[22a-C501-1~8] 22.1 Joint Session M "Phonon Engineering"

11:30 AM - 11:45 AM JST(2:30 AM - 2:45 AM UTC)Presentation by Applicant for JSAP Young Scientists Presentation Award

[22a-C501-8] Phonon Propagation between Superconducting Devices on the Surface of SiO₂/Si Substrate

〇(M1)Tatsuya Iizuka¹, Yoshinao Mizugaki¹, Hiroshi Shimada¹ (1.UEC)

Keywords:

phonon,propagation paths,superconducting devices

In this study, we conducted experiments on the generation and detection of phonons using a superconducting quantum interference device (SQUID) and a single Cooper pair transistor (SCPT) fabricated on a SiO₂/Si substrate at about 70 millikelvin. The SQUID acted as a phonon generator, while the SCPT acted as a phonon detector. Two samples were prepared. One had an etched groove between the devices, the other did not have. In order to identify the propagation paths of phonons between the devices, comparative measurements of phonon arrival efficiency using these two samples were carried out. The measurement results indicate that phonons propagate through the SiO₂ layer between surface devices.