Temperature-responded tunable metalenses based on phase transition materials
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Published:2021-11-24
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Volume:
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ISSN:1674-1056
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Container-title:Chinese Physics B
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language:
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Short-container-title:Chinese Phys. B
Author:
Wu Jingjun,Tang Feng,Ma Jun,Han Bing,Wei Cong,Li Qingzhi,Chen Jun,Zhang Ning,Ye Xin,Zheng Wanguo,Zhu Rihong
Abstract
Abstract
Once the metalenses are fabricated, the functions of most are invariable. The tunability and reconfigurability are useful and cost-saving for metalenses in realistic applications. We demonstrated this tunability here via a novel hybrid metalens with the strategic placement of an ultra-thin VO2 layer. The hybrid metalens is capable of dynamically modulating the focusing intensity of transmitted light at 1550 nm, and demonstrated a 42.28% focusing efficiency of the incident light and 70.01% modulation efficiency. The hybrid metalens’ optothermal simulations show the optothermal conversion progress of dynamic focusing, and the maximum laser density of 1.76×103 W/cm2 can be handled at an ambient temperature lower than 330 K. The hybrid metalens proposed in this work, a light-dose sensitive tunable smart metalens that can protect other instruments/systems or materials from damage, has its specific applications such as anti-satellite blinding, bio-imaging, etc.
Subject
General Physics and Astronomy
Cited by
2 articles.
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