Regulation And Investigation Of Nanolasing Based On Lattice Plasmons

Surface Plasmons(SPs)are hybrid quasi particle of light-matter ineraction when incident light driven on a metal surface.The incident light with partiular frequency can couples with free electrons on metal surface,leading to a new train of optical effects at the nanoscale,and forms a new discipline,Plamonics.There are two kinds of SPs,the first is the surface plasmon polaritons(SPPs)on a metalic film,which requires momentum-matching for excitation.The second is the localized surface plamsons(LSPRs)from metallic particles.Since,SPs need to consider phase mismatch,ohmic damping and other system losses,which greatly limits their development and application.With the development of nano fabrication,it is possilbe to aligned the particles into periodically plamsonic lattice.When the lattice constant is on the order of subwavelength scales,the incident light is collectively scattered to form a diffracted wave pattern,or called a far-field Bloch diffraction pattern.If this far-field diffraction mode spectral overlaps with the resonant LSPRs of a single nanoparticle,the mode coupling between them leads to constructive and desconstructive interferece,resulting in a new hybird mode of Surface Plasmon Resonances(SLRs).Since SLRs can effectively suppressing the radiation loss and obtain resonane with a linewidth in a range from 8 to14 nm,and obtain resonant modes with high quality factors.In addition,SLRs can confine the light on the particle surface,which beyond the the optial diffraction limit.Nanolaser,one of the popular research topics in the field of light-matter interaction that has been increasingly emerging in recent years,essentially nanolaser is the use of an optical microcavity with lattice equivocal excitations as the resonant cavity of the laser.The advantages of high quality factor and small mode volume make nanolaser able to break the diffraction limit and become a very promising research field for application.In this thesis,the lattice equiaxed exciton nanolaser will be studied mainly from the following aspects:(1)theoretical preparation of the resonance of the lattice of equiaxed excitons.including the design,simulation and optical characterization of the lattice,the establishment of the null lattice approximation model.(2)High-symmetry point evolution of anodic aluminum oxide(AAO).This chapter focuses on a comprehensive and detailed study of the lattice,and the changes of the lattice on the equipartite excitations and the differences in optical characterization through the carrier of AAO.Based on the results of the modulation,the amplified spontaneous radiation of the equinoctial excitations is realized,and the optical properties such as the magnification and the polarization since are analyzed.Theoretical and experimental preparations are made for the realization of nanolaser excitation phenomena.(3)Aluminum nanocone composite luminescent molecules to realize rare-earth upconversion red light emission and nanolaser excitation phenomena.The lattice structure of aluminum nanocone and rare-earth materials are used to realize the enhanced spontaneous red light emission from upconverted rare-earth luminescent materials with multiple sub-stable energy levels;the composite with Nile red dye molecules is used to realize the nanolaser excitation phenomenon based on lattice equipartition excitonic resonance,and the optical properties of the system are characterized and analyzed.