Surface acoustic wave unidirectional transducers for quantum applications
Artikel i vetenskaplig tidskrift, 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.

Författare

Maria Ekström

Chalmers, Mikroteknologi och nanovetenskap (MC2), Kvantkomponentfysik

Thomas Aref

Chalmers, Mikroteknologi och nanovetenskap (MC2), Kvantkomponentfysik

Johan Runeson

Chalmers, Mikroteknologi och nanovetenskap (MC2), Kvantkomponentfysik

Johan Björck

Chalmers, Mikroteknologi och nanovetenskap (MC2)

Isac Boström

Chalmers, Mikroteknologi och nanovetenskap (MC2)

Per Delsing

Chalmers, Mikroteknologi och nanovetenskap (MC2), Kvantkomponentfysik

Applied Physics Letters

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

Vol. 110 7 073105

Ämneskategorier

Medicinsk apparatteknik

Annan elektroteknik och elektronik

DOI

10.1063/1.4975803

Mer information

Senast uppdaterat

2018-07-20