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Controlling the Heat Dissipation in Temperature-Matched Plasmonic Nanostructures.
Alessandro Alabastri1, Mario Malerba2, Eugenio Calandrini2
1Department of Physics and Astronomy and Department of Electrical and Computer Engineering, Rice University , 6100 Main Street, Houston, Texas 77005, United States.
Nano Letters
|August 1, 2017
Summary
Temperature significantly impacts how plasmonic nanostructures convert light to heat. Tailoring nanostructure geometry allows control over this light-to-heat conversion rate, enabling temperature-dependent optical heating.
Area of Science:
- Plasmonics
- Nanophotonics
- Optical Engineering
Background:
- Heat dissipation in plasmonic nanostructures is typically modeled without considering temperature's effect on optical properties.
- Temperature influences nanostructure absorption efficiency, altering the energy-to-heat conversion process.
Purpose of the Study:
- To investigate and demonstrate theoretically and experimentally how temperature influences light-to-heat conversion in plasmonic nanostructures.
- To show how nanopatterning can control the temperature dependence of optical heat dissipation.
Main Methods:
- Analytical modeling based on antenna theory and matching conditions.
- Numerical calculations of optical response and heat dissipation.
- Experimental fabrication and characterization of metallic nanostructures.
Main Results:
- Temperature sets a maximum limit for absorption efficiency, which can be tuned by nanostructure geometry.
- The nonlinear dependence of absorption on electron-phonon damping can be maximized at specific temperatures.
- Geometrically different nanostructures exhibit opposite temperature dependencies for heat dissipation.
Conclusions:
- Plasmonic nanostructures offer a pathway to temperature-controlled optical heat dissipation.
- Nanostructure design is crucial for tailoring the light-to-heat conversion rate in a temperature-dependent manner.
