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Localized Surface Plasmon Resonance Dependence on Misaligned Truncated Ag Nanoprism Dimer
Hanning Yang1,2,3, Edgar Oduor Owiti1,2,3, Xiangqian Jiang1,2,3
1Institute of Modern Optics, Department of Physics, Harbin Institute of Technology, Harbin, 150001, China.
Nanoscale Research Letters
|July 5, 2017
Summary
This study models truncated silver nanoprism dimers, revealing how misalignment and truncation tune localized surface plasmon resonance (LSPR). These findings offer insights for designing advanced nanodevices.
Area of Science:
- Nanophotonics
- Plasmonics
- Materials Science
Background:
- Self-assembly of silver nanoprism dimers often yields misaligned, edge-to-edge structures.
- Silver nanoprisms are prone to truncation in acidic environments during preparation, affecting their optical properties.
Purpose of the Study:
- To investigate the impact of truncation and misalignment on the localized surface plasmon resonance (LSPR) of silver nanoprism dimers.
- To provide a deeper understanding of how structural variations influence plasmonic behavior.
Main Methods:
- Numerical modeling of truncated silver nanoprism dimers with varying degrees of edge-to-edge misalignment.
- Utilizing the finite element method (FEM) for electromagnetic simulations.
Main Results:
- Resonant wavelength and intensity of the dimer are tunable by adjusting misalignment length.
- Increasing misalignment leads to a stronger short-wavelength peak and a weaker long-wavelength peak.
- Truncation length also provides a means to tune resonant wavelengths and intensities.
Conclusions:
- Structural parameters like misalignment and truncation significantly influence the LSPR of silver nanoprism dimers.
- The findings demonstrate potential applications in tunable nanoswitches and multi-channel biosensors.
