克尔介质中双原子与场拉曼作用系统的腔场谱

Cavity Field Spectrum of Two Atoms Interacting with Two-Mode Field through Raman Process in Kerr Medium

研究了含克尔介质腔中两个耦合二能级原子与双模光场拉曼相互作用过程的腔场谱。通过求解本征方程导出了腔场谱的计算公式,给出了双模初始光场均处于数态时的数值计算结果。发现在两模初始场均为弱场时,克尔效应不仅使峰位右移,还使峰的强度、个数和频率发生改变,破坏峰结构的对称性。在克尔效应较强时,原子之间的耦合对腔场的影响被抑制,谱结构主要由克尔效应决定。在强场条件下,无克尔介质加入时,原子间的耦合作用使各峰的强度都得到加强;随克尔效应的增强,靠近中心频率的主峰迅速增长并很快达到饱和,而远离中心频率的边峰则被抑制并产生劈裂。

The cavity field spectra of two coupling two-level atoms interacting with two-mode field through Raman process in Kerr medium cavity are studied. By solving the eigenequation, the cavity field spectrum expression is given out and some numerical results for the initial two-mode field in pure number states are presented. It is found that the Kerr effect shifts the position of peaks rightward, and affects the height, frequency and number of the peak in the case of weak initial fields. An asymmetric spectral structure appears. When the Kerr effect is strong, the influence of the atoms coupling on the spectra is restrained. The spectral structure is dependent on the Kerr effect mostly. If the field is strong initially intensities of all the peaks are enhanced by atoms coupling interaction for the cavity without Kerr medium; along with accretion of Kerr effect, the main peak near the resonant frequency becomes higher and saturated soon, and the side peaks split and become lower.