Source: thznetwork.net

July 30-31, 2012, Argonne National Laboratory, Chicago, USA

Most time resolved studies to date have made use of readily available visible and near-visible pump sources to trigger the events and, thus, were bound to study of only a small subset of phenomenon accessible to photon with an eV energies. In contrast, a few recent experiments have emerged in which the dynamics stimulated by THz and mid-infrared pulses led to a selective control of an insulator metal transition, discovery of the light induced superconductivity in a stripe-ordered cuprate and observation of coherent nonlinear phononics that can be used for ultrafast control of materials. Many low frequency excitations of complex condensed matter driven by THz pulses are likely to exhibit interesting dynamics that can also be used in a new generation of electronics. Furthermore, one may wish to study the response of the system in a controlled fashion using a variety of pump pulses.

It is therefore necessary to have light sources over broad range of frequencies. Particularly important is obtaining pump pulses in the frequency range from 1 to 20 THz that are 1) narrow band and tunable with the relative bandwidth of the order of 1% and the peak electric field of the order 100 kV/cm; 2) broad band and near-half-cycle with the peak electric field larger than 1MV/cm.

We propose a workshop to discuss various ideas that could help to build tunable THz sources satisfying above stated requirements. It is presumed that these sources should work in tandem with a free-electron laser or a storage ring based synchrotron light source producing x-ray probe pulse. Thus, synchronization between THz pulse and the x-ray pulse with a picosecond level accuracy is essential. It is also desirable to match the repetition rate of THz pulse with a repetition rate of x-ray pulses that in the case of a storage ring base light source is of the order of few MHz.

CONFIRMED INVITED SPEAKERS

Jianming Dai (Institute of Optics, University of Rochester, USA)
Terahertz Wave Air Photonics: Generation and detection of intense THz waves with laser-induced plasma in gaseous media

Michael Gensch (Helmholtz-Zentrum Dresden-Rossendorf, Germany)
Coherent THz pulses from linear SRF accelerators: Perspectives for naturally synchronized THz pump probe experiments and novel electron beam diagnostic

Hiroyuki Hama (Electron Light Science Centre, Tohoku University, Japan)
Development of THz Sources Based on Femtosecond Electron Pulse Train

Rupert Huber(Department of Physics, University of Regensberg, Germany)
Intense multi-terahertz pulses: electric and magnetic nonlinearities on the sub-cycle scale

Stefan Kaiser (Center for Free-Electron Laser Science, Germany)
Control of superconductivity in cuprate high-temperature superconductors using intense THz light pulses

Aaron Lindenberg (Department of Materials Science and Engineering, Stanford University, PULSE Institute, SLAC National Laboratory, USA)
High-field terahertz science using linac-based sources

Keith Nelson (Department of Chemistry, Massachusetts Institute of Technology, USA)
High power source for nonlinear terahertz spectroscopy

Gwyn Williams (Jefferson Lab, USA):
The Jefferson Lab High Power Broadband THz Facility

Dao Xiang (SLAC National Laboratory, USA):
Narrow-band THz emission from laser-modulated beam

For more information:
See the Terahertz Sources Workshop Website.