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Plasmon Resonance in a System of Bi Nanoparticles Embedded into (Al,Ga)As Matrix
Vitalii I Ushanov1, Sergey V Eremeev2,3, Vyacheslav M Silkin4,5,6
1Ioffe Institute, 26 Politekhnicheskaya Str., 194021 Saint Petersburg, Russia.
Nanomaterials (Basel, Switzerland)
|January 11, 2024
Summary
This study shows bismuth nanoparticles in aluminum gallium arsenide can create localized surface plasmon resonance. This plasmonic effect significantly impacts optical properties in high-aluminum-content semiconductors near 2.5 eV.
Area of Science:
- Materials Science
- Optics
- Nanotechnology
Background:
- Localized surface plasmon resonance (LSPR) is crucial for novel optical materials.
- Bismuth (Bi) nanoparticles offer unique plasmonic properties.
- Aluminum gallium arsenide (AlxGa1-xAs) is a versatile semiconductor matrix.
Purpose of the Study:
- To investigate the feasibility of LSPR in Bi nanoparticles embedded in an AlxGa1-xAs matrix.
- To analyze the optical extinction spectra of this metamaterial system.
- To determine the influence of plasmonic nanoparticles on the material's optical properties.
Main Methods:
- Ab initio calculations for the dielectric function of bismuth.
- Utilizing known dielectric properties of AlxGa1-xAs.
- Applying Mie's theory for optical extinction spectra calculations.
Main Results:
- Demonstrated a strong optical extinction band near 2.5 eV due to LSPR.
- Observed that plasmonic extinction dominates optical properties for AlxGa1-xAs with x>0.7 at resonance.
- Confirmed the feasibility of LSPR in the studied system.
Conclusions:
- Bi nanoparticles in AlxGa1-xAs are a viable system for achieving LSPR.
- The plasmonic effect is significant in high-aluminum-content AlxGa1-xAs, influencing its optical behavior near resonance.
- This research opens possibilities for plasmonic metamaterial applications.
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