Fibers based on propagating bound states in the continuum

Bulgakov, Evgeny N.; Sadreev, Almas F.

doi:10.1103/physrevb.98.085301

Cited by 15 publications

(15 citation statements)

References 37 publications

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“…Complex wave mixing effects were also considered by using non radiating states in [128], which reported Four Wave Mixing (FWM) in a similar structure of [109], and composed of a germanium nanodisk (200 nm of thickness and 625 nm of radius) in which two incident waves at different frequencies ( 1 and 2 ) give rise to four waves (3 1 , [38,117,[121][122][123][124].…”

Section: Nonlinear Harmonic Generationmentioning

confidence: 99%

“…This simple physics explains appearance of BICs in periodic photonic structures. Therefore, BICs can transfer energy without radiation losses in periodic structures (gratings, chains, metasurfaces) even if there are open diffraction channels [124,[149][150][151][152]. However, it is possible only at certain frequencies.…”

Section: Metamaterials and Metasurfacesmentioning

confidence: 99%

“…In particular, A. Sadreev and co-workers proposed a novel type of the waveguide consisting of a circular array of parallel dielectric wires providing optical signals above the light line of the surrounding space without raidiation losses (Fig. 5e) [124].…”

Section: Metamaterials and Metasurfacesmentioning

confidence: 99%

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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: Nonlinear Harmonic Generationmentioning

confidence: 99%

Section: Metamaterials and Metasurfacesmentioning

confidence: 99%

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Nonradiating photonics with resonant dielectric nanostructures

et al. 2019

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“…It also brings a new playground for the realization of higher-dimensional topological physics 53,54 . Topological fibers could also inspire new directions, design principles for novel fibers 55–57 .…”

Section: Discussionmentioning

confidence: 99%

Topological one-way fiber of second Chern number

2018

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One-way waveguides have been discovered as topological edge states in two-dimensional (2D) photonic crystals. Here, we design one-way fiber modes in a 3D magnetic Weyl photonic crystal realizable at microwave frequencies. We first obtain a 3D Chern crystal with a non-zero first Chern number by annihilating the Weyl points through supercell modulation. When the modulation becomes helixes, one-way modes develop along the winding axis, with the number of modes determined by the spatial frequency of the helix. These single-polarization single-mode and multi-mode one-way fibers, having nearly identical group and phase velocities, are topologically-protected by the second Chern number in the 4D parameter space of the 3D wavevectors plus the winding angle of the helix. This work suggests a unique way to utilize high-dimensional topological physics using topological defects.

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“…Certain designs of photonic crystal fibers can significantly suppress leakage without a bandgap [29][30][31], but residual radiation loss remains. Fibers with separable permittivity profiles have been suggested [32] but cannot be realized as exact values of permittivity need to be achieved.…”

Section: Introductionmentioning

confidence: 99%

Bound States in the Continuum in Fiber Bragg Gratings

et al. 2019

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Optical fibers typically confine light through total internal reflection or through photonic bandgaps. Here we show that light can be perfectly guided in optical fibers through a different mechanism based on bound states in the continuum (BICs). In fibers with periodic Bragg gratings, we predict bona fide BICs in purepolarization modes, as well as quasi-BICs in hybrid-polarization modes. These guided modes exist robustly without the need for fine structural tuning, and they persist even with the very small grating index contrasts that are available in conventional fiber Bragg gratings. The suppression of radiation loss arises from the coupling between a weakly-radiating mode and a strongly-radiating one. This finding opens the possibility of guiding light with BICs in optical fibers and their applications in distributed fiber sensors, in-line fiber filters, and high-power fiber lasers.

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Fibers based on propagating bound states in the continuum

Cited by 15 publications

References 37 publications

Nonradiating photonics with resonant dielectric nanostructures

Nonradiating photonics with resonant dielectric nanostructures

Topological one-way fiber of second Chern number

Bound States in the Continuum in Fiber Bragg Gratings

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