Resonant Nonplasmonic Nanoparticles for Efficient Temperature-Feedback Optical Heating

We propose a novel photothermal approach based on resonant dielectric nanoparticles, which possess imaginary part of permittivity significantly smaller as compared to-metal ones. We show both experimentally and theoretically that a spherical silicon nanoparticle with a magnetic quadrupolat, Mie resonance converts light to heat up to 4 times more effectively than similar spherical gold nannparticle at the same heating conditions. We observe photoinduced temperature raise up to 900 K with the silicon-nanoparticle on a glass substrate at modetate intensities (<2 mW/mu m(2)) and typical laser wavelength (633-nm). The advantage of using crystalline silicon is the simplicity of local temperature control by means:of Raman spectroscopy working in a broad range of temperatures, that is, up to the melting point of silicon,(1090 K) with submicrometer spatial resolution. Our CMOS-compatible heater-thermometer nanoplatform paves the way to novel nonplasmonic photothermal applications, extending the temperature range and: simplifying the thermoimaging procedure.