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| 1 | 飞秒激光辐照诱导光致变色玻璃中的上转换发光可逆调控和3D光学信息存储显示文摘快速响应、高发光对比度、三维存储和信息无损读取是光致变色材料光存储应用的几个关键因素.具有多光子非线性吸收的飞秒激光直写技术以其加工速度快、加工精度高等独特优势,正成为玻璃三维空间微加工功能单元的有效工具.本工作研究了800 nm飞秒激光照射下稀土离子掺杂透明玻璃的光致变色性质,结果证实在800 nm飞秒激光辐照下玻璃展现了快速光致变色响应.在光致变色玻璃中实现了92%的上转换发光调控.光致变色玻璃可通过热刺激漂白回原色,在800 nm飞秒激光辐照和热处理交替刺激下,光致变色玻璃的透射率和上转换调控表现出良好的重现性.通过800 nm飞秒激光照射,可将数据信息写入透明玻璃内部,实现三维信息存储.结果表明,800 nm飞秒激光辐照诱导的光致变色玻璃是理想的光学数据存储介质. | 肖代文 黄雄健 寸阳珂 胡振 徐赞 白雪 字映竹 付丽香 Asif Ali Haider 邱建备 宋志国 董国平 杨正文 | 2022 | Science China Materials2022，65，6： | 1 |
| 2 | Topology-empowered membrane devices for terahertz photonics显示文摘Control of terahertz waves offers a profound platform for next-generation sensing,imaging,and information communications.However,all conventional terahertz components and systems suffer from bulky design,sensitivity to imperfections,and transmission loss.We propose and experimentally demonstrate onchip integration and miniaturization of topological devices,which may address many existing drawbacks of the terahertz technology.We design and fabricate topological devices based on valley-Hall photonic structures that can be employed for various integrated components of on-chip terahertz systems.We demonstrate valleylocked asymmetric energy flow and mode conversion with topological waveguide,multiport couplers,wave division,and whispering gallery mode resonators.Our devices are based on topological membrane metasurfaces,which are of great importance for developing on-chip photonics and bring many features into terahertz technology. | Quanlong Yang Dongyang Wang Sergey Kruk Mingkai Liu Ivan Kravchenko Jiaguang Han Yuri Kivshar Ilya Shadrivov | 2022 | Advanced Photonics2022，4，4： | 0 |
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