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Heterodyne mixing of millimetre electromagnetic waves and sub-THz sound in a semiconductor device

Heywood, Sarah L.; Glavin, Boris A.; Beardsley, R.P.; Akimov, Andrey V.; Carr, Michael W.; Norman, James; Norton, Philip C.; Prime, Brian; Priestley, Nigel; Kent, Anthony J.

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Authors

Sarah L. Heywood

Boris A. Glavin

R.P. Beardsley

Andrey V. Akimov

Michael W. Carr

James Norman

Philip C. Norton

Brian Prime

Nigel Priestley

Anthony J. Kent



Abstract

We demonstrate heterodyne mixing of a 94 GHz millimetre wave photonic signal, supplied by a Gunn diode oscillator, with coherent acoustic waves of frequency ~ 100 GHz, generated by pulsed laser excitation of a semiconductor surface. The mixing takes place in a millimetre wave Schottky diode, and the intermediate frequency electrical signal is in the 1 – 12 GHz range. The mixing process preserves all the spectral content in the acoustic signal that falls within the intermediate frequency bandwidth. Therefore this technique may find application in high-frequency acoustic spectroscopy measurements, exploiting the nanometre wavelength of sub-THz sound. The result also points the way to exploiting acoustoelectric effects in photonic devices working at sub-THz and THz frequencies, which could provide functionalities at these frequencies, e.g. acoustic wave filtering, that are currently in widespread use at lower (GHz) frequencies.

Journal Article Type Article
Acceptance Date Jun 30, 2016
Online Publication Date Aug 1, 2016
Deposit Date Jul 27, 2016
Publicly Available Date Aug 1, 2016
Journal Scientific Reports
Electronic ISSN 2045-2322
Publisher Nature Publishing Group
Peer Reviewed Peer Reviewed
Volume 6
Article Number 30396
DOI https://doi.org/10.1038/srep30396
Public URL https://nottingham-repository.worktribe.com/output/797578
Publisher URL http://www.nature.com/articles/srep30396

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