Research On Information Transmission Of Dual-optical Nanoantenna Based On Microdisk Cavity

Quantum communication is one of the important fields derived from quantum mechanics and has broad application and development prospects.With the continuous progress of science and technology and technological level,quantum communication has realized the transformation from theory to experiment and then to application.Achieving strong radiative coupling is crucial for quantum communication.This paper mainly proposes a reliable solution to solve the decoherence effect of quantum communication and enhance the information exchange between two quantum radiative.We first design optical nanoantennas that support strong coupling,and analyze and record the modes of their localized surface plasmon resonances.Then,the resonant mode of the whispering gallery mode of the microdisk cavity is studied.By adjusting the structure and size of the microdisk cavity,the resonant mode of the microdisk cavity is consistent with the resonant mode of the nanoantenna,that is,the resonant wavelength of the microdisk cavity is the same as that of the optical nanoantenna.Finally,the nanoantenna is implanted into the microdisk cavity to form a hybrid nanostructure,which realizes information transmission between two quantum emitters at the nanoscale.Research for this dissertation,the enhancement effect of metallic nanoparticles on electric field strength is 3.37 times,and the hybrid nanostructure achieves quantum communication of6.77 ?m.This research provides reliable theoretical guidance and scheme support for the application of quantum communication.The main work and key points of this paper are:Firstly,we chose metallic nanoparticles to enhance radiative coupling.Metallic nanoparticles can support strongly localized surface plasmons,purposefully engineered far-field radiation,and radiative coupling between quantum emitters.Designing metallic nanoparticles with suitable structure and size to enhance the radiative coupling between two quantum emitters is the key of this thesis.After designing the optical nano-antenna,the effect of the nano-antenna to enhance the optical field and the field intensity distribution of the system are studied and analyzed.Secondly,we chose a suitable optical microcavity as the medium environment.The quality factor of the microdisk cavity is very high,which not only can store light energy in the cavity for a long time,but also has a magnifying effect on the light field.It is a good choice to use a microdisk cavity with suitable size as the medium environment of the hybrid nanostructure.Before selecting a microdisk cavity,we should study and analyze the resonance mode of the selected microcavity.Finally,we could implant metallic nanoparticles into the microdisk cavity.Although metallic nanoparticles can effectively enhance the radiative coupling between quantum emitters,they have a large ohmic loss and a low quality factor;we implanted metallic nanoparticles into the microdisk cavity to form a hybrid nanostructure to realize two quantum radiations strong radiative coupling and long-term coherence between particles.Before implanting metallic nanoparticles,we design the size of the microdisk cavity so that the resonance wavelength of the microdisk cavity is close to that of the metallic nanoparticles,so that the hybrid nanostructure can produce strong radiation coupling and long-term coherence.