Advanced Spectroscopy

Phonons are the fingerprint of structure and defects may be associated to structural perturbations. Electronic excitations in most polar semiconductors are strongly coupled to the lattice vibrations, thus, for a comprehensive understanding of the structural-electronic interactions, nature of electron-phonon coupling in perovskites will be characterized.

A large set of top notch optical, vibrational and electronic spectroscopic techniques will be conveyed to reach real time mapping of molecular interactions and structural deformations:

• Ultrafast coherent lattice fluctuation spectroscopy.
• Picoseconds acoustics
• Electronic structure and Carrier Dynamics by time-resolved pump-push photo-electron (tr-PPE) spectroscopy.
• Time-resolved photo-electron spectroscopy and microscopy. Spatially resolved pump&push photo-electron spectroscopy is performed by a commercial and modular Photoemission Electron Microscope (PEEM) coupled to an electron analyser and an optical or electrical “pump” system.