Sounds good: useful phonons

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• Professor Tony Kent, The university of Nottingham
• Wednesday 24 April 2019, 14:00-15:00
• Mott Seminar Room (531), Cavendish Laboratory, Department of Physics.

If you have a question about this talk, please contact Dr Kaveh Delfanazari.

When considering quantum electronic transport phenomena, phonons have got a bad name for themselves for causing scattering/dephasing, etc. However, we have shown that coherent phonons (bulk acoustic waves) with frequencies up to about one terahertz can be used for controlled high-speed manipulation of electronic transport, with potential applications in microwave electronics and detectors for acoustic nanoscopy. The bulk acoustic waves are generated by femtosecond pulsed laser excitation of thin film transducers and interact with the electronic states in semiconductor nanostructures via the deformation potential coupling. We have previously demonstrated bulk acoustic wave-driven transport effects in Schottky and resonant tunneling devices and 2D electron systems. In this presentation, I will review some of our past results, leading up to our recent demonstration of using bulk acoustic waves to modulate, at high-speed, the THz emission from a quantum cascade laser.

This talk is part of the Semiconductor Physics Group Seminars series.

This talk is included in these lists:

• All Cavendish Laboratory Seminars
• All Talks (aka the CURE list)
• Centre for Health Leadership and Enterprise
• Featured lists
• ME Seminar
• Mott Seminar Room (531), Cavendish Laboratory, Department of Physics
• Neurons, Fake News, DNA and your iPhone: The Mathematics of Information
• School of Physical Sciences
• Semiconductor Physics Group Seminars
• Thin Film Magnetic Talks

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