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Real-space characterization of cavity-coupled waveguide systems in hypersonic phononic crystals
Physical Review Applied ( IF 4.532 ) Pub Date : 
D. Hatanaka and H. Yamaguchi

A phononic crystal formed in a suspended membrane provides full confinement of hypersonic waves and thus realizes a range of chip-scale manipulations. In this letter, we demonstrate the mode-resolved real-space characterization of the mechanical vibration properties in cavities and waveguide systems. Multiple resonant modes are independently characterized in various designed cavities, and wavelength-scale high-Q resonances up to Q= 4200 under atmospheric conditions are confirmed. This also reveals that the waveguide allows us to observe a mode-resolved wave transmission and thereby drive evanescently-coupled cavities. The methods offer a significant tool with which to build compact and low-power microwave phononic circuitry for signal processing and hybrid quantum system applications.
更新日期:2020-01-09

 

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