Surface acoustic wave unidirectional transducers for quantum applications
Journal article, 2017

The conversion efficiency of electric microwave signals into surface acoustic waves in different types of superconducting transducers is studied with the aim of quantum applications. We compare delay lines containing either conventional symmetric transducers (IDTs) or unidirectional transducers (UDTs) at 2.3 GHz and 10 mK. The UDT delay lines improve the insertion loss with 4.7 dB and a directivity of 22 dB is found for each UDT, indicating that 99.4% of the acoustic power goes in the desired direction. The power lost in the undesired direction accounts for more than 90% of the total loss in IDT delay lines, but only ?3% of the total loss in the floating electrode unidirectional transducer delay lines.

Author

Maria Ekström

Chalmers, Microtechnology and Nanoscience (MC2), Quantum Device Physics

Thomas Aref

Chalmers, Microtechnology and Nanoscience (MC2), Quantum Device Physics

Johan Runeson

Chalmers, Microtechnology and Nanoscience (MC2), Quantum Device Physics

Johan Björck

Chalmers, Microtechnology and Nanoscience (MC2)

Isac Boström

Chalmers, Microtechnology and Nanoscience (MC2)

Per Delsing

Chalmers, Microtechnology and Nanoscience (MC2), Quantum Device Physics

Applied Physics Letters

0003-6951 (ISSN) 1077-3118 (eISSN)

Vol. 110 7 073105

Subject Categories

Medical Equipment Engineering

Other Electrical Engineering, Electronic Engineering, Information Engineering

DOI

10.1063/1.4975803

More information

Latest update

7/20/2018