Optical Properties Of Quantum Dots Coated Silver Nanowires

Recent years,investigations on the performance improvement of nanophotonic circuits has become an important trend.The reduction of the size of nanophotonic devices,the improvement of the operation speed of devices,and the development of new functional devices are the main research hotspots.Researchers from all around are committed to developing micro-nano devices based on various nanomaterials and applying them to integrated circuits for multifunction,high-performance integrated nanophotonic circuits.Hybrid systems composed of multiple quantum emitters coupled with plasmonic waveguides are promising building blocks for future integrated quantum nanophotonic circuits.The silver nanowires supporting surface plasmons become a feasible solution for plasmonic waveguides,and Cd Se-Zn S quantum dots with excellent luminescent properties become important carriers for quantum emitters.Here,we constructed composite nanostructures by quantum dot emitters and silver nanowire plasmon waveguides,and studied the light emission,light propagation,optical wavelength conversion and surface plasmon light modulation characteristics in the structure,and realized exciton-plasmon interactions,which provides a preliminary preparation for the implementation of multiplexing technology.The innovations of this thesis are as follows:1.Using silver nanowires as plasmon waveguides and quantum dots as quantum emitters to construct quantum dot coated silver nanowire composite structures.2.When one end of the silver nanowire is excited by a laser with a wavelength of 532 nm,a quantum dot fluorescence at wavelength of 600 nm appears at the other end of the nanowire.3.Reveal the mechanism of exciton-plasmon conversion in the composite structures,and provide theoretical basis for the construction and integration of nanophotonic circuits.