Reconfigurable chiral metasurface based on vanadium dioxide: Modulation of phase and intensity for high-quality hologram and near-field imaging

Gao, Peng; Chen, Cong; Dai, Yaowei; Wang, Xiaolin; Liu, Hai

doi:10.1016/j.optmat.2023.114448

Cited by 1 publication

(1 citation statement)

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“…In addition, there have been some exciting related works proposed for near-field imaging based on the phase change materials. For example, Gao et al proposed a reconfigurable chiral metamaterial based on the phase change material of VO 2 , which utilized the dual-THz band CD effect to achieve near-field imaging at 3.47 THz and 6.75 THz [38]. Xiong et al designed and investigated a temperature tunable chiralityselective meta-absorber based on the phase change material of VO 2 , achieving tunable near-field imaging of letters and response code with information hiding characteristics [39].…”

Section: Introductionmentioning

confidence: 99%

Thermally Controlled Broadband Ge2Sb2Te5-Based Metamaterial Absorber for Imaging Applications

Qiu,

Jin,

Tang

2024

Photonics

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In this paper, we theoretically and numerically demonstrate a thermally controlled broadband absorber based on the phase change material Ge2Sb2Te5 (GST). When GST operates in the amorphous state, the proposed metamaterial acts as a broadband nearly perfect absorber. The absorption can reach more than 90% in the wavelength range from 0.9 to 1.41 μm. As an application of the GST-based metamaterial absorber, the near-field imaging effect is achieved by using the intensity difference of optical absorption. Moreover, the thermally controlled switchable imaging can be performed by changing the phase transition characteristics of GST, and the imaging quality and contrast can be adjusted by changing the geometrical parameters. This designed metamaterial may have potential applications in near-infrared temperature control imaging, optical encryption, and information hiding.

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Section: Introductionmentioning

confidence: 99%