Title :
Direct observation of ultrafast dynamics of electron thermalization in gold using surface SHG
Author :
Taylor, A.J. ; Chunlei Guo ; Rodriguez, G.
Author_Institution :
Div. of Mater. Sci. & Technol., Los Alamos Nat. Lab., NM, USA
Abstract :
Summary form only given. We describe a pump-probe optical measurement that reveals the details of hot electron thermalization dynamics by monitoring the time evolution of both the fundamental (1.55 eV) and second harmonic generation (SHG, 3.1 eV) signals from a gold (Au) surface. The 110-fs laser pulse from an amplified Ti:sapphire laser system is split into an intense pump beam and a weak probe beam with crossed polarization (p-polarization for probe). Both fundamental and surface SHG signals are generated by the probe beam and monitored simultaneously.
Keywords :
electron relaxation time; gold; hot carriers; light polarisation; optical harmonic generation; optical pumping; surface phenomena; Al/sub 2/O/sub 3/:Ti; Au; Au surface; amplified Ti:sapphire laser system; crossed polarization; direct observation; electron thermalization; fundamental signals; hot electron thermalization dynamics; intense pump beam; laser pulse; p-polarization; probe beam; pump-probe optical measurement; second harmonic generation; surface SHG; time evolution; ultrafast dynamics; weak probe beam; Electron optics; Gold; Laser beams; Laser excitation; Monitoring; Nonlinear optics; Optical harmonic generation; Probes; Pump lasers; Stimulated emission;
Conference_Titel :
Quantum Electronics and Laser Science Conference, 2001. QELS '01. Technical Digest. Summaries of Papers Presented at the
Conference_Location :
Baltimore, MD, USA
Print_ISBN :
1-55752-663-X
DOI :
10.1109/QELS.2001.962083
