Author Affiliations
Abstract
1 State Key Laboratory of Transient Optics and Photonics, Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences (CAS), Xi’an 710119, China
2 Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China
3 College of Information Science and Electronic Engineering, Zhejiang University, Hangzhou 310027, China
Silicon waveguides typically exhibit optical anisotropy, which leads to polarization correlation and single-polarization operations. This consequently creates a demand for polarization-control devices. This paper introduces a CMOS-compatible O-band reconfigurable TE/TM polarization rotator comprising two symmetrical polarization rotator–splitters and phase shifters. This configuration enables dynamic conversion of any linear polarization to its quadratic equivalent. Experimental results indicate that the reconfigurable polarization rotator exhibits an insertion loss of less than 1.5 dB. Furthermore, the bandwidth for a polarization extinction ratio beyond 15 dB exceeds 60 nm.
silicon-based optoelectronics polarization rotation polarization switch Chinese Optics Letters
2024, 22(1): 011303
1 无锡太湖学院江苏省物联网应用技术重点建设实验室, 江苏 无锡 214064
2 江南大学, 江苏 无锡214122
钛合金(TC4)具有良好的生物相容性、优异的力学性能及耐腐蚀等优点, 因此被作为医用人工关节材料, 但其较差耐磨损性能限制了其在临床医学应用方面的应用和发展。本文通过填充碳纳米管(CNTs), 采用激光增材制造(3D打印)技术成形CNTs/TC4复合材料, 并通过金相显微镜和排水法对其微观结构组织、孔隙率进行了研究, 并在模拟体液环境下, 对其生物摩擦学性能进行了分析。结果表明: 填充CNTs可以显著提高TC4基底的显微硬度, 当w(CNTs)=1.0%时, 显微硬度较纯TC4(328.3 HV0.2)提高了31.82%, 且随着CNTs含量的增加, CNTs/TC4复合材料的孔隙率逐渐增加, 其中1.5-CNTs/TC4孔隙率最大为9.64%, 而磨损体积却随着孔隙率的增加逐渐降低。
钛合金(TC4) 碳纳米管(CNTs) 激光增材制造 生物摩擦学 titanium alloy (TC4) carbon nanotubes 3D printing bio tribological
