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Updated: Jan 27, 2026
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Colloidal Synthesis of Nanopatch Antennas for Applications in Plasmonics and Nanophotonics
Published on: May 28, 2016
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Hybridized Guided-Mode Resonances via Colloidal Plasmonic Self-Assembled Grating
Swagato Sarkar1,2, Vaibhav Gupta1, Mohit Kumar1,2
1Institute for Physical Chemistry and Polymer Physics , Leibniz-Institut für Polymerforschung Dresden e.V. (IPF) , Hohe Str. 6 , 01069 Dresden , Germany.
ACS Applied Materials & Interfaces
|March 16, 2019
Summary
Researchers developed a new method using self-assembled gold nanoparticles to guide light, extending the observation range of hybridized modes for photonic applications like optical filters and sensors.
Area of Science:
- Photonics and Nanotechnology
- Plasmonics and Optics
Background:
- Confining light at specific wavelengths with low losses is crucial for photonic applications.
- Existing methods for exciting waveguide-plasmon polaritons are limited to specific polarizations.
- Plasmonic gratings are essential for controlling light-matter interactions.
Purpose of the Study:
- To develop a novel plasmonic grating using colloidal self-assembly for selective resonant mode guidance.
- To investigate the optical properties and dispersion relations of nanoparticle-based hybrid structures.
- To explore the potential of these structures in energy conversion, optical filters, and refractive index sensing.
Main Methods:
- Fabrication of a plasmonic grating using colloidal self-assembly of gold nanoparticles on a titanium dioxide (TiO2) layer.
- Utilizing an ultrathin injection layer for selective guidance of resonant modes.
- Characterization of the dispersion relation using ultraviolet-visible-near-infrared spectroscopy.
- Validation and analysis using finite-difference in time-domain (FDTD) simulations.
Main Results:
- Successfully guided resonant modes along nanoparticle chain lines using a self-assembled plasmonic grating.
- Identified optical band gaps as hybridized modes resulting from plasmonic and photonic resonances.
- Extended the observation range of hybridized guided modes compared to traditional metallic grids.
- Demonstrated the potential for cost-efficient and upscalable directed self-assembly methods.
Conclusions:
- The developed plasmonic grating enables selective guidance of hybridized modes, overcoming limitations of previous methods.
- These self-assembled structures offer a versatile platform for advanced photonic applications.
- Future applications include enhanced energy conversion, tunable optical filters, and sensitive refractive index sensors.
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