Investigation On Transmission Characteristics Of Electromagnetically Induced Lattice In Rubidium Atom

Quantum manipulation is a frontier subject based on quantum physics,and it has important scientific values in the research of quantum information processing and quantum simulation.With the help of external field and technical methods,we can design and construct artificial microstructures,which are significant to establish new quantum manipulation technologies and the miniaturization of quantum devices.Atomic energy levels,atomic quantum manipulation,and atomic imaging mechanisms are important carriers for constructing various future electronic devices at the atomic level,and they are the foundation and core of atomic-scale devices.The atomic coherence effect performs quantum manipulation by using external fields.In particular,an electromagnetically induced lattice is constructed by introducing a standing-wave field into the electromagnetically induced transparency effect.It can effectively overcome the inconvenient tuning problem of solid periodic structure and realize all-optical adjustable periodic dielectric structure.This research has excellent application values in the design and integration of quantum manipulation devices,and it effectively expands the development of precision measurement and topological photonics.This thesis focuses on the construction,manipulation and optical transmission characteristics of electromagnetically induced lattices in rubidium atoms.The main contents are as follows:1.In the three-level coherent system of rubidium atoms,a one-dimensional all-optical controllable induced lattice is constructed by using an interference field,and the electromagnetically induced lattice is precisely adjusted by changing experimental parameters such as frequency detuning,Rabi frequency,and atomic density.A clear three-order diffraction pattern is obtained,and the first-order diffraction efficiency reaches 25 % in our work.2.In a V+Ξ configuration atomic system containing the Rydberg level,a new all-optical controllable electromagnetically induced lattice is realized.Compared with the V-type three-level case,a significant improvement of the diffraction efficiency of this novel lattice was observed.By inducing the Raman gain effect of the control laser field,the first-order diffraction efficiency reaches 32.5 %.3.In a three-level cascade-type coherent atomic system,an electromagnetically induced square optical lattice(EISL)is constructed with two orthogonal standing-wave fields for the first time.By precisely adjusting the experimental parameters,a clear 7×7 square diffraction array is obtained.This work realizes the dimensional expansion of the all-optical adjustable artificial microstructure.