Probing and Controlling Low Energy Excitations in Complex Materials with Using Terahertz Pulses

Invited

Abstract

Single–cycle terahertz (THz) pulses enable both the understanding and control of low-energy excitations in materials on ultrafast timescales. Combining excitation with THz pulses with a time-delayed probe based on second harmonic generation enables the observation of ultrafast structural changes with surface sensitivity. Using this technique, we investigate the dynamics of surface and bulk carriers, as well as nonlinear phonon dynamics, in the topological insulator Bi2Se3. We will also describe the use of THz pulses as a probe to reveal spin dynamics in insulating antiferromagnets.

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Presenters

  • Antoinette Taylor

    Los Alamos National Laboratory, Center for Integrated Nanotechnologies, Los Alamos National Laboratory

Authors

  • Pamela Bowlan

    Los Alamos National Laboratories, Los Alamos National Laboratory, Center for Integrated Nanotechnologies, Los Alamos National Laboratory

  • Stuart Trugman

    Los Alamos National Laboratory, Center for Integrated Nanotechnologies, Los Alamos National Laboratory

  • john bowlan

    Los Alamos National Laboratory

  • Jian-Xin Zhu

    Center for Integrated Nanotechnologies, Los Alamos National Laboratory, Los Alamos National Laboratory, Los Alamos National Laboratory, Theoretical Division, Theoretical Division, Los Alamos National Laboratory, Los Alamos Natl Lab

  • Dzmitry Yarotski

    Los Alamos National Laboratory, Center for Integrated Nanotechnologies, Los Alamos National Laboratory

  • Rohit Prasankumar

    Los Alamos National Laboratory, Center for Integrated Nanotechnologies, Los Alamos National Laboratory

  • Antoinette Taylor

    Los Alamos National Laboratory, Center for Integrated Nanotechnologies, Los Alamos National Laboratory