Experiments
- AG - astrophysics and geophysics
- BK - biophysics and complex systems
- FM - solid state physics and physics of materials
- KT - nuclear physics and particle physics
FM - solid state physics and physics of materials
- FM.ATE - Analytical Transmission Electron Microscopy of Self-organizing Nanocomposites
- FM.DIF - Diffusion in the solid
- FM.ERH - Recovery and Recrystallization of Aluminum
- FM.FMR - Ferromagnetic Resonance
- FM.HEU - High-harmonic Generation with an Ultrashort-Pulse Laser
- FM.LEE - Low-energy Electron Diffraction (LEED)
- FM.MBE - Molecular Beam Epitaxy and Growth Control by Electron Diffraction (RHEED)
- FM.MEC - Mechanical Behavior of Nanostructured Metals
- FM.MKS - Magnetic Coupling in thin films and magneto-optical Kerr effect
- FM.ORG - Organic Electronics: Charge transport in organic semiconductors
- FM.PHA - Phase Transitions of Iron-Carbon-Alloys
- FM.PLD - Pulsed Laser Deposition and Thin Film Characterization by Spectroscopic Ellipsometry
- FM.QHE - Quantum Hall Effect
- FM.SOL - Solar Cell
- FM.TES - Tunnel Effect in Superconductors
- FM.TSA - Time-Resolved Transient Absorption Spectroscopy
- FM.ULP - Spatial and Temporal Distortion of Ultrashort Light Pulses
- KT.MOE - Mössbauer Spectroscopy
- KT.PIR - Elemental analysis by proton induced X-ray emission (PIXE)
- KT.POV - Positron Annihilation: Coincidence Spectroscopy
FM.TSA - Time-Resolved Transient Absorption Spectroscopy
Time-resolved spectroscopy is a powerful tool for studying how light interacts with the matter under investigation, as well as for studying the sample itself. Depending on the light sources used, the accessible processes range from very fast electronic dynamics (femtosecond timescales), vibrational effects (femto- to picoseconds), photochemical reactions (nano- to many microseconds), to structural changes (picoseconds to microseconds). One common way to study these processes is through pump-probe experiments. In these experiments, the system is first excited with a pump pulse, and then a second probe pulse is used to measure the system's response. By adjusting the delay between the pump and probe pulses, one can probe the system at different times after excitation. This allows to observe how the system changes over time. In this lab, the excitation of the molecule Zinc Tetraphenylporphyrin (ZnTPP) will be studied using laser pulses of two different energies to measure the transient absorption (TA) in different concentrations of the molecule. The TA of mixtures of ZnTPP and fullerene (C70) in varying ratios will be evaluated to study the influence of the presence of fullerene on the decay of the excited ZnTPP*. The effect of the laser pulse characteristics on the measured signal will also be investigated.