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Title: Unidirectional distributed acoustic reflection transducers for quantum applications

Journal Article · · Applied Physics Letters
DOI:https://doi.org/10.1063/1.5099095· OSTI ID:1530395
ORCiD logo [1]; ORCiD logo [2];  [3];  [4];  [5]; ORCiD logo [5]; ORCiD logo [5];  [5]; ORCiD logo [4];  [5];  [1]
  1. Univ. of Chicago, IL (United States). Inst. for Molecular Engineering; Argonne National Lab. (ANL), Argonne, IL (United States). Inst. for Molecular Engineering and Materials Science Division
  2. Univ. of Chicago, IL (United States). Inst. for Molecular Engineering; Univ. of California, Santa Barbara, CA (United States). Dept. of Physics; Google, Santa Barbara, CA (United States)
  3. Univ. of Chicago, IL (United States). Inst. for Molecular Engineering; Univ. of California, Santa Barbara, CA (United States). Dept. of Physics
  4. Univ. of Chicago, IL (United States). Inst. for Molecular Engineering, and Dept. of Physics
  5. Univ. of Chicago, IL (United States). Inst. for Molecular Engineering

Recent significant advances in coupling superconducting qubits to acoustic wave resonators have led to demonstrations of quantum control of surface and bulk acoustic resonant modes as well as Wigner tomography of quantum states in these modes. These advances were achieved through the efficient coupling afforded by piezoelectric materials combined with GHz-frequency acoustic Fabry-Perot cavities. Quantum control of itinerant surface acoustic waves appears in reach but is challenging due to the limitations of conventional transducers in the appropriate gigahertz-frequency band. In particular, gigahertz-frequency unidirectional transducers would provide an important addition to the desired quantum toolbox, promising unit efficiency with directional control over the surface acoustic wave emission pattern. Here, we report the design, fabrication, and experimental characterization of unidirectional distributed acoustic reflection transducers demonstrating a high transduction frequency of 4.8GHz with a peak directivity larger than 25dB and a directivity greater than 15dB over a bandwidth of 17MHz. A numerical model reproduces the main features of the transducer response quite well, with ten adjustable parameters (most of which are constrained by geometric and physical considerations). Finally, this represents a significant step toward quantum control of itinerant quantum acoustic waves.

Research Organization:
Argonne National Laboratory (ANL), Argonne, IL (United States)
Sponsoring Organization:
USDOE Laboratory Directed Research and Development (LDRD) Program; US Air Force Office of Scientific Research (AFOSR); US Army Research Laboratory (USARL); National Science Foundation (NSF)
Grant/Contract Number:
AC02-06CH11357; FWP 50503; LDRD 2017-092-N0
OSTI ID:
1530395
Alternate ID(s):
OSTI ID: 1525510
Journal Information:
Applied Physics Letters, Vol. 114, Issue 22; ISSN 0003-6951
Publisher:
American Institute of Physics (AIP)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 7 works
Citation information provided by
Web of Science

References (9)

Cavity Quantum Acoustic Device in the Multimode Strong Coupling Regime journal May 2018
Propagating phonons coupled to an artificial atom journal September 2014
Circuit quantum acoustodynamics with surface acoustic waves journal October 2017
Quantum control of surface acoustic-wave phonons journal November 2018
Two-finger (TF) SPUDT cells [Correspondence] journal March 2011
Reflective array modeling for reflective and directional SAW transducers journal January 1998
Two-finger (TF) spudt cells conference November 2008
Circuit quantum acoustodynamics with surface acoustic waves text January 2017
Cavity quantum acoustic device in the multimode strong coupling regime text January 2017

Cited By (3)

Sound-driven single-electron transfer in a circuit of coupled quantum rails journal October 2019
Sound-driven single-electron transfer in a circuit of coupled quantum rails text January 2019
Sound-driven single-electron transfer in a circuit of coupled quantum rails text January 2019

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