Metal nanocrystals exhibit strong plasmon resonances and have the ability to absorb and scatter light very efficiently. Our study concerns special designs of plasmonic nanostructures with electromagnetic hot spots, where the energy of incident light concentrates. Overall plasmonic nanostructures with hot spots demonstrate strongly amplified energy-related effects. (1) Using such nanostructures, one can strongly enhance optical generation of heat and also confine high photo-temperatures in small volumes. (2) Plasmonic hot spots efficiently generate energetic electrons, which can be used for photochemistry and photodetection. (3) Plasmonic metamaterial absorbers and bolometers with a chiral geometry exhibit giant photothermal circular dichroism. In such structures, the photoinduced temperature strongly depends on the helicity of circular-polarized incident wave.

Conversion of light energy into heat and hot electrons using hybrid nanostructures with plasmonic hot spots

256th National Meeting (2018)

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