Ultrafast electronic dynamics of solid-state materials, particularly under light excitation, are of great interests both fundamentally and practically due to the wide applications of optoelectronic devices, such as transistors, photovoltaics, or photodetectors. With the ability to control electronic dynamics in solids on attosecond time scales, the development of lightwave electronics holds promise for realizing ultrafast signal processing devices at frequencies up to the petahertz regime, surpassing current technology by orders of magnitude. The development of light-driven petahertz electronics is inherently connected to solid state nanophysics. First, the natural length scale of electron motion on the few attosecond time scale is on the order of one nanometer. Second, for the development of petahertz integrated circuits, the devices have to be both on nanometer length scales and be based on non-resistive processes, such as ballistic electron transport. Nanomaterials or nanostructured solids thus play a crucial role in the development of future on-chip petahertz electronics devices. As the other side of the coin, field-resolved spectroscopy relying on similar optical tools, is a powerful technique for addressing the sub-cycle response of a solid to a light field. Opening up field-resolved spectroscopy to the THz and PHz frequency ranges will enable sensitivity to a manifold of vibrational and electronic transitions in organic electronics and 2D-materials. The talk will give a broader introduction into this field and summarize a few recent results from our group. A perspective will be given on the next steps towards the implementation of petahertz signal processing.
Bio: Matthias Kling is a Professor of Photon Science and (by courtesy) of Applied Physics at Stanford University and the Director of the Science, Research and Development (SRD) Division at the Linac Coherent Light Source (LCLS) at the SLAC National Accelerator Laboratory. Kling received a Diploma in Physics in 1998 and a PhD in Physical Chemistry in 2002 from Goettingen University in Germany. He subsequently was a postdoctoral researcher at the University of California at Berkeley and at AMOLF in Amsterdam, The Netherlands. From 2007 Kling led the Research Group on Attosecond Imaging at the Max Planck Institute of Quantum Optics (MPQ) in Garching, Germany, and was Assistant Professor at Kansas-State University from 2009 until 2013. In 2013, he became Professor of Physics at the Ludwig-Maximilians-Universität (LMU) in Munich in Germany and was appointed as Max Planck Fellow at MPQ in 2019. Kling joined Stanford University in 2021, leading the Research Group on Ultrafast Electronics and Nanophotonics and serving as the Director of the SRD Division at LCLS at SLAC.
This seminar is sponsored by the Department of Applied Physics and the Ginzton Laboratory.