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Communication Dans Un Congrès Année : 2023

Coupled membrane nanomechanical resonators, for room temperature phonon-cavity electromechanics

Xin Zhou

Résumé

Phonon-cavity electromechanics studies the interactions between two mechanical modes by analogy with optomechanics [1]. It is interesting because it can transmit information carried by phonons between mechanical modes and to filter signals in different frequency bands by controlling the energy transfer [2]. However, most previous work has relied on mechanical coupling, which limits the resonant frequency and flexible tunability of the integration. Here, we will present our recent achievements in developing a novel nanoelectromechanical system, consisting of capacitive coupling of two distinct resonators: a silicon nitride drum resonator (with resonance frequency Ωm1) and an aluminum one (with resonance frequency Ωm2) [3-4]. The whole device structure can be viewed as a parallel plate capacitor, where each plate is a membrane drum. Integrated with a versatile platform composed of microwave reflectometry and a microwave cavity, both resonators can be manipulated and detected independently. With this unique device structure, we first investigated phonon-cavity electromechanics by taking the silicon nitride drum as a phonon cavity and performing double-tone operations, through an analogue of a microwave optomechanical system [4]. Here, it is quite different from conventional optomechanical systems in which the mechanical damping rate is usually much smaller than that of the coupled cavity. Electromechanically induced transparency and amplification of input signals have been demonstrated by sideband pumping the phonon-cavity. This unique coupled system gives access to the observation of the phonon-cavity force affecting the mechanical damping rate of both movable objects. Second, we explore a three-tone operation scheme by pumping the phonon-cavity at its blue and red sideband at the same time and using the third tone to probe either the cavity or the coupled Al drum, in analogy with the back-action evading scheme in optomechanics. We have observed phase sensitive parametric amplification in this double pump scheme, as shown in Fig.1. Besides, destructive interferences between the probe signal and these phonons generated by the double-pump tones have also been observed. These measurement results are in good agreement with our analytical calculations based on electrostatic coupling model. Our results open up new possibilities in the study of phonon-cavity based signal processing in the classical and potentially in the future in the quantum regimes. Besides, this kind of device will offer more degrees of freedom in routing propagation of photons and phonons in microwave optomechanical circuits. References [1] I. Mahboob, K. Nishiguchi, H. Okamoto & H. Yamaguchi, Nature Physics, 8 (2012) 387-392 [2] Faust, T., Rieger, J. Seitner, M. J. Krenn, P. Kotthaus, J.P. Weig, E. M., Physical review letters, 109 (2012), 037205 [3] Xin Zhou, Srisaran Venkatachalam, Ronghua Zhou, Hao Xu, Alok Pokharel, Andrew Fefferman, Mohammed Zaknoune, and Eddy Collin, Nano Lett. 21 (2021), 5738–5744 [4] Alok Pokharel, Hao Xu, Srisaran Venkatachalam, Eddy Collin, Xin Zhou, Nano Lett., 22 (2022), 7351-7357
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Dates et versions

hal-04234875 , version 1 (10-10-2023)

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  • HAL Id : hal-04234875 , version 1

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Xin Zhou. Coupled membrane nanomechanical resonators, for room temperature phonon-cavity electromechanics. conference on phonon scattering in condensed matter, Jul 2023, Paris, France. ⟨hal-04234875⟩
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