Surface acoustic wave unidirectional transducers for quantum applications
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 (UDT...
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| Veröffentlicht in: | Applied physics letters 2017-02, Vol.110 (7) |
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| container_title | Applied physics letters |
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| creator | Ekström, Maria K. Aref, Thomas Runeson, Johan Björck, Johan Boström, Isac Delsing, Per |
| description | 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. |
| doi_str_mv | 10.1063/1.4975803 |
| format | Article |
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| ispartof | Applied physics letters, 2017-02, Vol.110 (7) |
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| source | AIP Journals Complete; Alma/SFX Local Collection; SWEPUB Freely available online |
| subjects | Applied physics Delay Delay lines Directivity Insertion loss Surface acoustic waves Transducers |
| title | Surface acoustic wave unidirectional transducers for quantum applications |
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