2021/09/09 by Rupesh Ghimire, Cody Hunley, Ghimire, Rupesh +9
Computer Science · Engineering · Materials Science · #FOS: Physical sciences #Gold and Silver Nanoparticles Synthesis and Applications #Mesoscale and Nanoscale Physics (cond-mat.mes-hall) #Optics (physics.optics) #Plasmonic and Surface Plasmon Research #Quantum Information and Cryptography
paper · pdf · doi:10.48550/arxiv.2109.03980
openalex publication_date 2021/09/09 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
We theoretically study a nanospaser system, which consists of a spherical silver nanoparticle embedded inside a sphere composed of dye molecules. The gain of the system, dye molecules, are described by a three-level model, where the transition frequency between the lowest two energy levels is close to the surface plasmon frequency of the nanosphere. Contrary to a two-level model of spaser, the three-level model takes into account finite relaxation time between the high energy levels of the gain medium. These relaxation processes affect both the spaser threshold and the number of generated plasmons in the continuous wave regime. While for a two-level model of a spaser the number of generated plasmons has a linear dependence on the gain, for the three-level model this dependence becomes quadratic.