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arXiv 2602.11535physics.optics
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基于相变共振超材料的可切换高Q因子光吸收体

Switchable high-Q light absorbers based on phase-change resonant metasurfaces

China University of Mining and Technology(中国矿业大学);Ningbo University(宁波大学)

Kai Qi, Guoxiang Wang, Xiang Shen, Yixiao Gao

AI总结:

基于相变材料的可重构超材料实现可切换高Q因子光吸收,可在非晶态和晶态间切换,应用于光电探测和热辐射控制。

摘要:

本文提出了一种基于可重构超材料的可切换高Q因子光吸收体,该超材料由低损耗相变材料(PCM)驱动。通过利用引导模共振与法布里-珀罗模式之间的耦合,由嵌入PCM的相变动力学介导,共振Q因子可以被主动调节。这使得系统能够从由束缚态在连续体物理规律支配的完美暗态切换到具有有限Q因子的临界耦合共振态。因此,该超材料在非晶态下表现出完美吸收,在晶态下则表现出反射主导的响应。所提出的超材料在多种纳米光子应用中具有广阔前景,包括光电探测和热辐射控制。

英文摘要:

In this paper, we propose a switchable high-Q light absorber based on a reconfigurable metasurface enabled by a lowloss phase-change material (PCM). By leveraging the coupling between guided-mode resonance and Fabry-Perot modes, mediated by the phase-transition dynamics of the embedded PCM, the resonance Q factor can be actively tuned. This allows the system to switch from a perfect dark state, governed by the physics of bound states in the continuum, to a critically coupled resonance with a finite Q factor. Consequently, the metasurface exhibits perfect absorption in the amorphous state and a reflection-dominated response in the crystalline state. The proposed metasurface holds significant potential for diverse nanophotonic applications, including photodetection and thermal emission control.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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