360 citations · 1.2k across the 41 of their papers we have counts for
24 papers · 1 filter
Quadrature skyrmions in two-dimensionally arrayed parametric resonators
Hiroshi Yamaguchi, Daiki Hatanaka, Motoki Asano
Skyrmions are topological solitons in two-dimensional systems and have been observed in various physical systems. Generating and controlling skyrmions in artificial resonator array…
Phononic-crystal cavity magnomechanics
Daiki Hatanaka, Motoki Asano, Hajime Okamoto +1
Establishing a way to control magnetic dynamics and elementary excitations (magnons) is crucial to fundamental physics and the search for novel phenomena and functions in magnetic…
Buckling-induced quadratic nonlinearity in silicon phonon waveguide structures
Megumi Kurosu, Daiki Hatanaka, Hajime Okamoto +1
We fabricated and characterized a single-crystal silicon phonon waveguide structure with lead zirconate titanate (PZT) piezoelectric transducers. The compressive stress in a silico…
Mode-sensitive magnetoelastic coupling in phononic-crystal magnomechanics
D. Hatanaka, H. Yamaguchi
Acoustically driven spin-wave resonance in a phononic crystal cavity is numerically investigated. The designed cavity enables confinement of gigahertz vibrations in a wavelength-sc…
The Librator: A new dynamical regime for nonlinear microelectromechanical devices
Samer Houri, Motoki Asano, Hajime Okamoto +1
We present a novel mode of operation for Duffing-type nonlinear microelectromechanical (MEMS) devices whereby a self-sustained multi-frequency output is generated. This new librato…
Cavity magnomechanics with surface acoustic waves
D. Hatanaka, M. Asano, H. Okamoto +3
Magnons, namely spin waves, are collective spin excitations in ferromagnets, and their control through coupling with other excitations is a key technology for future hybrid spintro…
Non-equilibrium quadratic measurement-feedback squeezing in a micromechanical resonator
Motoki Asano, Takuma Aihara, Tai Tsuchizawa +1
Measurement and feedback control of stochastic dynamics has been actively studied for not only stabilizing the system but also for generating additional entropy flows originating i…
Near-field cavity optomechanical coupling in a compound semiconductor nanowire
Motoki Asano, Guoqiang Zhang, Takehiko Tawara +2
A III-V compound semiconductor nanowire is an attractive material for a novel hybrid quantum interface that interconnects photons, electrons, and phonons through a wavelength-tunab…
Multimode internal resonances in a MEMS self-sustained oscillator
S. Houri, D. Hatanaka, M. Asano +1
We investigate the dynamics of a microelectromechanical (MEMS) self-sustained oscillator supporting multiple resonating and interacting modes. In particular, the interaction of the…
Optically probing Schwinger angular momenta in a micromechanical resonator
Motoki Asano, Ryuichi Ohta, Takuma Aihara +3
We report an observation of phononic Schwinger angular momenta, which fully represent twomode states in a micromechanical resonator. This observation is based on simultaneous optic…
Acoustic Kerr nonlinearity of wave propagation in a planar nanoelectromechanical waveguide
Megumi Kurosu, Daiki Hatanaka, Hiroshi Yamaguchi
Nonlinearity is the key to introducing novel concepts in various technologies utilizing traveling waves. In contrast to the field of optics, where highly functional devices have be…
Modal Analysis Investigation of Mechanical Kerr Frequency Combs
Samer Houri, Daiki Hatanaka, Yaroslav M. Blanter +1
The aim of this work is to theoretically investigate the possibility of Kerr frequency combs in mechanical systems. In particular, whether microelectrome-chanical devices (MEMS) ca…
Pulse-width modulated oscillations in a nonlinear resonator under two-tone driving as a means for MEMS sensor readout
Samer Houri, Ryuichi Ohta, Motoki Asano +2
A MEMS Duffing resonator is driven by two adjacent frequency tones into the nonlinear regime. We show that if the two-tone drive is applied at a frequency where a bistable response…
Electrostatically induced phononic crystal
Daiki Hatanaka, Adrian Bachtold, Hiroshi Yamaguchi
The possibility of realizing an electrostatically induced phononic crystal is investigated numerically in an acoustic waveguide based on a graphene sheet that is suspended over per…
An opto-electro-mechanical system based on evanescently-coupled optical microbottle and electromechanical resonator
Motoki Asano, Ryuichi Ohta, Takashi Yamamoto +2
Evanescent coupling between a silica optical microbottle resonator and a GaAs electromechanical resonator is demonstrated. This coupling provides high optical sensitivity and effic…
Coherent coupling of dark and bright excitons with vibrational strain
Ryuichi Ohta, Hajime Okamoto, Takehiko Tawara +2
In many physical systems, there are specific electronic states called dark state that are protected from the rapid radiative decay imposed by the system symmetry. Although their lo…
Broadband reconfigurable logic gates in phonon waveguides
Daiki Hatanaka, Tom Darras, Imran Mahboob +2
The high-quality-factor mechanical resonator in electromechanical systems has facilitated dynamic control of phonons via parametric nonlinear processes and paved the development of…
A strongly-coupled -type micromechanical system
Hajime Okamoto, Ryan Schilling, Hendrik Schütz +4
We study a classical -type three-level system based on three high- micromechanical beam resonators embedded in a gradient electric field. By modulating the strength of the fi…
Electron paramagnetic resonance spectroscopy using a dc-SQUID magnetometer directly coupled to an electron spin ensemble
Hiraku Toida, Yuichiro Matsuzaki, Kosuke Kakuyanagi +5
We demonstrate electron spin polarization detection and electron paramagnetic resonance (EPR) spectroscopy using a direct current superconducting quantum interference device (dc-SQ…
An electromechanical Ising machine
I. Mahboob, H. Yamaguchi
Solving intractable mathematical problems in simulators composed of atoms, ions, photons or electrons has recently emerged as a subject of intense interest. Here we extend this con…
Phonon propagation dynamics in band-engineered one-dimensional phononic crystal waveguides
Daiki Hatanaka, Amaury Dodel, Imran Mahboob +2
The phonon propagation dynamics in a phononic crystal waveguide, realized via a suspended one-dimensional membrane array with periodic air holes, is investigated as function of its…
Coherent phonon manipulation in coupled mechanical resonators
Hajime Okamoto, Adrien Gourgout, Chia-Yuan Chang +4
Coupled mechanical oscillations were first observed in paired pendulum clocks in the mid-seventeenth century and were extensively studied for their novel sympathetic oscillation dy…
Discrete-time quadrature feedback cooling of a radio-frequency mechanical resonator
M. Poot, S. Etaki, H. Yamaguchi +1
We have employed a feedback cooling scheme, which combines high-frequency mixing with digital signal processing. The frequency and damping rate of a 2 MHz micromechanical resonator…
Cooling of a Micro-mechanical Resonator by the Back-action of Lorentz Force
Y. D. Wang, K. Semba, H. Yamaguchi
Using a semi-classical approach, we describe an on-chip cooling protocol for a micro-mechanical resonator by employing a superconducting flux qubit. A Lorentz force, generated by t…