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 and Kent, Anthony J. (2016) Heterodyne mixing of millimetre electromagnetic waves and sub-THz sound in a semiconductor device. Scientific Reports, 6 . 30396/1-30396/7. ISSN 2045-2322

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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.

Item Type: Article
RIS ID: https://nottingham-repository.worktribe.com/output/797578
Schools/Departments: University of Nottingham, UK > Faculty of Science > School of Physics and Astronomy
Identification Number: https://doi.org/10.1038/srep30396
Depositing User: Eprints, Support
Date Deposited: 27 Jul 2016 12:47
Last Modified: 04 May 2020 17:58
URI: https://eprints.nottingham.ac.uk/id/eprint/34617

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