Key Laboratory of Quantum Information, University of Science and Technology of China, Chinese Academy of Sciences , Hefei 230026, China.
Synergetic Innovation Center of Quantum Information and Quantum Physics, University of Science and Technology of China , Hefei, Anhui 230026, China.
Nano Lett. 2017 Feb 8;17(2):915-921. doi: 10.1021/acs.nanolett.6b04223. Epub 2017 Jan 11.
Phonon-cavity electromechanics allows the manipulation of mechanical oscillations similar to photon-cavity systems. Many advances on this subject have been achieved in various materials. In addition, the coherent phonon transfer (phonon Rabi oscillations) between the phonon cavity mode and another oscillation mode has attracted many interest in nanoscience. Here, we demonstrate coherent phonon transfer in a carbon nanotube phonon-cavity system with two mechanical modes exhibiting strong dynamical coupling. The gate-tunable phonon oscillation modes are manipulated and detected by extending the red-detuned pump idea of photonic cavity electromechanics. The first- and second-order coherent phonon transfers are observed with Rabi frequencies 591 and 125 kHz, respectively. The frequency quality factor product fQ ∼ 2 × 10 Hz achieved here is larger than kT/h, which may enable the future realization of Rabi oscillations in the quantum regime.
声子-腔电动力学允许类似光子腔系统的机械振荡的操控。在不同的材料中已经实现了这一主题的许多进展。此外，声子腔模式与另一种振荡模式之间的相干声子转移（声子拉比振荡）在纳米科学中引起了许多关注。在这里，我们展示了在具有两个表现出强动力学耦合的机械模式的碳纳米管声子腔系统中相干声子转移。通过扩展光子腔机电学中的红失谐泵浦思想来操纵和检测栅极可调谐的声子振荡模式。分别观察到一阶和二阶相干声子转移，其拉比频率分别为 591 kHz 和 125 kHz。这里实现的频率品质因数乘积 fQ∼2×10 Hz 大于 kT/h，这可能使未来在量子领域实现拉比振荡成为可能。
