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Strong light coupling effect for a glancing-deposited silver nanorod array in the Kretschmann configuration
Yi-Jun Jen1, Wei-Chih Liu1, Jung-Hui Chao1
1Department of Electro-Optical Engineering, National Taipei University of Technology No. 1, Sec. 3, Chung-Hsiao E. Rd, Taipei 106, Taiwan.
Nanoscale Research Letters
|October 30, 2014
Summary
Thinner silver nanorod arrays (NRAs) show higher light extinction. The thinnest 169 nm NRA achieved over 80% extinction across visible wavelengths, demonstrating potential for optical applications.
Area of Science:
- Nanophotonics
- Optical Metamaterials
- Thin Film Physics
Background:
- Silver nanorod arrays (NRAs) are investigated for their unique optical properties.
- Understanding light-matter interactions in nanostructured materials is crucial for developing new optical devices.
Purpose of the Study:
- To fabricate and characterize slanted silver nanorod arrays (NRAs) with varying thicknesses.
- To investigate the relationship between NRA thickness and attenuated total reflection (ATR) and extinction.
- To analyze the forward scattering properties of the fabricated NRAs.
Main Methods:
- Fabrication of silver NRAs using glancing angle deposition.
- Kretschmann configuration setup for ATR measurements.
- Spectroscopic analysis of extinction and forward scattering.
Main Results:
- Attenuated total reflection observed across visible wavelengths for both s- and p-polarization.
- Extinction is inversely proportional to silver NRA thickness.
- The 169 nm thick NRA exhibited over 80% extinction in the visible spectrum.
Conclusions:
- Silver nanorod array thickness significantly influences optical extinction.
- Thinner NRAs demonstrate enhanced light absorption and extinction properties.
- The fabricated NRAs show promise for applications in optical filtering and sensing.
