4 papers
Terahertz displacive excitation of a coherent Raman-active phonon in VO
Flavio Giorgianni, Mattia Udina, Tommaso Cea +7
Nonlinear processes involving frequency-mixing of light fields set the basis for ultrafast coherent spectroscopy of collective modes in solids. In certain semimetals and semiconduc…
Third harmonic generation from collective modes in disordered superconductors
G. Seibold, M. Udina, C. Castellani +1
Recent experiments with strong THz fields in both conventional and unconventional superconductors have clearly evidenced a marked third-harmonic generation below the superconductin…
Raman response in the nematic phase of FeSe
Mattia Udina, Marco Grilli, Lara Benfatto +1
Raman experiments on bulk FeSe revealed that the low-frequency part of Raman response , which probes nematic fluctuations, rapidly decreases below the nematic…
Theory of coherent oscillations detection in THz pump-probe spectroscopy: from phonons to electronic collective modes
Mattia Udina, Tommaso Cea, Lara Benfatto
Time-resolved spectroscopies using intense THz pulses appear as a promising tool to address collective electronic excitations in condensed matter. In particular recent experiments…