可切换的光学捕获基于由极化多重复合的介电元表面产生的旋对束
Hongliang Li1,2, Jisen Wen3, Song Gao4
1Department of Electronic Engineering, Kwangwoon University, Seoul, 01897, South Korea. slee@kw.ac.kr.
Nanoscale
|October 16, 2023
概括
研究人员开发了一种新的可切换光学捕获方法,使用超表面控制微粒. 这种技术使灵活的操纵和同时捕获多个粒子成为可能,从而推进了光学捕获应用.
科学领域:
- 光学和光子学 在光学和光子学.
- 材料科学 材料科学 材料科学
- 纳米技术纳米技术
背景情况:
- 光学陷对于微粒子操纵至关重要,但在多粒子处理和集成方面面临局限性.
- 现有的方法在灵活控制和同时捕获多个微粒方面存在困难.
研究的目的:
- 提出和演示可切换的微粒光学捕获方案.
- 为了克服多粒子捕获和灵活操纵的局限性,使用一种新的光学设置.
主要方法:
- 制造和描述由二氧化纳米柱组成的微型全介电超表面.
- 通过超表面生成极化调节的双重旋对光束.
- 通过调整极化 (横向电和横向磁) 和束属性来证明可切换的捕捉.
主要成果:
- 超表面成功地产生了可调节的旋对束,具有可控制的拓电荷和相位奇点分离.
- 在横向电极化下,通过对立的拓电荷旋对实现了单个微粒捕获.
- 在横向磁极化下,与相同的拓电荷旋对同时捕捉两个微粒被证明.
结论:
- 拟议的可切换光学捕获方案为多个粒子提供了增强的集成和灵活的操纵功能.
- 这项技术在生物物理学,纳米技术和光子学方面的应用具有重大潜力.
- 可调节偏振的超表面为先进的光学操纵技术提供了一个多功能平台.
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