Key Lab of In-fiber Integrated Optics, Ministry Education of China, College of Science, Harbin Engineering University, 150001 Harbin, China.
Laboratory of Artificial-Intelligence Nanophotonics, School of Science, RMIT University, Melbourne VIC 3001, Australia.
Phys Rev Lett. 2018 Sep 28;121(13):133901. doi: 10.1103/PhysRevLett.121.133901.
We demonstrate a new principle of the laser-induced hammer-hit vibration of a micron-sized black sphere in liquid glycerol with a single divergent Gaussian beam. The light-induced Δα-photophoretic force, which is significantly improved by the vibrating speed of the microparticle, is responsible for both the pushing and pulling force of the hammer-hit vibration. Our approach expands the optical manipulation of microparticle hammer-hit vibration to a liquid medium and provides full control over the trapped particles, including the adjustment of the vibration frequency, amplitude, and position.
我们展示了一种新的原理，即利用单束发散高斯光束在液体甘油中引发微米级黑色球体的激光诱导锤击振动。光致Δα光泳力通过微颗粒的振动速度得到显著增强，对锤击振动的推力和拉力都有贡献。我们的方法将微颗粒锤击振动的光操控扩展到液体介质中，并对被捕获的颗粒进行完全控制，包括调节振动频率、振幅和位置。
