研究目的
Investigating the near-?eld resonances in photon emission via interaction of electrons with coupled nanoparticles.
研究成果
The study demonstrates that the interaction between two coupled nanoparticles significantly affects the radiation processes, leading to spectral shifts, increased radiation intensity, and oscillations in radiation intensity even at distances exceeding the nanoparticles' sizes. This highlights the importance of considering particle interactions in the analysis of radiation from complex systems.
研究不足
The study is limited by the long-wave approximation, which assumes the size of the nanoparticles is much smaller than the wavelength of the radiation. Additionally, the analysis is restricted to systems of two interacting particles, and the extension to more complex systems may require numerical methods.
1：Experimental Design and Method Selection:
The study employs a first-principles theory approach to analyze near-field resonances in a system of two coupled nanoparticles excited by an external field, specifically a fast electron passing by. The methodology includes constructing rigorous analytical solutions for the radiation field and its distribution over angles and frequencies.
2：Sample Selection and Data Sources:
The analysis focuses on two different coupled nanoparticles, with the external field being that of a fast electron. The nanoparticles are considered in the long-wave approximation, ensuring the validity of the dipole approximation.
3：List of Experimental Equipment and Materials:
The theoretical study does not specify physical equipment but relies on mathematical models and simulations to analyze the system.
4：Experimental Procedures and Operational Workflow:
The study involves solving Maxwell's equations for the system, considering the Fourier-image of the equations to express the field through the current density, and analyzing the resulting radiation field and intensity distribution.
5：Data Analysis Methods:
The analysis includes numerical evaluation of the obtained analytical solutions to study the spectral distribution of radiation and the effect of interaction between nanoparticles on the radiation intensity.
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