[PAST EVENT] Physics Colloquium

Friday, April 12th 2013
4pm - 5pm
Small Hall, Room 111
300 Ukrop Way
Williamsburg, VA 23185
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Richard AverittRichard Averitt
Dr. Richard Averitt, Boston University, Title of Talk: "Terahertz Dynamics and Control in Complex Materials"
Full Description
Abstract:
The past decade has seen enormous advances in materials and spectroscopy spanning from classical to quantum physics. On the classical front, metamaterials are artificial composites with unique electromagnetic properties that derive from their sub-wavelength structure. Metamaterials enable new ways to control light with negative refractive index and cloaking as two examples of considerable interest. Moving to the quantum realm, correlated electron materials exhibit fascinating phenomena ranging from superconductivity to metal-insulator transitions. Many of these materials exhibit colossal changes to small perturbations, which includes electromagnetic excitation. This opens up exciting possibilities such as photoinduced phase transitions with a goal to create metastable states with unique properties. Following an introduction to this research field, I will show examples of our work using picosecond terahertz pulses to probe and control matter including our recent demonstration of a metamaterial enhanced electric field initiated insulator-to-metal transition in vanadium dioxide.
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