Broadband cross-circular polarization carpet cloaking based on a phase change material metasurface in the mid-infrared region

Fang, Bo; Feng, Dantian; Chen, Peng; Shi, Lijiang; Cai, Jun; Li, Jianmin; Li, Chenxia; Hong, Zhi; Jing, Xufeng

doi:10.1007/s11467-021-1148-8

Cited by 50 publications

(21 citation statements)

References 59 publications

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“…A numerical simulation of a single silicon pillar was performed using the finite-difference time-domain method to obtain the electric field intensity distribution results of a single pillar, as shown in Figure 2. This unit can realize that a function similar to that of the F-P resonant cavity [64][65][66][67][68][69][70][71][72] confines the energy of the incident beam in the cylinder, and uses the resonance to enhance it. The honeycomb arrangement can increase the distance between columns in the same area [18] and reduce coupling.…”

Section: Metasurface Unit and Principlementioning

confidence: 99%

“…We use the superposition of the transmission phase and geometric phase to control the polarization state and focusing properties of the electromagnetic wavefront. [57][58][59][60][61][62] Based on the flexible control of polarization and phase and the high transmission efficiency of metasurfaces [63][64][65][66] a series of multifunctional transmissive metasurfaces was designed in the terahertz band using silicon materials, and the performance effects were verified by numerical simulation. The principles of transmission and geometric phases are used in the design of metasurfaces to achieve flexible control of the wavefront phase and polarization of different beams.…”

Section: Introductionmentioning

confidence: 99%

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Flexible Control of Phase and Polarization based on All‐Dielectric Metamaterials

Zhang

et al. 2023

Adv Quantum Tech

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A metasurface is a planar structure that can flexibly control the polarization, phase, and amplitude of incident electromagnetic waves. An all‐dielectric hexagonal cell structure to reduce the interaction between cells and achieve efficient parametric regulation of electromagnetic waves is proposed. The single resonant transmission phase and the geometric phase are superimposed to realize the composite phase unit structure and construct a multifunctional flat metasurface device. The designed metasurface can flexibly tune the phase and polarization of incident electromagnetic waves and enable multifunctional integration phenomena, such as polarization separation, light intensity convergence, and vector light generation, on a single metasurface.

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Section: Metasurface Unit and Principlementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Flexible Control of Phase and Polarization based on All‐Dielectric Metamaterials

Zhang

et al. 2023

Adv Quantum Tech

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“…In recent years, the research and application of metasurfaces are more extensive, and the development prospects are also broader. [ 25–44 ] Metasurfaces can be well used in beam separation, abnormal beam deflection, polarization conversion, stealth devices, holography and other fields. [ 45–60 ]…”

Section: Introductionmentioning

confidence: 99%

Transmitted Electromagnetic Beam Steering of Pyramid All‐Dielectric Encoding Surface Microstructure

Zhao,

Zhang,

Fang

et al. 2023

Adv Quantum Tech

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A transmission‐type all‐medium element is proposed to construct a coded metasurface. Due to the single‐layer metasurface unit structure, large reflection loss will be caused when the base plane is incident. In order to improve the efficiency of the coded metasurface device and reduce the reflection loss, the authors propose a double‐sided metasurface digital unit structure and introduces a wideband anti‐reflection pyramid microstructure to achieve significantly improved transmission characteristics. The optimized unit structure is coded and the coded metasurface is constructed. Different coding metasurface sequences are constructed based on 1‐bit, 2‐bit, and 3‐bit digital coding units. According to generalized Snell's law, the number of transmitted beams can be controlled. The authors introduce complex code addition theory to construct multifunctional beam control metasurface. Based on the far field scattering theory of metasurface, the addition theory of different sequences of transmission‐coded metasurface is analyzed. The addition operation of the superposition of two sets of symmetric double beams and two sets of ordinary double beams can be realized. Based on the analysis of far‐field scattering characteristics, the multifunctional coded metasurface is demonstrated, that is, multiple functions are simultaneously superimposed in one array without interference.

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“…Due to the weak coupling between lights and chiral molecules, chiral molecules show weak CD effects. However, the artificial chiral nanostructures can be strongly coupled with light, which leads to their CD signals being stronger than the CD signals of chiral molecules by several orders of magnitude. ,, Therefore, artificial chiral nanostructures provide a new platform for chiral catalysis, chiral molecular sensings, ,, and circularly polarized device design …”

Section: Introductionmentioning

confidence: 99%

“…2,3,6 Therefore, artificial chiral nanostructures provide a new platform for chiral catalysis, 7 chiral molecular sensings, 3,6,8 and circularly polarized device design. 9 Nowadays, researchers have proposed a variety of chiral nanostructures to study the mechanism of the CD effect and how to obtain strong CD signals. The main reason for the CD effect is the near-field coupling between electric dipoles and magnetic dipoles in artificial chiral nanostructures.…”

Section: Introductionmentioning

confidence: 99%

Enhancement and Sensing Application of Ultra-Narrowband Circular Dichroism in the Chiral Nanostructures Based on Monolayer MoS₂ and a Distributed Bragg Reflector

Wang

et al. 2022

ACS Appl. Mater. Interfaces

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Narrowband circular dichroism (CD) has aroused wide concerns in high-sensitivity detections of chiral molecular and chiral catalysis. Nevertheless, the dynamical adjustment of ultranarrowband (UNB) CD signals is hard to achieve. In this work, single-layer molybdenum disulfide (MoS 2 ), vanadium dioxide (VO 2 ), and a distributed Bragg reflector (DBR) are introduced into X-shaped chiral nanostructures (XCNs) for overcoming the above challenge. The simulation results show that XCNs can generate four strong UNB CD signals in the near-infrared band, and XCNs/MoS 2 can further enhance the UNB CD signals. The full width at half-minimum of UNB CD signals can reach 0.14 nm. The electric field distributions of XCNs/MoS 2 show that the four CD signals originate from the coupling between the guided mode resonances along the x and y axes in the VO 2 layer and the Tamm plasmon polaritons along the x and y axes in the DBR layer. Four UNB CD peaks can be actively tuned by varying the structural parameters, the number of MoS 2 layers, and the environmental temperature. The FOM of XCNs/MoS 2 can reach 1487 by changing the refractive index of the DRB layers. These findings contribute to the design of UNB chiral devices and provide new possibilities for environmental monitoring and ultrasensitive detection of chiral molecules.

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Broadband cross-circular polarization carpet cloaking based on a phase change material metasurface in the mid-infrared region

Cited by 50 publications

References 59 publications

Flexible Control of Phase and Polarization based on All‐Dielectric Metamaterials

Flexible Control of Phase and Polarization based on All‐Dielectric Metamaterials

Transmitted Electromagnetic Beam Steering of Pyramid All‐Dielectric Encoding Surface Microstructure

Enhancement and Sensing Application of Ultra-Narrowband Circular Dichroism in the Chiral Nanostructures Based on Monolayer MoS₂ and a Distributed Bragg Reflector

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Broadband cross-circular polarization carpet cloaking based on a phase change material metasurface in the mid-infrared region

Cited by 50 publications

References 59 publications

Flexible Control of Phase and Polarization based on All‐Dielectric Metamaterials

Flexible Control of Phase and Polarization based on All‐Dielectric Metamaterials

Transmitted Electromagnetic Beam Steering of Pyramid All‐Dielectric Encoding Surface Microstructure

Enhancement and Sensing Application of Ultra-Narrowband Circular Dichroism in the Chiral Nanostructures Based on Monolayer MoS2 and a Distributed Bragg Reflector

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Enhancement and Sensing Application of Ultra-Narrowband Circular Dichroism in the Chiral Nanostructures Based on Monolayer MoS₂ and a Distributed Bragg Reflector