A reflective beam splitter is proposed and verified. The unit cell of the beam splitter is composed of a metal pattern, a dielectric substrate, and a metallic ground. Each subarray structure of the device is composed ...A reflective beam splitter is proposed and verified. The unit cell of the beam splitter is composed of a metal pattern, a dielectric substrate, and a metallic ground. Each subarray structure of the device is composed of four unit cells, which are gradually rotated at 45°. The horizontal and vertical subarrays form a 4×4 gradient metasurface supercell. In the operating frequency band, the incident linearly polarized terahertz wave is reflected and divided into four beams of approximately equal power but different propagation directions. The proposed terahertz beam splitter based on metasurface has the advantages of small size, low cost and easy processing, and can be applied to terahertz stealth and imaging.展开更多
The beam splitter is one of the most crucial components in optical and electromagnetic systems,and it is also expected to be applied in terahertz(THz)technology.However,most existing beam splitters operate in only a s...The beam splitter is one of the most crucial components in optical and electromagnetic systems,and it is also expected to be applied in terahertz(THz)technology.However,most existing beam splitters operate in only a single working mode,restricting their applications.This paper reports a method for the inverse design of a doublet meta-device consisting of two stacked metasurfaces functioning as a reconfigurable THz beam splitter.It is made of photo-curable high-temperature resin using 3D printing technology.By simply adjusting the relative rotation angles between the two metasurfaces to 0°,90°,180°,and 270°,the meta-device can produce four distinct focal patterns,thus achieving four different working modes.This scheme avoids introducing complicated active components,offering a simple,low-cost design of a signal divider in future 6G THz communication systems.展开更多
讨论了一种用于DWDM系统中的光开关、偏振无关隔离器等单元器件中的微小薄膜型偏振分束器制造的关键技术。光学膜层采用数学多重优化设计方法;采用Monte Carlo允差分析原理分析膜层的容差,以便选择更易制备的膜系;计算膜层的M ac leod...讨论了一种用于DWDM系统中的光开关、偏振无关隔离器等单元器件中的微小薄膜型偏振分束器制造的关键技术。光学膜层采用数学多重优化设计方法;采用Monte Carlo允差分析原理分析膜层的容差,以便选择更易制备的膜系;计算膜层的M ac leod极值灵敏度,得到所选膜系各个膜层的误差要求;模拟光学监控过程,以制定相应的膜厚监控策略。设计了实用的棱镜胶合装置,得到了较高技术指标的PBS棱镜。结果表明,棱镜的光学冷加工,是器件制造的基础;光学薄膜的设计与制备是器件制造的关键,也是难点;棱镜的胶合是器件不可忽视的环节。展开更多
基金supported by the New Direction Cultivation Project of Chongqing University of Posts and Telecommunications (No.A2014-116)the Key Research Program of Chongqing University of Posts and Telecommunications on Interdisciplinary and Emerging Field (No.A2018-01)。
文摘A reflective beam splitter is proposed and verified. The unit cell of the beam splitter is composed of a metal pattern, a dielectric substrate, and a metallic ground. Each subarray structure of the device is composed of four unit cells, which are gradually rotated at 45°. The horizontal and vertical subarrays form a 4×4 gradient metasurface supercell. In the operating frequency band, the incident linearly polarized terahertz wave is reflected and divided into four beams of approximately equal power but different propagation directions. The proposed terahertz beam splitter based on metasurface has the advantages of small size, low cost and easy processing, and can be applied to terahertz stealth and imaging.
基金National Natural Science Foundation of China(62231001)Hong Kong Research Grants Council Collaborative Research Fund(C1009-22G)。
文摘The beam splitter is one of the most crucial components in optical and electromagnetic systems,and it is also expected to be applied in terahertz(THz)technology.However,most existing beam splitters operate in only a single working mode,restricting their applications.This paper reports a method for the inverse design of a doublet meta-device consisting of two stacked metasurfaces functioning as a reconfigurable THz beam splitter.It is made of photo-curable high-temperature resin using 3D printing technology.By simply adjusting the relative rotation angles between the two metasurfaces to 0°,90°,180°,and 270°,the meta-device can produce four distinct focal patterns,thus achieving four different working modes.This scheme avoids introducing complicated active components,offering a simple,low-cost design of a signal divider in future 6G THz communication systems.
文摘讨论了一种用于DWDM系统中的光开关、偏振无关隔离器等单元器件中的微小薄膜型偏振分束器制造的关键技术。光学膜层采用数学多重优化设计方法;采用Monte Carlo允差分析原理分析膜层的容差,以便选择更易制备的膜系;计算膜层的M ac leod极值灵敏度,得到所选膜系各个膜层的误差要求;模拟光学监控过程,以制定相应的膜厚监控策略。设计了实用的棱镜胶合装置,得到了较高技术指标的PBS棱镜。结果表明,棱镜的光学冷加工,是器件制造的基础;光学薄膜的设计与制备是器件制造的关键,也是难点;棱镜的胶合是器件不可忽视的环节。
