腔光力系统中声子的朗道-芝诺-斯塔博格干涉(特邀)

Landau-Zenner-Stückelberg interference of phonons in a cavity optomechanical systems(Invited)

微纳机械振子被认为是一种发展片上信号处理器件的理想平台,可以将各种不同的物理场转换为振动声子,实现基于声子的片上信息处理。其中,控制声子在不同机械振子间的传输是实现声子信息处理的关键。通过将两个机械振子耦合构造两模机械系统,目前虽然已经实现了不同杂化模式间声子的相干传输,但是依然缺乏直接调控两个独立机械振子有效耦合强度的方法。为此,文中在腔光力系统中开发了基于朗道-芝诺-斯塔博格(Landau-Zenner-Stückelberg,LZS)干涉的相干声子操控方法。在利用光学囚禁作用调控两个机械振子振动模式杂化的基础上,通过对囚禁光进行调制施加参量驱动场,使得系统周期性地穿过免交叉点实现了声子的LZS干涉。研究表明:在满足共振条件下,利用LZS干涉可以实现声子在两个独立机械振子间的相干传递。笔者的研究为实现声子信息在实空间的高效传递提供了一个有效途径。

Micro-nano mechanical resonators are believed to be an ideal platform for developing on-chip signal processing devices,in which various kinds of physical fields can be transduced to mechanical phonons for phonon-based information processing.In such a strategy,control of phonon transferring between different mechanical resonators is essential for phonon-based information processing.By coupling two mechanical resonators for a two-mode mechanical system,although coherent phonon transferring between hybridized mechanical modes has been achieved recently,direct control over the effective coupling between disparate mechanical resonators is still desirable.Therefore,coherent control of phonons through Landau-ZennerStückelberg(LZS) interference was developed in an optomechanical system in this paper.The hybridization between two mechanical resonators was mediated using the effect of optical trapping,and a parametric driving field was applied through modulating the optical trap so that the system transvered the avoided-crossing point periodically to realize the LZS interference of phonons.The studies demonstrate that coherent phonon transferring between two disparate mechanical resonators can be achieved through the LZS interference when the onresonance condition is satisfied.The authors’ research provides an efficient scheme for high-efficient transferring of phonon-based information in real space.