Coherent Phonon Rabi Oscillations with a High-Frequency Carbon Nanotube Phonon Cavity

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• 作者：Dong Zhu ; Xin-He Wang ; Wei-Cheng Kong ; Guang-Wei Deng ; Jiang-Tao Wang ; Hai-Ou Li ; Gang Cao ; Ming Xiao ; Kai-Li Jiang ; Xing-Can Dai ; Guang-Can Guo ; Franco Nori ; Guo-Ping Guo
• 刊名：Nano Letters
• 出版年：2017
• 出版时间：February 8, 2017
• 年：2017
• 卷：17
• 期：2
• 页码：915-921
• 全文大小：508K
• ISSN：1530-6992

文摘

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_m ∼ 2 × 10¹² Hz achieved here is larger than k_BT_base/h, which may enable the future realization of Rabi oscillations in the quantum regime.