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 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.

Strong indirect coupling between graphene-based mechanical resonators via a phonon cavity

“…To transfer information between different mechanical modes, tunable interactions between these modes are required 10 . While different modes in a single mechanical resonator can be coupled by parametric pump 3 , 4 , 11 – 16 and neighboring mechanical resonators can be coupled via phonon processes through the substrate 2 or direct contact interaction 17 , it is challenging to directly couple distant mechanical resonators.…”

Electrically tunable single- and few-layer MoS 2 nanoelectromechanical systems with broad dynamic range

“…In addition, our demonstration of broad DRs in 2D NEMS platforms opens up new possibilities for engineering large DRs in nanoscale devices that conventionally only have compromised DRs because of their highly miniaturized dimensions ( 16 ). Furthermore, extremely large nonlinear DRs (~40 to 50 dB) up to device fracture offer rich nanomechanical dynamics in 2D resonators and may facilitate exploring many exotic physical effects [for example, chaos ( 64 ), mode coupling ( 65 – 67 ), and internal resonance ( 39 )] that stemmed from strong nonlinear interactions in such uniquely wide nonlinear regimes built in these 2D resonant systems.…”

Single-photon pump by Cooper-pair splitting

“…Moreover, this opens a route for studying heat flows and energy exchange between harmonic cavities mediated by coherent interactions. The technique can in principle be extended to achieve phonon control and manipulation [89,90], e.g., by implementing timedependent protocols for the dots' gate voltages to tune dynamically the strength of the nonlocal features. Experiments involving Cooper-pair splitters [7][8][9][10][11][12][13][14][15][16][17] or mesoscopic cQED devices with microwave cavities [37,40,43,48,51,[67][68][69] and mechanical resonators [70][71][72][73] are of appealing and growing interest, and therefore promising candidates for the implementation of the system described here.…”