Coherent phonon Rabi oscillations with a high frequency carbon nanotube phonon cavity

Abstract

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 nano-science. 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 kHz and 125 kHz, respectively. The frequency quality factor product fQ_m~2=10^12 Hz achieved here is larger thank k_B T_base/h, which may enable the future realization of Rabi oscillations in the quantum regime.

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• Mesoscopic physics of nanomechanical systems
• Strong indirect coupling between graphene-based mechanical resonators via a phonon cavity
• Coherent phonon dynamics in spatially separated graphene mechanical resonators
• Ultrawide Band Gap β-Ga2O3 Nanomechanical Resonators with Spatially Visualized Multimode Motion
• Tunable strong coupling of mechanical resonance between spatially separated FePS${}_3$ nanodrums
• Realization of programmable nanomechanical lattice with both nearest-neighboring and next-nearest-neighboring couplings
• Single-photon pump by Cooper-pair splitting
• Geometric energy transfer in a Stückelberg interferometer of two parametrically coupled mechanical modes
• Strong Phonon-Cavity Coupling and Parametric Interaction in a Single Microcantilever under Ambient Conditions
• Fundamental and second-subharmonic Autler-Townes splitting in classical systems