We investigate the possibility to access specific heat of nanosized metal samples via near-infrared pump-probe measurements over a temporal range spanning from 100 fs to several nanoseconds. In order to improve the signal-to-noise ratio we propose to use a diffraction technique exploiting a two dimensional lattice of metallic nanodisks deposited on a silicon substrate. The proposed technique requires decoupling the thermal dynamic from the mechanical one, that is from the surface acoustic wave dynamics. The range of applicability and preliminary results are shown.
Proposal for an all-optical nano-calorimetric technique / F. Banfi, D. Nardi, F. Pressacco, C. Giannetti, B. Revaz, G. Ferrini, F. Parmigiani. ((Intervento presentato al convegno Son et Lumière : from microphotonics to nanophononics tenutosi a Cargèse nel 2008.
Proposal for an all-optical nano-calorimetric technique
D. NardiSecondo
;C. Giannetti;
2008
Abstract
We investigate the possibility to access specific heat of nanosized metal samples via near-infrared pump-probe measurements over a temporal range spanning from 100 fs to several nanoseconds. In order to improve the signal-to-noise ratio we propose to use a diffraction technique exploiting a two dimensional lattice of metallic nanodisks deposited on a silicon substrate. The proposed technique requires decoupling the thermal dynamic from the mechanical one, that is from the surface acoustic wave dynamics. The range of applicability and preliminary results are shown.
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