Su Ning, Zhang Weiming, Zeng Xintao, Wu Pinghui, Cui Lina, Chen Xiaohui
Key Laboratory of Information Functional Material for Fujian Higher Education, Quanzhou Normal University, Quanzhou 362000, China.
College of Textiles and Apparel, Quanzhou Normal University, Quanzhou 362000, China.
Materials (Basel). 2023 Nov 17;16(22):7209. doi: 10.3390/ma16227209.
We propose a novel micro-nano structure that can realize a photonic nanojet (PNJ) switch by adjusting the temperature, which is composed of a truncated cylinder coated with a thin vanadium dioxide (VO) film. The influence of temperature on the maximum strength, full width at half maximum (FWHM), working distance, and focal length of the PNJ were studied by finite-difference time-domain (FDTD) method. The results demonstrate that the structure can adjust the open and close state of the PNJ by changing the temperature. A PNJ with varying characteristics can be obtained at both high and low temperatures, and the maximum intensity ratio of the PNJ can reach up to 7.25. This discovery provides a new way of optical manipulation, sensing and detection, microscopy imaging, optoelectronic devices, and other fields.
我们提出了一种新型的微纳结构，它可以通过调节温度来实现光子纳米射流（PNJ）开关，该结构由涂有二氧化钒（VO）薄膜的截顶圆柱体组成。采用时域有限差分（FDTD）方法研究了温度对PNJ的最大强度、半高宽（FWHM）、工作距离和焦距的影响。结果表明，该结构可以通过改变温度来调节PNJ的开合状态。在高温和低温下都可以获得具有不同特性的PNJ，并且PNJ的最大强度比可达7.25。这一发现为光学操纵、传感与检测、显微镜成像、光电器件等领域提供了一种新方法。
