Optical micromanipulation using nonliner photo-responses
Optical micromanipulation using nonliner photo-responses
复制标题
使用非线性光响应的光学显微操作
DOI：
10.1117/12.2573529
复制
发表时间：
2020
期刊：
影响因子：
--
通讯作者：
Miyasaka Hiroshi
中科院分区：
文献类型：
--
作者：
Ito Syoji;Nakamura Shinya;Hayasaka Mizuki;Koga Masafumi;Setoura Kenji;Sotome Hikaru;Miyasaka Hiroshi
在本研究中，我们已经检测到多光子吸收力作用于微粒由于同时双光子吸收。利用飞秒脉冲对（800 nm，100 fs）对水分子中的染料分子进行光学捕获。在Δt>脉冲宽度的条件下，粒子通过多光子过程吸收少量光子而被捕获。通过同时双光子吸收吸收的光子数量通过减小Δ来增加以与脉冲对重叠，从而导致颗粒的微机械运动。通过跟踪被捕获粒子的位置，我们证实了粒子被推向光传播的方向，并且位移随着Δt的减小而增大。
In the present study, we have detected multiphoton absorption force acting on microparticles due to simultaneous twophoton absorption. A polymer microparticle including dye molecules was optically trapped with femtosecond (800 nm, 100 fs) pulse pairs with time-interval Δtin water. Under the condition that Δt> the pulse duration, the particle was trapped with absorbing small number of photons via multiphoton process. The number of photons absorbed via simultaneous two-photon absorption increased by decreasing Δtto overlap the pulse pair, leading to the micromechanical motion of the particle. By tracking the position of the trapped particle, we confirmed that the particles were pushed in the direction of light propagation and the displacement increased with decreasing Δt.