研究目的
Investigating the quantum statistical and correlation properties of photons generated in a multiparticle spaser and proposing a model of an effective subwavelength source of entangled photons controlled by an external magnetic field.
研究成果
The study demonstrates the possibility of entangled photons forming in a three-particle spaser due to nonlinear processes with biexciton states in quantum dots. The practical work output is associated with using the effect to create highly effective bright sources of nonclassical photons.
研究不足
The study is theoretical, and practical implementation may face challenges related to the geometric accuracy and chemical purity of the individual components (the NP and QD), along with their relative position in the spaser. The effect of the magnetic field on the quantum state of a pair of decaying excitons in a QD may depend on the shape of the particles.
1：Experimental Design and Method Selection:
The study involves a theoretical model of a three-particle spaser consisting of two nanoparticles (NPs) and one quantum dot (QD), where biexciton states decaying with the formation of entangled plasmons localized at the NPs are realized. The model considers the effects of an external magnetic field on the system.
2：Sample Selection and Data Sources:
The model uses CdSe quantum dots and gold nanoparticles of specific sizes to establish plasmon resonance in the system.
3：List of Experimental Equipment and Materials:
The study involves theoretical modeling without specific experimental equipment, focusing on the parameters of CdSe QDs and gold NPs.
4：Experimental Procedures and Operational Workflow:
The study involves deriving and solving the Hamiltonian of nonlinear plasmon–exciton interaction inside the spaser system, considering the effects of an external magnetic field.
5：Data Analysis Methods:
The analysis involves numerical simulation of the system for bilinear combinations of plasmons' and excitons' operators to obtain the time dependence of photon cross-correlation function.
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