| Autor: |
Chernykh, E. A., Kharintsev, S. S. |
| Zdroj: |
Optoelectronics Instrumentation & Data Processing; Feb2023, Vol. 59 Issue 1, p109-115, 7p |
| Abstrakt: |
Under the action of light under the conditions of plasmon resonance, metal nanoparticles induce nanoscale heating. This effect forms the basis for thermoplasmon probing of phase changes occurring in the nanoscale systems whose investigation is the key problem in the modern materials science. Despite an evident simplicity of such an approach, intensive absorption of light by resonance nanostructures does not ensure the desired optical heating in the cases when the thermal conduction of the medium significantly exceeds that of the plasmonic nanostructure. We propose the approach to creation of the controlled heating of plasmonic nanostructures by nanostructuring the thermostat surface, which is demonstrated with the help of the thermoplasmonic metasurface, which is an array of TiN:Si voxels—the vertical system of nanostructures of titanium nitride (TiN) and silicon (Si) on a silicon substrate. The plasmonic nanostructures of TiN play the role of nanoheaters, while varying the height of silicon thermal conductors makes it possible to control the temperature of heating of the voxels at a fixed value of pump intensity owing to the control of heat localization. The possibility of probing phase transitions in the nanoscale systems is demonstrated by an example of thin polymer films with the use of thermoplasmonic metasurface and Raman spectroscopy. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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