Hrvoje Petek

 

Co-Director, Petersen Institute of NanoScience and Engineering

Professor, Department of Physics and Astronomy

G-01 Allen Hall

412-624-3599, 9163(fax)

petek@pitt.edu

http://www.phyast.pitt.edu/people/fprofile.php?id=174

 

Hrvoje Petek’s research focuses on the study of ultrafast phenomena in solid-state materials and at solid surfaces.  His current projects concern the electronic excitation, relaxation, and reactions of atoms and molecules on metal and semiconductor surfaces, the electron-phonon coupling in nonequilibrium electron-hole plasmas in solids, and ultrafast electron microscopy of plasmonic nanostructures.  By combining ultrafast laser nonlinear two-photon photoemission with photoelectron emission microscope (PEEM), Petek and his group have developed a method for investigating the coherent electromagnetic fields and excited electron distributions with 60 nm spatial and <10 fs temporal resolution.  The time-resolved (TR)-PEEM is currently employed to study the time evolution of propagating and localized surface plasmon fields in metal films and metallic nanostructures.   The time-evolution of plasmonic fields is recorded with phase-related external excitation fields at a rate of 330 attoseconds/frame (1/4 of the optical cycle). 

 

 

 

 

 

 

 

Time-evolution of plasmonic fields (left) and time-resolved photoelectron emission microscope (TR-PEEM) (right).