Non-Hermitian 
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-Symmetric Spectral Protection of Nonlinear Defect Modes

Jeon, Do Hyeok; Reisner, Mattis; Mortessagne, Fabrice; Kuhl, Ulrich

doi:10.1103/physrevlett.125.113901

Cited by 15 publications

(6 citation statements)

References 40 publications

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“…[81][82][83][84] In the artificial nonlinear field, NH systems also have important prospects. Jeon et al [26] demonstrated the interplay of a lossy nonlinearity and chargeconjugation (CT) symmetry in the formation of defect modes. They realized an SSH coupled resonator microwave waveguide (CRMW) array with a defect resonator coupled inductively to a PIN diode.…”

Section: Ceramic-based Dielectric Metamaterials In Nh Systemsmentioning

confidence: 99%

“…For instance, the mode coupling can be modified by adjusting the loss and structure of the ceramic unit cell to achieve properties that are not possible in Hermitian systems, and additional topological structures with specific functionalities will be designed and fabricated in the future, which are expected to be applied to a variety of devices based on quantum mechanics, such as optical switches, coherent perfect absorbers, and high-resolution sensors. [25,26] In addition, ceramic-based dielectric metamaterials are no longer limited in electromagnetic applications at present. With the continuous development of ceramic materials and preparation methods, the corresponding physical and chemical properties are controllable, then trigger an upsurge of research on ceramic-based dielectric metamaterials in more fields.…”

Section: Introductionmentioning

confidence: 99%

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Ceramic‐based dielectric metamaterials

Luo

Yan

Zhou

2022

Interdisciplinary Materials

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Dielectric metamaterials based on ceramics have attracted considerable interest in the past few years owing to their low dielectric loss, simple structure, excellent multifield tunability, and good environmental adaptability. They are considered to be promising alternative to metal‐based metamaterials and can lead to a new strategy for the development of passive devices. In this review, the recent progress of ceramic‐based dielectric metamaterials in electromagnetic applications, energy applications, non‐Hermitian systems, and natural materials with near‐zero or negative refraction are summarized. The design principle and mechanism, as well as manufacturing technologies, are also introduced, and the current development trend of ceramic‐based dielectric metamaterials are proposed.

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Section: Ceramic-based Dielectric Metamaterials In Nh Systemsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Ceramic‐based dielectric metamaterials

Luo

Yan

Zhou

2022

Interdisciplinary Materials

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“…Zeng X X et al prepared metamaterials based on TmFeO3 ceramics and obtained higher dielectric constants through 3D printing and laser direct writing techniques [34,35]. Jeon et al proposed and simulated a resonator based on ZrSnTiO ceramics (resonant frequency of about 6.876 GHz) [36]. Fourthly, the influence of the ceramic substrates on the absorption performance of the metamaterial was also measured, as shown in figure 10.…”

Section: Resultsmentioning

confidence: 99%

Design and verification of a high bandwidth metamaterial based on daily ceramics and its thermal conductivity

Lin²

2023

Mater. Res. Express

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High temperature resistant metamaterial absorbers with large bandwidth and high performance are a promising research field. At present, many reported absorbing materials have the defects of single absorption mechanism and temperature sensitivity, and the main properties of many metamaterial absorbers are not high temperature resistance. In order to expand the performance of high-temperature metamaterials, a metamaterial absorber based on daily ceramics is proposed and verified in this paper. The principle of the absorption band is based on the LSP mode resonance between disk arrays, the SPP mode resonance on the surface of disk arrays, and the dielectric loss of the ceramic substrate itself. The effects of structural parameters, temperature, preparation process and type of ceramic substrate on the absorption properties of the metamaterial were measured. The measurement results show that the metamaterial absorber has obvious temperature stability. The absorption band of the metamaterial can be strengthened by increasing the thickness of the ceramic substrate and the diameter of the disk array. The average value of absorption band is less affected by the preparation technology of daily ceramic substrate. The mean absorption bands obtained based on the four preparation technologies (Chemical vapor deposition, Microwave induced synthesis, Sol-gel method, Carbothermal reduction method) are: 0.861, 0.882,0.857, and 0.842, respectively. The average value of absorption band based on four kinds of daily ceramics (SiC, ZrSiO4, TmFeO3, and ZrSnTiO) are: 0.861, 0.776, 0.908, and 0.857, respectively. In addition, the thermal conductivity and thermal resistance of daily ceramics are important parameters to measure the thermal resonance performance of the ceramic-based metamaterial absorber. The results confirm the effect of ceramic on the thermal conductivities (thermal response current, thermal resistance and thermal conductivity). Therefore, the proposed daily ceramic-based metamaterial absorber has the following advantages: absorption is temperature-independent, and the high temperature metamaterial is capable of excellent heat conductivity.

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“…1b] sandwiched between two aluminum plates. This hybrid system demonstrates a non-linear response (see Supplement) [39,40]. The resonator is excited via two kink antennas curved around it.…”

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confidence: 99%

Towards a Broad-Band Coherent Perfect Absorption in systems without Scale-Invariance

Suwunnarat,

Tang,

Reisner

et al. 2021

Preprint

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We experimentally and theoretically challenge the concept of coherent perfect absorption (CPA) as a narrow frequency resonant mechanism associated with scattering processes that respect scaleinvariance. Using a microwave platform, consisting of a lossy nonlinear resonator coupled to two interrogating antennas, we show that a coherent incident excitation can trigger a self-induced perfect absorption once its intensity exceeds a critical value. Importantly, a (near) perfect absorption persists for a broad band frequency range around the nonlinear CPA condition. Its origin is traced to a quartic behavior that the absorbance spectrum acquires in the proximity of a CPA associated with a new kind of exceptional point degeneracy related to the zeros of the nonlinear scattering operator.

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Non-Hermitian CT -Symmetric Spectral Protection of Nonlinear Defect Modes

Cited by 15 publications

References 40 publications

Ceramic‐based dielectric metamaterials

Ceramic‐based dielectric metamaterials

Design and verification of a high bandwidth metamaterial based on daily ceramics and its thermal conductivity

Towards a Broad-Band Coherent Perfect Absorption in systems without Scale-Invariance

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