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Dr Bernd Kaestner, PTB Braunschweig
Monday 10 October 2011, 14:15-16:00
Quantized current and voltage sources based on non-adiabatic charge pumping
- 👤 Speaker: Dr Bernd Kaestner, PTB Braunschweig
- 📅 Date & Time: Monday 10 October 2011, 14:15 - 16:00
- 📍 Venue: Mott Seminar Room, Cavendish Laboratory, Department of Physics
Abstract
Charge pumping is a transport mechanism of generating electric current in the absence of a bias voltage. In the non-adiabatic regime the system is driven out of equilibrium and the ability to control the number of pumped electrons per modulation cycle has long been considered unfeasible. Non-adiabatic pumping with high precision has recently been realized in tunable barrier devices, following the advances in surface-acoustic-wave-driven transport. The (re-)discovery of this mechanism provided new momentum to the developments of quantized current sources in the field of metrology. This talk discusses the pumping mechanism, its potential precision and its wider applications, including quantized voltage generation and excited state preparation.
Series This talk is part of the Semiconductor Physics Group Seminars series.
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