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Hierarchically Doped Plasmonic Nanocrystal Metamaterials.
Kihoon Kim1, Zachary M Sherman1, Angela Cleri2
1McKetta Department of Chemical Engineering, University of Texas at Austin, 200 E Dean Keeton Street, Austin, Texas 78712, United States.
Nano Letters
|August 9, 2023
Summary
This study demonstrates a new method for tuning plasmon resonance in nanocrystal metasurfaces by varying doping at multiple scales. This approach expands the design possibilities for advanced optical metamaterials.
Area of Science:
- Materials Science
- Nanotechnology
- Optics
Background:
- Plasmonic nanocrystal superlattices offer unique optical properties.
- Metamaterial property tuning is limited by single-component designs.
Purpose of the Study:
- To explore multiscale doping for enhanced control over plasmon resonance in nanocrystal metasurfaces.
- To overcome limitations of single-component metamaterials.
Main Methods:
- Simulations of indium tin oxide nanocrystal mixtures with varying doping.
- Experimental fabrication and characterization of nanocrystal-based metasurfaces.
Main Results:
- Continuous doping variation tunes plasmon resonance frequency and bandwidth independently.
- Observed tunable reflectance and absorption bands due to collective resonances.
- Predicted near-zero permittivity in a broad infrared spectral region.
Conclusions:
- Multiscale doping is a powerful strategy for designing tunable metamaterials.
- Enables independent control of resonance frequency and bandwidth.
- Opens new avenues for optical applications.
Keywords:
ENZindium tin oxideinfraredlocalized surface plasmon resonancemetasurfacesuperlatticetransparent conducting oxide
