Abstract
All-dielectric nanophotonics attracted high interest during last years in the field of thermal applications and optical heating mainly due to the ability of electromagnetic field localization inside the nanostructures due to different resonant modes excitation. However, most conventional dielectrics and semiconductors (e.g. silicon, germanium etc.) are transparent in the near-IR, and, thus, optical heating in this region becomes a challenging task. In this work, we reveal that carrier doping can significantly increase optical heating of a resonant silicon nanodisk, without changing its optical properties dramatically. In addition, semiconductor nanostructures support high-Q thermally responsive Raman signal, which can be used as the temperature sensor at the nanoscale. We believe, that such approach might be very effective for numbers of applications, including bio-medical ones, by working in the’biological tissue window’.
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