基于单光束梯度力光阱原理的微粒捕获装置研制

Development of Particle Capture Device Based on the Principle of Single-Beam Gradient Force Trap

光镊技术具有无损伤、快速灵敏地捕获微粒的特点,已被广泛应用于物理学、生物传感和化学等领域,但由于光镊是一种新兴技术,光学理论抽象繁琐,且光镊系统结构复杂,实验演示仪器贵重,因此,在现有物理实验课程教学中光镊实验演示仍然十分困难。本文聚焦于光镊在大学物理实验教学课程中的痛点问题,基于光镊的理论方法提出了一种基于单光束梯度力光阱原理的微粒捕获装置,通过实验演示和研究分析,得出实验现象符合光镊捕获微粒的研究规律,且能够观察到明显的粒子捕获过程的结论。基于单光束梯度力光阱原理的微粒捕获装置体积小巧,经济实用,适合在大学物理实验课程中推广应用。

optical theory is complicated,the structure of optical tweezers system is complex,and experimental demonstration instruments are expensive.Therefore,it is still very difficult to demonstrate optical tweezers experiments in the teaching of existing physics laboratory courses.It focuses on the difficult problems of optical tweezers in university physics experimental teaching courses,and proposes a particle capture device based on the principle of single-beam gradient force optical trap by using the theoretical method of optical tweezers,and concludes that the experimental phenomenon conforms to the research law of optical tweezers capturing particles through experimental demonstration research and analysis,and obvious particle capture process can be observed.Based on the principle of single-beam gradient force trap,the particle capture device is compact,economical and practical,and more suitable for promotion and application in university physics experimental courses.