共查询到18条相似文献,搜索用时 171 毫秒
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与“V”型三能级原子相互作用的双模光场的相位特性 总被引:1,自引:0,他引:1
应用Pegg-Barnett相位理论,得到了与“V”型三能级原子相互作用的双模光场的相位几率分布函数,给出了极强和极弱光场条件下光场和相位几率分布表达式,分析了相位几率分布与光场强度及原子的初始状态的关系。结果表明,光场的相位分布及涨落与其强度和原子的初始态度切相关。 相似文献
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求得双频场作用下串接型三能级原子系统哈密顿量的本征函数和本征值。从而得到原子初态任意、偏调任意情况下原子随时间的演化。给出了原子布居数和原子极化与初始原子状态的关系和与偏调的关系公式。研究了原子动力学行为与入射光强、偏调、二入射光场的相对相位以及原子初始状态的关系。揭示了原子初始相位和光场相位对原子光相互作用大小的影响。当相对相位为π时,原子与场耦合最小,在特殊情况下原子与场耦合为零,即原子与场无相互作用。 相似文献
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应用Pegg-Barnett相位理论,数值计算得到了压缩相干态场与耦合双原子相互作用的相位概率分布曲线.结果表明:开始时相位概率呈对称的三峰高斯结构,此结论与文献的结论一致.而且由于压缩光场的影响使场的相位分布呈现出:中峰的峰值最大,且远远超过二边峰的两倍,这与相干光场显示的“中峰的峰值是二边峰的两倍”的结论不同. 相似文献
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双原子与光场依赖强度耦合相互作用的动力学性质 总被引:4,自引:2,他引:2
本文研究了双原子与单模光场依赖强度耦合相互作用的动力学性质,讨论了双原子和场的初态及原子-原子间耦合强度对双原子动力学性质的影响. 相似文献
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压缩真空场与耦合双原子Raman 相互作用系统中原子和光场的压缩性质 总被引:2,自引:2,他引:0
定义了双原子偶极矩的差压缩,利用全量子理论研究了单模压缩真空场与耦合双原子Raman相互作用系统中原子偶极矩差压缩和光场振幅平方压缩的时间演化特性,并通过数值计算讨论了光场的初始压缩参数、原子初态以及原子间偶极-偶极相互作用强度对原子和光场压缩特性的影响。 相似文献
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利用全量子理论及部分转置矩阵负本征值的方法,研究了存在相位退相干时多光子T-C模型中两个二能级原子与数态光场相互作用系统中两原子的纠缠演化特性。讨论了相位退相干系数、原子间偶极-偶极相互作用系数、跃迁光子数对原子间纠缠演化特性的影响。结果表明:相位退相干因子并不能完全破坏两原子间的相干性,而是衰减了原子间纠缠度的振荡幅度。随着偶极相互作用系数的增大和跃迁光子数的增多,两原子最终处于纠缠度值较稳定的纠缠态;两纠缠原子的相干性越好,两原子越容易达到纠缠度值较大且稳定的纠缠态。 相似文献
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Yazaki P.A. Komori K. Arai S. Endo A. Suematsu Y. 《Lightwave Technology, Journal of》1992,10(9):1247-1255
Compensation of light source chirping and optical fiber dispersion using semiconductor laser amplifiers (SLAs) is investigated using a modeling equation that describes the opposite phase characteristics of light sources to SLAs with self phase modulation. A two-section SLA was fabricated in order to achieve an amplifier with both high gain and phase compensation properties. Preliminary experimental results are presented, confirming the theoretically derived phase compensation effect 相似文献
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Andrei V. Kabashin Vasyl G. Kravets Fan Wu Shinji Imaizumi Victoria O. Shipunova Sergey M. Deyev Alexander N. Grigorenko 《Advanced functional materials》2019,29(26)
Light scattered by an object contains plethora information about the object which is distributed evenly among all possible Fourier components of light observed in the far‐field. There are some cases, however, where this information is accumulated in the light confined by the object and then encoded in just a few coherent optical beams. Here, Fourier nanotransducers based on 2D plasmonic metamaterials are introduced, which are capable of confining light in 2D plane contacting with a functional interface, gathering information about its properties, and then transmitting the information into discrete optical beams with amplified phase relations. It is shown that phase of light in such beams can be used for probing dynamic physical properties of 2D materials and performing bio/chemical sensing with unprecedented sensitivity. Using a Fourier transducer based on periodic gold nanostructures, ferroelectric response from a single atomic layer of MoS2 is resolved and studied for the first time, as well as the detection of important antibiotic chloramphenicol at fg mL?1 level is demonstrated, which several orders of magnitude better than reported in the literature. The implementation of phase‐responsive Fourier nanotransducers opens new avenues in exploration of emergent 2D structures and radical improvement of biosensing technology. 相似文献
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偏振光在冰水混合云中的传输特性 总被引:1,自引:0,他引:1
根据米氏理论,分别计算了由纯水、纯冰和冰-水同心球形粒子构成的平面平行、各向同性云层的单次散射特性(单次散射反照率、不对称因子以及单次散射相矩阵).根据辐射传输理论,利用累加法求解了矢量辐射传输方程,得到了3种不同构成云层的多次散射矩阵,对不同波长的太阳光的反射特性进行了比较.结果表明,反射光的偏振度比强度对云层的微观... 相似文献
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Ebbers C.A. DeLoach L.D. Webb M. Eimerl D. Velsko S.P. Keszler D.A. 《Quantum Electronics, IEEE Journal of》1993,29(2):497-507
The harmonic generating properties of potassium lanthanum nitrate (KLN) and potassium cerium nitrate (KCN) are described. These crystals have much larger nonlinear coefficients than potassium dihydrogen phosphate (KDP) and are nearly noncritically phase matched at room temperature for Type I frequency doubling of 1.064-μm light, and for Type II doubling of light near 0.95 μm. Thus, these crystals are useful for generating blue-green light by frequency doubling high-power near-infrared lasers. The crystal growth of KLN and KCN are described by the three component phase diagrams. Crystallographic data for KCN that confirms its structural similarity to KLN are presented. The optical absorption spectra of the two materials are discussed, and the linear refractive indexes are given 相似文献
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