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基于动态多焦点双光子聚合的微螺旋结构制备 被引量:4
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作者 谢辰 孙世贤 +1 位作者 贾而穑 胡明列 《中国激光》 EI CAS CSCD 北大核心 2023年第24期200-207,共8页
微螺旋结构在微机器人、手性超材料中有重要应用,不同的应用对螺旋结构有着不一样的要求。基于飞秒激光双光子聚合技术可以直写任意三维微结构,然而,单焦点逐点直写的效率较低。基于结构光场的单步曝光方案能够实现高效制备,但目前受限... 微螺旋结构在微机器人、手性超材料中有重要应用,不同的应用对螺旋结构有着不一样的要求。基于飞秒激光双光子聚合技术可以直写任意三维微结构,然而,单焦点逐点直写的效率较低。基于结构光场的单步曝光方案能够实现高效制备,但目前受限于复杂而专业的光场调控技术,仅能制备较有限的微螺旋结构。针对微尺度多螺旋结构,本文提出了一种基于动态多焦点的制备方案。该方案将光斑的螺旋运动轨迹分解为由动态全息图控制的圆周运动和由z轴位移台控制的线性扫描,最终成功制备了直径、螺线数、螺距与手性等特征灵活可控的多重微螺旋结构。所提微螺旋结构制备方案兼具经济性及高效灵活的优势,对于微机器人、手性超材料和生物工程等领域的相关研究具有较大的参考价值。 展开更多
关键词 激光技术 微螺旋 双光子聚合 多焦点 空间光调制器
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Large area crystalline Weyl semimetal with nano Au film based micro-fold line array for THz detector 被引量:2
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作者 SONG Qi ZHOU Yu +3 位作者 jia erse WANG jiaTong ZHANG Min ZHANG BingYuan 《Science China(Technological Sciences)》 SCIE EI CAS CSCD 2023年第11期3267-3275,共9页
The advancement of 6G technology relies on the development of high-performance terahertz detectors that can operate at room temperature.These detectors are crucial for Internet of Things(Io T)applications,which requir... The advancement of 6G technology relies on the development of high-performance terahertz detectors that can operate at room temperature.These detectors are crucial for Internet of Things(Io T)applications,which require sensitive environmental sensing and efficient reception of 6G signals.One significant research focus is on detection technology with high responsiveness and low equivalent noise power for 6G signals,which experience high losses in the air.To meet the demand for ultra-sensitive detectors in 6G technology,we have employed several techniques.Firstly,we prepared a large area of Weyl-semimetal layer through magnetron sputtering.Secondly,we obtained a high-quality Weyl-semimetal active layer by carefully controlling the annealing conditions.Next,a thin nano-Au layer was introduced as a micro-cavity reflection layer to enhance the device's detection rate.Additionally,we incorporated an electromagnetic induction well to improve carrier confinement and enhance the detection sensitivity.This proposed high-performance terahertz detector,with its potential for industrial production,offers a valuable technical solution for the advancement of 6G technology. 展开更多
关键词 MICRO-CAVITY Weyl semimetal crystalline thin film THz device
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