네 준위 원자계의 광쌍안정과 전자기유도 회절격자에 대한 이론적 고찰

Title
네 준위 원자계의 광쌍안정과 전자기유도 회절격자에 대한 이론적 고찰
Authors
샤오즈홍
Keywords
네준위원자계의광쌍안정과전자기유도회절격자에대한이론적고찰
Issue Date
2011
Publisher
인하대학교
Abstract
In past few decades, atomic coherence and interference as a result of interaction between light and matter, has been paid tremendous attention due to the wide application, such as nonlinear optics, light velocity control and light storage, quantum information. In present thesis, in the various four-level atomic systems, we have studied the properties of optical bistability (OB) and electromagnetically induced grating (EIG) based on microwave-assisted quantum coherence. First, by numerical simulations, we analyze the hybrid behavior of absorption-dispersion for optical bistability in an optical system which consists of a microwave-coupled four-level tripod-type atomic system and a unidirectional optical cavity. Second, the theoretical investigation of electromagnetically induced grating (EIG) is developed in two different four-level atomic systems. Atomic grating is a hybrid of amplitude and phase gratings. Then, in a microwave-coupled four-level atomic system, by comparing the amplitude grating and phase grating, we find that the diffraction efficiency of phase grating is better than that of amplitude grating. And the diffraction efficiency of phase grating is increased dramatically in the presence of the microwave field. Next, the property of phase grating is discussed in a four-level system with a degenerate probe field.
Description
Abstract I Chapter 1: Introduction 1 1.1 Hanle Effect 4 1.2 Coherent Population Trapping (CPT) 8 1.3 Electromagnetically Induced Transparency(EIT) 13 1.4 High Refractive Index without Absorption 19 1.5 Electromagnetically Induced Grating (EIG) 22 1.6 Atomic coherence induced by microwave field : EIT controlled by microwave field 27 Chapter 2: Optical Bi-stability via Atomic Coherence 31 Chapter 3: Electromagnetically Induced Grating 55 3.1 EIG by microwave modulation 56 3.2 Double-probe EIG 76 Chapter 4: Conclusions 91 Acknowledgements 94 References 95 Appendix: Matlab Programs 106
URI
http://dspace.inha.ac.kr/handle/10505/22492
Appears in Collections:
College of Natural Science(자연과학대학) > Physics (물리학) > Theses(물리학 석박사 학위논문)
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