Regulation Of Spontaneous Emission And Lateral Casimir Force By SiC Nanowires Hyperbolic Metamaterials

In recent years,hyperbolic metamaterials(HMMs)have attracted wide attention.They are an artificial composite material,which have hyperbolic dispersion properties.Compared with ordinary materials,hyperbolic metamaterials have more excellent optical properties and many unique physical properties that ordinary materials do not have.Hyperbolic metamaterials have important applications in enhancing near-field radiant heat transfer and spontaneous radiation of atoms.The research of this thesis mainly includes two aspects: firstly,the sandwich structure constituting graphene and hyperbolic metamaterial(HMM)that is made of Si C nanowires is proposed to study the spontaneous emission of quantum emitter.Compared with that occurring only in the hyperbolic bands near the single HMM,the enhancement of spontaneous emission of quantum emitter near the sandwich can emerge both in and out of the hyperbolic bands.The superradiance of two quantum emitters connected by the sandwich structure in the transmission configuration has also been studied in detail.The superradiance can also be attained both in and out of the hyperbolic bands in a broad frequency range.When the distance between two quantum emitters becomes larger,the superradiance still exists by actively controlling the chemical potential of graphene.The results obtained in this study are not only meaningful for modulating the interaction between atoms or quantum emitters,but also helpful in studying the light–matter interaction.Second,we study the lateral Casimir forces acting on the rotating particles with small radius of 50 nm as well as that with large radius of 500 nm near the hyperbolic metamaterial made of Si C nanowires.It is found that the lateral Casimir force acting on the small particle of 50 nm near hyperbolic metamaterial with appropriate filling fraction can be enhanced nearly four times comparing with that acting on the same particle near Si C bulk in the previous study.Such enhancement is caused by the coupling between the resonance mode excited by nanoparticle and the hyperbolic mode supported by hyperbolic metamaterial.The results obtained in this study provide an efficient method to enhance the interaction of nanoscale objects.