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| 薄原子蒸气的双光子Dicke窄化选择反射光谱 | |
| 引用本文： | 李院院,侯洵,白晋涛,闫军峰,甘琛利,张彦鹏. 薄原子蒸气的双光子Dicke窄化选择反射光谱[J]. 光学学报, 2008, 28(8): 1623-1627 |
| 作者姓名： | 李院院 侯洵 白晋涛 闫军峰 甘琛利 张彦鹏 |
| 作者单位： | 1. 西北大学光子学与光子技术研究所光电子技术陕西省重点实验室,陕西西安710069;西安文理学院物理系,陕西,西安,710065 2. 西北大学光子学与光子技术研究所光电子技术陕西省重点实验室,陕西西安710069;中国科学院西安光学精密机械研究所瞬态光学与技术国家重点实验室,陕西西安710068 3. 西北大学光子学与光子技术研究所光电子技术陕西省重点实验室,陕西西安,710069 4. 西安交通大学电物理与器件教育部重点实验室,陕西,西安,710049 |
| 摘 要： | 研究了囚禁于两电介质面间的(A)型三能级原子的双光子Dicke窄化选择反射(TDNSR)光谱.通过对不同膜厚及不同抽运光强度的TDNSR线璎的分析,发现由于蒸气中的原子与电介质表面碰撞的消激发效应和薄蒸气膜中的慢原子效应,以及双光子光谱的消多普勒配置,TDNSR线型在很多情形下表现为亚多普勒结构,且线型随 蒸气膜层的厚度与探测光波长的比值呈周期性变化.当L=2mλ/4(m为正整数)时,TDNSR消失.而当2mλ/4< L<(2m 2)A/4时.线型为典型的色散曲线,且L趋近(2m 1)λ/4时对称性增强.精确调谐强抽运光于能级|2>-|3>的跃迁时,在探测光的共振区域△d=0附近,TDNSR极高的变化率表明探测光具有显著的群速变慢效应. |
| 关 键 词： | 光谱学 选择反射光谱 迪克(Dicke)窄化 群速变慢 |
| 收稿时间： | 2007-11-28 |
Two-Photon Dicke-Narrowing Selective Reflection Spectroscopy in Thin Atomic Vapor |
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| Li Yuanyuan,Hou Xu,Bai Jintao,Yan Junfeng,Gan Chenli,Zhang Yanpeng. Two-Photon Dicke-Narrowing Selective Reflection Spectroscopy in Thin Atomic Vapor[J]. Acta Optica Sinica, 2008, 28(8): 1623-1627 | |
| Authors: | Li Yuanyuan Hou Xu Bai Jintao Yan Junfeng Gan Chenli Zhang Yanpeng |
| Abstract: | Two-photon Dicke-narrowing selective reflection (TDNSR) spectroscopy is studied in a system of Λ-type three-level atoms confined between two dielectric walls. TDNSR lines are investigated for the cases of different thicknesses of the vapor film and different strengths of the pump field. Because of de-excited behavior induced by atom-wall collision, effect of slow atoms in a thin atomic vapor film and Doppler-free configuration, sub-Doppler lines can be obtained in many cases. It is also found that TDNSR lines change periodically with the ratio of L/λ (L is the thickness of the atomic film and λ is the wavelength of the probe field). TDNSR disappears for L=2mλ/4 (m is an integer) and revives a typical dispersion shape for 2mλ/4 |
| Keywords: | spectroscopy selective reflection spectroscopy Dicke narrowing group-velocity reduction |
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