Femtosekunden-Laserverstärkersystem

• Subject Area: Condensed Matter Physics
• Term: Funded in 2013
• Project identifier: Deutsche Forschungsgemeinschaft (DFG) - Project number 233412044

Ultrafast phenomena related to and/or accessible only via the absolute temporal phase of electronic, vibrational and spin coherent excitations in condensed matter are studied via electromagnetic transients in the multi-terahertz regime. Central objectives are as follows:i. (Establishing rapid quantum oscillatory motion as the earliest regime in the dynamics and transport of electrons in solids. Fundamental phenomena like the temporal buildup of effective mass in semiconductors and Zitterbewegung in graphene are accessed directly.ii. Observation and control of charge and spin electronic properties of solids under extremely high transient electric or magnetic bias provided by a novel source of phase-locked multi-terahertz pulses allowing analysis with a resolution significantly below half a cycle of light.iii. Field-resolved photon-echo studies in the mid infrared. Unprecedented insights into complex phenomena like the interplay between low-energy degrees of freedom in high-temperature superconductors and intermolecular motion in liquids are envisioned.The following development in ultrabroadband terahertz technology will enable the experiments: Generation of phase-locked electromagnetic transients with precisely controlled shape of the electric field like quasi-monopolar terahertz shock waves or single-cycle pulses with field amplitudes up to 30 MV/cm.

• DFG Programme: Major Research Instrumentation
• Major Instrumentation: Femtosekunden-Laserverstärkersystem
• Instrumentation Group: 5700 Festkörper-Laser
• Applicant Institution: Universität Konstanz
• Leader: Professor Dr. Alfred Leitenstorfer