ICFO-Institut de Ciencies Fotoniques, The Barcelona Institute of Science and Technology, Castelldefels, Barcelona 08860, Spain.
Physics Department, Harvard University, Cambridge, Massachusetts 02138, USA.
Nat Commun. 2017 May 9;8:15141. doi: 10.1038/ncomms15141.
Nano-mechanical resonators have gained an increasing importance in nanotechnology owing to their contributions to both fundamental and applied science. Yet, their small dimensions and mass raises some challenges as their dynamics gets dominated by nonlinearities that degrade their performance, for instance in sensing applications. Here, we report on the precise control of the nonlinear and stochastic bistable dynamics of a levitated nanoparticle in high vacuum. We demonstrate how it can lead to efficient signal amplification schemes, including stochastic resonance. This work contributes to showing the use of levitated nanoparticles as a model system for stochastic bistable dynamics, with applications to a wide variety of fields.
纳米机械谐振器在纳米技术中变得越来越重要，因为它们为基础科学和应用科学都做出了贡献。然而，由于其动力学受到非线性的支配，这会降低它们的性能，例如在传感应用中，它们的小尺寸和质量带来了一些挑战。在这里，我们报告了在高真空下悬浮纳米粒子的非线性和随机双稳态动力学的精确控制。我们展示了它如何能够导致有效的信号放大方案，包括随机共振。这项工作有助于展示悬浮纳米粒子作为随机双稳态动力学模型系统的应用，适用于各种领域。
