EPJ Web of Conferences
Volume 41, 2013XVIIIth International Conference on Ultrafast Phenomena
|Number of page(s)||3|
|Section||THz Science and Technology, Nano-Optics, Plasmonics and Meta Materials|
|Published online||13 March 2013|
Sub-cycle switching of a photonic bandstructure via ultrastrong light-matter coupling
1 Department of Physics, University of Konstanz, 78457 Konstanz, Germany
2 Department of Physics, University of Regensburg, 93040 Regensburg, Germany
3 NEST, Istituto Nanoscienze-CNR and Scuola Normale Superiore, 56127 Pisa, Italy
4 Laboratorio TASC, CNR-IOM, Area Science Park, 34149 Trieste, Italy
Phase-locked multi-terahertz transients map out the full photonic bandstructure of a one-dimensional photonic crystal while a 12-fs control pulse activates ultrastrong interaction on a sub-cycle time scale with quantized electronic transitions in semiconductor quantum wells. We trace the build-up dynamics of a large vacuum Rabi splitting and observe an unexpected asymmetric formation of the upper and lower polariton bands. The pronounced flattening of the photonic bands causes a slow-down of the group velocity by one order of magnitude on the time scale of the oscillation period of light.
© Owned by the authors, published by EDP Sciences, 2013
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 2.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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