Building on a 1 kHz amplified Ti:sapphire laser source, we developed a novel pump-probe setup for broadband picosecond acoustics using a white-light continuum probe coupled to an optical multichannel analyzer. The system allows one to access, in a single measurement, acoustic parameters such as sound velocity and attenuation all over the bandwidth of the acoustic wave-packet launched by the pump pulse. We use the setup to measure the sound attenuation in fused silica and observe a dynamic crossover occurring at ≈170 GHz. © 2011 American Institute of Physics.
Visualizing coherent phonon propagation in the 100 GHz range: A broadband picosecond acoustics approach / Pontecorvo, Emanuele; Ortolani, Michele; Dario, Polli; Marco, Ferretti; Ruocco, Giancarlo; Giulio, Cerullo; Scopigno, Tullio. - In: APPLIED PHYSICS LETTERS. - ISSN 0003-6951. - 98:1(2011), p. 011901. [10.1063/1.3532961]
Visualizing coherent phonon propagation in the 100 GHz range: A broadband picosecond acoustics approach
PONTECORVO, Emanuele;ORTOLANI, MICHELE;RUOCCO, Giancarlo;SCOPIGNO, TULLIO
2011
Abstract
Building on a 1 kHz amplified Ti:sapphire laser source, we developed a novel pump-probe setup for broadband picosecond acoustics using a white-light continuum probe coupled to an optical multichannel analyzer. The system allows one to access, in a single measurement, acoustic parameters such as sound velocity and attenuation all over the bandwidth of the acoustic wave-packet launched by the pump pulse. We use the setup to measure the sound attenuation in fused silica and observe a dynamic crossover occurring at ≈170 GHz. © 2011 American Institute of Physics.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
