铟离子冷却用跃迁频率与同位素移动的精密测量  

Absolute frequency and isotope shift measurements of the cooling transition in singly ionized Indium

作　　者：王延辉[1,2] Dumke R 张洁 刘涛 Stejskal A 赵燕宁 陆泽晃 王力军[1,2] 董太乾[1] 

机构地区：[1]北京大学信息科学技术学院,量子电子学研究所,北京100871 [2]Max-Planck Research Group, Institute of Optics, Information and Photonics, Universitat Erlangen-Nuremberg, Erlangen, Germany 91058 [3]Nanyang Technological University, Singapore 637616

出　　处：《量子电子学报》2008年第2期129-134,共6页Chinese Journal of Quantum Electronics

摘　　要：利用囚禁在Paul型离子阱中的铟单离子和飞秒光频梳实现了铟离子5s^2 ~1S_0(F=9/2)-5s5p ~3p_1 (F=11/2)230.6nm冷却用跃迁频率的精密测量,准确度有超过两个量级的提高。一台基于半导体激光器的四倍频系统作为光源,飞秒激光光频梳作为光频测量的工具,它的参考源为一台铯原子钟。铟离子^(115)In^+与^(113)In^+的跃迁频率分别为1299648 954.54(10)MHz和1299649 585.36(16)MHz。该跃迁对应的纯同位素移动为630.82(19)MHz,考虑超精细相互作用后,同位素移动为695.76(1.68)MHz。Greater than two orders of magnitude improvements in the absolute frequency and isotope shift measurements of the In^＋ 5s^2 ^1S0 （F=9/2） - 5s5p ^3P1 （F=11/2） transition near 230.6 nm are reperted. The fourth-harmonic of a semiconductor laser is used as the light source. The absolute frequency is measured with the help of a frequency comb referenced to a Cs atomic clock. The resulting transition frequencies for isotopes ^115In^＋ and ^113In^＋ are measured to be 1 299 648 954.54（10） MHz and 1 299 649 585.36（16） MHz, respectively. The deduced cooling transition frequency difference is 630.82（19） MHz. The isotope shift is calculated to be 695.76（1.68） MHz.

关 键 词：光谱学 同位素移动 光频测量 单离子 

分 类 号：O433[机械工程—光学工程] TH714.1[理学—光学]