Ultrafast infrared nano-thermometry: imaging thermal transport at semiconducting heterointerfaces

Samuel C. Johnson,Shiqian Hu,Jun Nishida,Peter A. Chabal,Baowen Li,Markus B. Raschke

Conference on Lasers and Electro-Optics（2022）

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摘要

We perform ultrafast pump-probe nano-spectroscopic imaging of WSe2-SiO2 interfaces. From transient phonon softening as a local probe of substrate temperature, we resolve heterogeneity in ps thermalization and quantify interfacial boundary conductance.

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关键词

nanothermometry,thermal transport,semiconducting heterointerfaces,ultrafast pump-probe nanospectroscopic imaging,WSe2-SiO2 interfaces,transient phononsoftening,local probe

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