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Departmental Colloquium


Quantum Electro-Mechanics:
Integrating Single Electronics with Nano-Mechanics

Prof. Robert Knobel
Department of Physics and iQUEST
University of California, Santa Barbara

Time
 
Fri. October 4, 2002     12:30 PM     Stirling B

Abstract
 
Micro-fabricated semiconductor beams and cantilevers find use as force sensors such as in the atomic force microscope (AFM). As we reduce the size of the mechanical structure to the nanometer scale, these instruments will work at higher frequencies with improved resolution, but will require new read-out techniques. Electrons confined within nanometer-scale regions are interesting systems to study with such devices, since quantum effects become noticeable. However, it is also possible to exploit the sensitivity of nanometer-scale electronics to read-out mechanical motion. I will present work on developing new read-out techniques for nanometer-scale resonant beams based on single electron transistors at cryogenic temperatures and radio frequencies. This integration allows unprecedented sensitivity to mechanical motion, and may allow us to approach the quantum mechanical limits of position measurement.



Professor Robert Knoble is a candidate for the ATOP-funded Assistant Professor position in the Department.

Refreshments will be served in the lounge after the talk.

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