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Interferometric Time-Resolved Probing of Acoustic Modes in Single Gold Nanospheres

Meindert A. van Dijk·Markus Lippitz·Michel Orrit
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Abstract

We measure the transient absorption of single gold particles with a common-path interferometer. The prompt electronic part of the signal provides high-contrast images for diameters as small as 10 nm. Mechanical vibrations of single particles appear on a longer timescale (period of 16 ps for 50 nm diameter). They reveal the full heterogeneity of the ensemble, and the intrinsic damping of the vibration. We also observe a lower-frequency mode involving shear. Ultra-fast pump-probe spectroscopy of individual particles opens new insight into mechanical properties of nanometer-sized objects.

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Meindert A. van Dijk, Markus Lippitz, Michel Orrit. 2005-06-16. Interferometric Time-Resolved Probing of Acoustic Modes in Single Gold Nanospheres. https://arxiv.org/abs/cond-mat/0506401

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