Nonlinear nanomechanical resonators for quantum optoelectromechanics
Nonlinear nanomechanical resonators for quantum optoelectromechanics
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DOI：
10.1103/physreva.89.013854
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发表时间：
2012-06
影响因子：
2.9
通讯作者：
S. Rips;I. Wilson-Rae;I. Wilson-Rae;Michael J. Hartmann
中科院分区：
文献类型：
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作者：
S. Rips;I. Wilson-Rae;I. Wilson-Rae;Michael J. Hartmann
我们提出了一个方案，提高纳米机械谐振器的非谐性，使它们受到不均匀的静电场。我们表明，这种方法可以访问一个新的制度的光学力学，其中每量子的机械运动的非线性变得可比的线宽的光学腔。在这种解析的非线性机制中，机械谐振器的声子Fock态之间的跃迁可以被选择性地处理。作为一个应用程序，我们表明，我们的方法将允许在实验现实的设备准备固定的声子Fock态。这种状态显然是非经典的，因为它们表现出明显的负维格纳函数。我们计算的机械稳定状态，通过跟踪的腔模式在弱光-机械耦合的限制，并证实我们的结果，通过数值分析的全动态，包括腔模式。最后，我们证明了如何从弱共振探测激光的输出光谱中读出定态Wigner函数的负性，并分析了可能的原因
We present a scheme for enhancing the anharmonicity of nanomechanical resonators by subjecting them to inhomogenous electrostatic elds. We show that this approach enables access to a novel regime of optomechanics, where the nonlinearity per quanta of the mechanical motion becomes comparable to the linewidth of the optical cavities employed. In this \resolved nonlinearity regime" transitions between phonon Fock states of the mechanical resonator can be selectively addressed. As one application we show that our approach would allow to prepare stationary phonon Fock states in experimentally realistic devices. Such states are manifestly non-classical as they show pronounced negative Wigner functions. We calculate the mechanical steady state by tracing out the cavity modes in the weak optomechanical coupling limit and corroborate our results by a numerical analysis of the full dynamics including the cavity modes. Finally, we show how the negativity of the stationary states' Wigner function can be read o the output spectrum of a weak resonant probe laser and analyse possible