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Surface acoustic wave unidirectional transducers for quantum applications

Maria Ekström (Institutionen för mikroteknologi och nanovetenskap) ; Thomas Aref (Institutionen för mikroteknologi och nanovetenskap) ; Johan Runeson (Institutionen för mikroteknologi och nanovetenskap) ; Johan Björck ; Isac Boström ; Per Delsing (Institutionen för mikroteknologi och nanovetenskap)
Applied Physics Letters (00036951). Vol. 110 (2017), 7, p. -.
[Artikel, refereegranskad vetenskaplig]

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. © 2017 Author(s).

Denna post skapades 2017-03-03.
CPL Pubid: 248394


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