研究目的
Investigating the effect of electromagnetic coupling between localized surface plasmons in a metallic nanoparticle and excitons or weakly interacting electron-hole pairs in a semiconductor matrix.
研究成果
The study demonstrates that the optical properties of nanocomposite systems composed of plasmonic nanoparticles embedded in a semiconductor matrix result from the coupling between localized surface plasmons and excitons or free-carrier interband transitions. The use of the renormalized polarizability derived in this work permits to obtain a very good fit to the experimentally measured LSPR lineshape, highlighting the importance of the renormalization effect in matrices where interband light absorption, overlapping with the LSPR, takes place.
研究不足
The study focuses on spherical nanoparticles and does not consider less symmetric shapes. The analysis is limited to the electrostatic approximation and does not account for higher multipole contributions.
1：Experimental Design and Method Selection:
The study involves theoretical modeling and numerical calculations to derive an expression for the NP polarizability renormalized by the coupling between localized surface plasmons and excitons or electron-hole pairs in the semiconductor matrix.
2：Sample Selection and Data Sources:
The analysis includes gold nanoparticles embedded in a CuO film and GaAs matrix, with parameters taken from experimental data and literature.
3：List of Experimental Equipment and Materials:
Not explicitly mentioned in the provided text.
4：Experimental Procedures and Operational Workflow:
The methodology involves deriving a compact formula that generalizes the NP's polarizability for the case of coupling with excitonic transitions in the matrix.
5：Data Analysis Methods:
The analysis includes fitting the theoretically calculated LSPR lineshape to experimentally measured data using the renormalized polarizability.
独家科研数据包，助您复现前沿成果，加速创新突破
获取完整内容
