Sun Peizhi, Wang Yifei, Yuan Conglong, Jia Shuzhen, Shen Dong, Zheng Zhigang
Opt Express. 2022 Aug 1;30(16):28506-28513. doi: 10.1364/OE.462908.
With spatially inhomogeneous polarization, vector beam (VB) has created substantial opportunities in both optics and photonics. However, the limited spectral bandwidth of VB generator hinders further advances for higher level of integration and functionality. Here, an innovative approach of programming the electric field vector of light is proposed to tailor arbitrary ultra-broadband VBs, in parallel among an unprecedented wavelength range over 1000 nm covering the visible and NIR band. We demonstrate the twisted nematic liquid crystals (TNLCs), specifically arranged in-situ by a dynamic programmable photopatterning, enable to directly manipulate the electric field vector of transmitted light into the VB as desired. Furthermore, the electrical responsiveness of TNLCs yields a dynamic multifunctionality between the VB and Gaussian beam. We anticipate this ultra-broadband VB generator would be promising for a variety of applications like optical manipulation, super-resolution imaging, and integrated optical communication system.
由于具有空间非均匀极化，矢量光束（VB）在光学和光子学领域都创造了大量机会。然而，VB发生器有限的光谱带宽阻碍了更高水平的集成和功能的进一步发展。在此，提出了一种对光的电场矢量进行编程的创新方法，以在覆盖可见光和近红外波段的超过1000 nm的前所未有的波长范围内并行定制任意超宽带VB。我们证明，通过动态可编程光图案化原位专门排列的扭曲向列型液晶（TNLC）能够根据需要将透射光的电场矢量直接操纵为VB。此外，TNLC的电响应性在VB和高斯光束之间产生了动态多功能性。我们预计这种超宽带VB发生器在诸如光学操纵、超分辨率成像和集成光通信系统等各种应用中将很有前景。
