High-Q resonances governed by bound states in the continuum of a cross-shape nanohole array perforated on a photonic crystal slab

Xie, Suxia; Xie, Song; Z, Li; Li, Zhuoling; Тиан, Ганг; Zhan, Jie; Liu, Qiong

doi:10.1016/j.ijleo.2021.167449

Cited by 6 publications

(2 citation statements)

References 27 publications

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“…The first type is the symmetry-protected BIC [17][18][19], which usually appears at Γ points in grating and photonic crystal (PhC) plates. The symmetry-protected BIC can be transformed into a quasi-BIC by introducing oblique incidence [20,21] or breaking the structure's symmetry [22][23][24][25]. The other type is the parameter-tuned BIC or accidental BIC [26], which is achieved by destructive interference conditions, which are usually found in the metasurface supporting Fabry-Perot resonance [27], Friedrich-Wintgen coupling [28], Mie resonances [29], and single-mode resonance modes [30].…”

Section: Introductionmentioning

confidence: 99%

Chiral photothermoelectric effect driven by high-Q quasi-bound states in the continuum

Hu,

Yang,

Sang

et al. 2024

J. Opt.

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Bound states in continuum (BIC) have been proposed as a means to efficiently improve the light-matter interaction of metasurface. While breaking the mirror symmetry of structure and developing BIC into a reachable and observable quasi-BIC, it is usually accompanied by the chiral phenomenon with high quality (Q) factor. Here, we report a spin-sensitive photodetector in infrared (NIR) region, which is composed of a silicon metasurface with chiral quasi-BIC, a silver layer, and a thermoelectric layer. A chiral quasi- BIC supported by a silicon metsurface can be realized under normal incidence. Based on Finite element method (FEM) simulation, a silicon metsurface with a silver layer shows a high Q-factor of 958.6 with a giant absorption circular dichroism (CD) of 0.83. Subsequently, we study the thermal performance of the chiral absorbers by using Heat Transfer module of Comsol. Combining with the thermoelectric material bismuth telluride, we calculate the differential photothermoelectric effects of the system under circular-polarized light (CPL) irradiation. When the incident flux is 100 W/cm2, the output voltage under RCP (LCP) light reaches 0.59 mV (0.08 mV), which can be used for polarization detecting. Therefore, our designed structure incorporating thermoelectricity broadens the applications of chiral BIC in sensors and detectors.

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Section: Introductionmentioning

confidence: 99%

Chiral photothermoelectric effect driven by high-Q quasi-bound states in the continuum

Hu,

Yang,

Sang

et al. 2024

J. Opt.

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“…By tuning the geometric parameters of PhCs, the wavelength ranges of PBGs can be flexibly controlled [4]. By virtue of their prohibition property for light propagation, PBGs have been widely utilized to design various optical devices, such as lasers [5,6], fibers [7,8], absorbers [9][10][11][12][13][14], filters [15][16][17][18][19], sensors [20][21][22][23][24], polarization selectors [25,26], electro-optical encoders [27], optical decoders [28], all-optical flip-flops [29], and multiplexers [30,31]. Omnidirectional photonic bandgaps (OPBGs) represent the intersections of wavelength ranges of PBGs at all the incident angles [32].…”

Section: Introductionmentioning

confidence: 99%

Large omnidirectional mid-infrared photonic bandgap in a one-dimensional ternary photonic crystal consisting of isotropic dielectric, elliptical metamaterial and plasma

Cheng

She

et al. 2023

Phys. Scr.

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Photonic bandgaps (PBGs) in traditional one-dimensional (1-D) binary photonic crystals (PhCs) consisting of two kinds of isotropic dielectrics strongly shift towards shorter wavelengths as incident angle increases. Such blueshift property of PBGs intensively limits the widths of omnidirectional photonic bandgaps (OPBGs). Very recently, researchers achieved a special kind of PBGs called angle-insensitive PBGs in novel 1-D binary PhCs consisting of isotropic dielectric and elliptical metamaterial (EMM). The emergence of such angle-insensitive PBGs provides us an opportunity to achieve large OPBGs. Herein, we periodically introduce plasma layers into a 1-D binary PhC consisting of isotropic dielectric and EMM with an angle-insensitive PBG to achieve a large OPBG at mid-infrared wavelengths. The EMM is mimicked by an all-dielectric subwavelength multilayer. The broaden effect of the OPBG originates from the plasmonic property of plasma and the angle-insensitive property of the PBG. The width of the OPBG reaches 4.19 μm. Our work provides a feasible route to achieving large OPBGs in 1-D PhCs and would promote the development of OPBG-based devices, such as omnidirectional broadband reflectors and omnidirectional filters.

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Photonic manipulation of the all-dielectric terahertz metasurface based on bound states in the continuum

Xie,

Shen,

Yang

et al. 2024

Chinese Journal of Physics

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High-Q resonances governed by bound states in the continuum of a cross-shape nanohole array perforated on a photonic crystal slab

Cited by 6 publications

References 27 publications

Chiral photothermoelectric effect driven by high-Q quasi-bound states in the continuum

Chiral photothermoelectric effect driven by high-Q quasi-bound states in the continuum

Large omnidirectional mid-infrared photonic bandgap in a one-dimensional ternary photonic crystal consisting of isotropic dielectric, elliptical metamaterial and plasma

Photonic manipulation of the all-dielectric terahertz metasurface based on bound states in the continuum

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