness and energy leakage into the substrate were discussed. Later, the destructive effects of the sample finiteness [38,[65][66][67][68] and disorder losses [67,[69][70][71] were demonstrated.…”

Section: Bound States In the Continuummentioning

confidence: 99%

Nonradiating photonics with resonant dielectric nanostructures

et al. 2019

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Nonradiating sources of energy have traditionally been studied in quantum mechanics and astrophysics, while receiving a very little attention in the photonics community. This situation has changed recently due to a number of pioneering theoretical studies and remarkable experimental demonstrations of the exotic states of light in dielectric resonant photonic structures and metasurfaces, with the possibility to localize efficiently the electromagnetic fields of high intensities within small volumes of matter. These recent advances underpin novel concepts in nanophotonics, and provide a promising pathway to overcome the problem of losses usually associated with metals and plasmonic materials for the efficient control of the light-matter interaction at the nanoscale. This review paper provides the general background and several snapshots of the recent results in this young yet prominent research field, focusing on two types of nonradiating states of light that both have been recently at the center of many studies in all-dielectric resonant meta-optics and metasurfaces: optical anapoles and photonic bound states in the continuum. We discuss a brief history of these states in optics, their underlying physics and manifestations, and also emphasize their differences and similarities. We also review some applications of such novel photonic states in both linear and nonlinear optics for the nanoscale field enhancement, a design of novel dielectric structures with high-resonances, nonlinear wave mixing and enhanced harmonic generation, as well as advanced concepts for lasing and optical neural networks. arXiv:1903.04756v1 [physics.optics]

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Section: Bound States In the Continuummentioning

confidence: 99%

Nonradiating photonics with resonant dielectric nanostructures

et al. 2019

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“…3(b)]. The Q factor and peak transmittance are reduced,which may be caused by scattering losses in the fabricated sample induced by surface roughness, structural disorder, and finite size of the sample [27,28]. The measured Q factor is extracted from the experimental transmission spectra using single-peak fitting to a Fano lineshape via the Levenberg-Marquardt algorithm.…”

Section: Fabrication and Experimental Resultsmentioning

confidence: 99%

Photosensitive chalcogenide metasurfaces supporting bound states in the continuum

Mikheeva¹,

Koshelev²,

Choi³

et al. 2019

Opt. Express

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We study, both theoretically and experimentally, tunable metasurfaces supporting sharp Fano-resonances inspired by optical bound states in the continuum. We explore the use of arsenic trisulfide (a photosensitive chalcogenide glass) having optical properties which can be finely tuned by light absorption at the post-fabrication stage. We select the resonant wavelength of the metasurface corresponding to the energy below the arsenic trisulfide bandgap, and experimentally control the resonance spectral position via exposure to the light of energies above the bandgap.

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“…In previous works [43,45], we identified some special BICs such that the Q-factors of the nearby resonant modes are at least O(1/|β − β * | 4 ). It is also known that for some cases, the Q-factors are O(1/|β −β * | 6 ) [48].…”

Section: Introductionmentioning

confidence: 99%

Perturbation theories for symmetry-protected bound states in the continuum on two-dimensional periodic structures

Yuan

2020

Phys. Rev. A

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On dielectric periodic structures with a reflection symmetry in a periodic direction, there can be antisymmetric standing waves (ASWs) that are symmetry-protected bound states in the continuum (BICs). The BICs have found many applications, mainly because they give rise to resonant modes of extremely large quality-factors (Q-factors). The ASWs are robust to symmetric perturbations of the structure, but they become resonant modes if the perturbation is non-symmetric. The Q-factor of a resonant mode on a perturbed structure is typically O(1/δ 2 ) where δ is the amplitude of the perturbation, but special perturbations can produce resonant modes with larger Q-factors. For twodimensional (2D) periodic structures with a 1D periodicity, we derive conditions on the perturbation profile such that the Q-factors are O(1/δ 4 ) or O(1/δ 6 ). For the unperturbed structure, an ASW is surrounded by resonant modes with a nonzero Bloch wave vector. For 2D periodic structures, the Q-factors of nearby resonant modes are typically O(1/β 2 ), where β is the Bloch wavenumber. We show that the Q-factors can be O(1/β 6 ) if the ASW satisfies a simple condition.

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Topologically enabled ultrahigh-Q guided resonances robust to out-of-plane scattering

Cited by 414 publications

References 46 publications

Nonradiating photonics with resonant dielectric nanostructures

Nonradiating photonics with resonant dielectric nanostructures

Photosensitive chalcogenide metasurfaces supporting bound states in the continuum

Perturbation theories for symmetry-protected bound states in the continuum on two-dimensional periodic structures

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