中国物理B ›› 2022, Vol. 31 ›› Issue (5): 54216-054216.doi: 10.1088/1674-1056/ac3cad
Jing-Jun Wu(伍景军)1,2,3, Feng Tang(唐烽)3, Jun Ma(马骏)1,2, Bing Han(韩冰)1,2, Cong Wei(魏聪)1,2, Qing-Zhi Li(李青芝)3, Jun Chen(陈骏)3, Ning Zhang(张宁)3, Xin Ye(叶鑫)3,†, Wan-Guo Zheng(郑万国)‡4,‡, and Ri-Hong Zhu(朱日宏)1,2,§
Jing-Jun Wu(伍景军)1,2,3, Feng Tang(唐烽)3, Jun Ma(马骏)1,2, Bing Han(韩冰)1,2, Cong Wei(魏聪)1,2, Qing-Zhi Li(李青芝)3, Jun Chen(陈骏)3, Ning Zhang(张宁)3, Xin Ye(叶鑫)3,†, Wan-Guo Zheng(郑万国)‡4,‡, and Ri-Hong Zhu(朱日宏)1,2,§
摘要: Once the metalenses are fabricated, the functions of most metalenses are invariable. The tunability and reconfigurability are useful and cost-saving for metalenses in realistic applications. We demonstrate 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 a wavelength of 1550 nm, and demonstrate a 42.28% focusing efficiency of the incident light and 70.01% modulation efficiency. The hybrid metalens' optothermal simulations show an optothermal conversion process of dynamic focusing, and a 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 being damaged, has its specific applications such as in anti-satellite blinding, bio-imaging, etc.
中图分类号: (Optical coatings)