研究目的
To study the nonlinear absorption of laser over a dielectric surface in the presence of metallic nanorods.
研究成果
The nanorods over a dielectric surface offer an efficiently absorbing layer for infrared laser, with large absorption at surface plasmon resonance. High intensity picosecond laser pulses lead to heating of electrons and nanorod expansion, with plasmon resonance evolving in time. The absorption peaks are sharp and size dependent, decreasing with increased separation between nanorods.
研究不足
The study is limited to the analytical formalism and does not include experimental validation. The effects of nanorod expansion and electron heating are considered, but practical constraints like material defects and environmental factors are not accounted for.
1:Experimental Design and Method Selection:
The study involves an analytical formalism of laser absorption in a nanorod embedded dielectric surface. A laser is impinged on nanorods with an electric field perpendicular to their lengths, imparting oscillatory velocity to nanorod electrons.
2:Sample Selection and Data Sources:
The samples are metallic nanorods embedded in a dielectric surface.
3:List of Experimental Equipment and Materials:
A laser is used to impinge on the nanorods.
4:Experimental Procedures and Operational Workflow:
The laser's interaction with the nanorods is analyzed to study the absorption coefficient and electron heating.
5:Data Analysis Methods:
The power absorbed per unit time per unit area in the nanorods is calculated to determine the absorption coefficient.
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