If you excite quasi‐particles in a superconductor, you can generate and detect phonons. Aly Dayem and Wolfgang Eisenmenger, who reported their work in the 23 Jan. issue of Phys. Rev. Letters, have built such a quantum generator and detector of phonons at 300 GHz. The same technique can be used over a large frequency range where conventional generators and detectors become prohibitively difficult. Until now phonons have been generated only piezoelectrically and at much lower frequencies.
This content is only available via PDF.
© 1967 American Institute of Physics.
1967
American Institute of Physics
You do not currently have access to this content.
