飞秒光镊技术及其发展

激光捕获技术是利用光辐射力来捕捉、移动和操纵微粒的先进技术。飞秒光镊在实现粒子微纳操纵的同时还伴随着非线性现象的发生。阐述了飞秒光镊的模型和原理以及系统的各种结构形式,包括单光束梯度力光阱、贝塞耳光阱、双光束光纤光阱和冲击波光阱几种形式,并分析了每种形式的特点。

Principles and development of femtosecond optical tweezers technique

Laser trapping is an advanced technique that utilizes radiation force to capture,translate and manipulate micro- scopic particles.Femtosecond laser is used for optical tweezing and to induce nonlinear multi-photon processes simultaneously. The models and principles of femtosecond optical tweezers technique are reviewed.Various system setups of femtosecond optical tweezers are described respectively,such as single beam gradient force optical trap,Bessel optical trap,dual-beam fiber optical trap and femtosecond laser-induced shockwave optical trap.The characteristics of each approach are analyzed.