Abstract
Ultrafast time resolved transmission electron diffraction (TED) in a reflection geometry was used to study the cooling behavior of self-organized, well defined nanoscale germanium hut and dome clusters on Si(001). The clusters were heated in a pump-probe scheme by fs-laser pulses. The resulting transient temperature rise was then determined from the drop in diffraction intensity caused by the Debye-Waller effect. From a cooling time of τ=177 ps we estimated a strongly reduced heat transfer compared with homogeneous films of equivalent thickness.
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Frigge, T., Kalus, A., Klasing, F. et al. Nanoscale Heat Transport in Self-Organized Ge Clusters on Si(001). MRS Online Proceedings Library 1456, 45–50 (2012). https://doi.org/10.1557/opl.2013.148
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DOI: https://doi.org/10.1557/opl.2013.148