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Tunable VO2 cavity enables multispectral manipulation from visible to microwave frequencies
Light: Science & Applications ( IF 19.4 ) Pub Date : 2024-02-21 , DOI: 10.1038/s41377-024-01400-w
Hang Wei , Jinxin Gu , Tao Zhao , Zhiyuan Yan , He-Xiu Xu , Shuliang Dou , Cheng-Wei Qiu , Yao Li

Optical materials capable of dynamically manipulating electromagnetic waves are an emerging field in memories, optical modulators, and thermal management. Recently, their multispectral design preliminarily attracts much attention, aiming to enhance their efficiency and integration of functionalities. However, the multispectral manipulation based on these materials is challenging due to their ubiquitous wavelength dependence restricting their capacity to narrow wavelengths. In this article, we cascade multiple tunable optical cavities with selective-transparent layers, enabling a universal approach to overcoming wavelength dependence and establishing a multispectral platform with highly integrated functions. Based on it, we demonstrate the multispectral (ranging from 400 nm to 3 cm), fast response speed (0.9 s), and reversible manipulation based on a typical phase change material, vanadium dioxide. Our platform involves tandem VO2-based Fabry–Pérot (F-P) cavities enabling the customization of optical responses at target bands independently. It can achieve broadband color-changing capacity in the visible region (a shift of ~60 nm in resonant wavelength) and is capable of freely switching between three typical optical models (transmittance, reflectance, and absorptance) in the infrared to microwave regions with drastic amplitude tunability exceeding 0.7. This work represents a state-of-art advance in multispectral optics and material science, providing a critical approach for expanding the multispectral manipulation ability of optical systems.



中文翻译:

可调谐 VO2 腔可实现从可见光到微波频率的多光谱操作

能够动态操纵电磁波的光学材料是存储器、光调制器和热管理领域的一个新兴领域。最近,它们的多光谱设计初步引起了广泛关注,旨在提高其效率和功能集成。然而,基于这些材料的多光谱操纵具有挑战性,因为它们普遍存在的波长依赖性限制了它们窄波长的能力。在本文中,我们将多个可调谐光学腔与选择性透明层级联,从而提供了一种克服波长依赖性的通用方法,并建立了具有高度集成功能的多光谱平台。在此基础上,我们展示了基于典型相变材料二氧化钒的多光谱(范围从400 nm到3 cm)、快速响应速度(0.9 s)和可逆操纵。我们的平台涉及基于串联 VO 2的法布里-珀罗 (FP) 腔,能够独立定制目标频段的光学响应。它可以在可见光区域实现宽带变色能力(谐振波长偏移~60 nm),并且能够在红外到微波区域的三种典型光学模型(透射率、反射率和吸收率)之间自由切换,并具有剧烈的变化。幅度可调性超过0.7。这项工作代表了多光谱光学和材料科学的最新进展,为扩展光学系统的多光谱操纵能力提供了关键方法。

更新日期:2024-02-21
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