Gieseler Jan, Spasenović Marko, Novotny Lukas, Quidant Romain
ICFO-Institut de Ciencies Fotoniques, Mediterranean Technology Park, 08860 Castelldefels (Barcelona), Spain.
ICFO-Institut de Ciencies Fotoniques, Mediterranean Technology Park, 08860 Castelldefels (Barcelona), Spain and Institut of Physics, University of Belgrade, Pregrevica 118, 11080 Belgrade, Serbia.
Phys Rev Lett. 2014 Mar 14;112(10):103603. doi: 10.1103/PhysRevLett.112.103603. Epub 2014 Mar 12.
We study the dynamics of a laser-trapped nanoparticle in high vacuum. Using parametric coupling to an external excitation source, the linewidth of the nanoparticle's oscillation can be reduced by three orders of magnitude. We show that the oscillation of the nanoparticle and the excitation source are synchronized, exhibiting a well-defined phase relationship. Furthermore, the external source can be used to controllably drive the nanoparticle into the nonlinear regime, thereby generating strong coupling between the different translational modes of the nanoparticle. Our work contributes to the understanding of the nonlinear dynamics of levitated nanoparticles in high vacuum and paves the way for studies of pattern formation, chaos, and stochastic resonance.
我们研究了高真空中激光捕获纳米粒子的动力学。通过与外部激发源的参数耦合，纳米粒子振荡的线宽可降低三个数量级。我们表明，纳米粒子的振荡与激发源同步，呈现出明确的相位关系。此外，外部源可用于可控地将纳米粒子驱动到非线性区域，从而在纳米粒子的不同平移模式之间产生强耦合。我们的工作有助于理解高真空中悬浮纳米粒子的非线性动力学，并为图案形成、混沌和随机共振的研究铺平了道路。
