研究目的
Investigating the spatially defined arrangement of metallic nanoparticles in a stable glass matrix using nanosecond excimer laser irradiation for plasmonic applications.
研究成果
Periodic arrangements of plasmonic nanoparticles in glass with periods down to 1–2 μm have been obtained by structured excimer laser irradiation of Ag-doped glass and Au-coated glass. The contrast of the plasmonic absorption between irradiated and non-irradiated lines is significant, with potential for further optimization.
研究不足
The process window for strongly localized implantation without reablation or lateral spreading seems to be rather narrow. Thermal and material diffusion may limit the achievable contrast for sub-micron patterns.
1:Experimental Design and Method Selection:
The study uses nanosecond excimer laser irradiation at 193 nm for the spatially defined arrangement of metallic nanoparticles in glass. Two methods are employed: laser-induced formation of particles from a dopant material pre-incorporated in the glass and particle formation and implantation by irradiation of material pre-coated on top of the glass.
2:Sample Selection and Data Sources:
Commercial soda-lime float glass slides of 1 mm thickness are used. Silver ions are introduced into the glass network by an isothermal Ag-Na ion exchange process. For gold implantation experiments, glass samples are sputter-coated with gold.
3:List of Experimental Equipment and Materials:
ArF excimer laser (Lambda Physik LPX315), UV-Vis-NIR microscope photometer (Carl Zeiss MPM 100), scanning electron microscopy (Zeiss EVO MA10), scanning transmission electron microscopy (FEI Titan3 80-300), sputter coater (EMITECH K550).
4:0). Experimental Procedures and Operational Workflow:
4. Experimental Procedures and Operational Workflow: Spatially resolved irradiation is performed with an ArF excimer laser in combination with a mask projection setup. The laser pulse repetition rate is adjusted based on the experiment (10 Hz for Ag-doped glass and 1 Hz for Au-coated glass).
5:Data Analysis Methods:
The resulting modifications are investigated using UV-Vis-NIR microscopy, SEM, and STEM. The contrast of the line patterns generated by the formed particles is defined and measured.
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Scanning Transmission Electron Microscope
Titan3 80-300
FEI
Used for detailed imaging of cross-sections through the modified glass samples.
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UV-Vis-NIR microscope photometer
MPM 100
Carl Zeiss
Used to investigate the modifications in the glass samples, recording transmission spectra.
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Scanning Electron Microscope
EVO MA10
Zeiss
Used for imaging the surface of the modified glass samples.
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ArF excimer laser
LPX315
Lambda Physik
Used for spatially resolved irradiation of glass samples to form and implant plasmonic nanoparticles.
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Sputter coater
K550
EMITECH
Used to coat glass samples with gold for the implantation experiments.
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