High Q-Factor Resonance in a Symmetric Array of All-Dielectric Bars

Sui, Chuanshuai; Li, Xiangjun; Lang, Tingting; Jing, Xufeng; Liu, Jianjun; Hong, Zhi

doi:10.3390/app8020161

Cited by 10 publications

(8 citation statements)

References 43 publications

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“…We began our investigation from a typical 2D RMS supporting a high-Q TD resonance [38,44,46], as shown in Figure 1a. The length, width and height of the rod are represented by l 1 , w 1 and h 1 , respectively.…”

Section: Silicon Rod Metasurface Supporting F-w Bicmentioning

confidence: 99%

Analogue of Electromagnetically Induced Transparency in an All-Dielectric Double-Layer Metasurface Based on Bound States in the Continuum

Pan

et al. 2021

Nanomaterials

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Bound states in the continuum (BICs) have attracted much attention due to their infinite Q factor. However, the realization of the analogue of electromagnetically induced transparency (EIT) by near-field coupling with a dark BIC in metasurfaces remains challenging. Here, we propose and numerically demonstrate the realization of a high-quality factor EIT by the coupling of a bright electric dipole resonance and a dark toroidal dipole BIC in an all-dielectric double-layer metasurface. Thanks to the designed unique one-dimensional (D)–two-dimensional (2D) combination of the double-layer metasurface, the sensitivity of the EIT to the relative displacement between the two layer-structures is greatly reduced. Moreover, several designs for widely tunable EIT are proposed and discussed. We believe the proposed double-layer metasurface opens a new avenue for implementing BIC-based EIT with potential applications in filtering, sensing and other photonic devices.

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Section: Silicon Rod Metasurface Supporting F-w Bicmentioning

confidence: 99%

Analogue of Electromagnetically Induced Transparency in an All-Dielectric Double-Layer Metasurface Based on Bound States in the Continuum

Pan

et al. 2021

Nanomaterials

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“…The spectra of the absorbers were numerically calculated using the commercial simulation software CST Microwave Studio (CST Studio Suite 2014, CST Company, Darmstadt, Germany) with the finite-element frequency-domain solver. The calculation procedure was similar to what other people in our research group had previously done in their papers [28,29]. Periodic boundary conditions were used in both xand ydirections, while open boundary condition was used in ±z direction.…”

Section: Structure Design and Simulationmentioning

confidence: 99%

Combined Mie Resonance Metasurface for Wideband Terahertz Absorber

Lang

Shen

et al. 2018

Applied Sciences

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In this paper, we propose a combined metasurface consisting of an aluminum substrate and an array of TiO2 blocks to achieve a wideband terahertz absorber. We incorporated several similar dielectric blocks with different side length into each unit cell. Each dielectric block could cause magnetic-resonance-inducing absorption effect with different peak wavelengths. Thus, our combined metasurface could achieve wider absorption frequency band than the traditional design when these dielectric blocks were properly designed. The absorption bandwidth could be widened nearly 2.5 times and 5 times compared to a single block case when there were four and nine blocks, respectively, andcouldbe further improved by increasing the number of combinations in structures (variable parameters included number, spacing, dimensions etc.). For both TE00 (the electric fields of the light polarized along the y-axis) and TM00 (the electric fields of the light polarized along the x-axis) polarization states, the absorption bandwidth could be widened effectively; even when the incident angle was 45°, the absorption rate could still reach about 75%. This structure is simple and easy to fabricate, and this design concept can also be used in various other application fields.

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“…It provides a new way to realize the miniaturization of photonic devices and integrated optics. However, compared to the all-dielectric resonators [13], the realization of high Q value in the metallic structure remains a big challenge due to the large metal ohmic loss in optical regime and radiation loss, which is limiting the performance of the plasmonic structure in many fields. For example, high Q resonance is helpful in improving the sensitivity for ultra-high sensitive sensing.…”

Section: Introductionmentioning

confidence: 99%

Ultra-Narrow-Band Filter Based on High Q Factor in Metallic Nanoslit Arrays

Guo

Yang

et al. 2020

Sensors

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Here we propose a novel high Q ultra-narrow-band filter in the optical regime. Multiple high Q resonances are achieved in ultra-thin metallic nanoslit arrays on stacked low index–high index dielectric (LID–HID) substrate. Based on the cooperative effect of suppressed modes and transmission modes, the high spectral resolution of transmission peaks is obtained. The number and Q factor of transmission peaks can be freely manipulated by a simple combination of the stacked LID–HID. It is demonstrated that the linewidths of the transmission peaks can be reduced down to the extreme limit of 1 nm and the Q factor is up to 700 by optimizing the structure parameter of the three-layer LID–HID. The results provide a theoretical basis to design a multi-band nanophotonic device with a high Q factor and have potential applications in the next generation of high-resolution plasmonic biosensing and filtering.

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High Q-Factor Resonance in a Symmetric Array of All-Dielectric Bars

Cited by 10 publications

References 43 publications

Analogue of Electromagnetically Induced Transparency in an All-Dielectric Double-Layer Metasurface Based on Bound States in the Continuum

Analogue of Electromagnetically Induced Transparency in an All-Dielectric Double-Layer Metasurface Based on Bound States in the Continuum

Combined Mie Resonance Metasurface for Wideband Terahertz Absorber

Ultra-Narrow-Band Filter Based on High Q Factor in Metallic Nanoslit Arrays

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