Experimental research on loading strontium bosons into the optical lattice operating at the \magic\ wavelength

NTSC-IR

	Experimental research on loading strontium bosons into the optical lattice operating at the \magic\ wavelength
	Tian Xiao 1; Wang YeBing 1; Lu BenQuan 1; Liu Hui 1; Xu QinFang 1; Ren Jie 1; Yin MoJuan 1; Kong DeHuan 1; Chang Hong1 ; Zhang ShouGang1
	2015
发表期刊	ACTA PHYSICA SINICA
ISSN	1000-3290
卷号	64 期号:13
摘要	The optical lattice clock with neutral atoms occupies an outstanding position in the research field of atomic clocks, demonstrating the great potential of its performance (like the uncertainty and the stability). At present, the optical lattice clock has realized a 10(-18) level of its uncertainty. In this paper, we present the realization of loading bosonic atoms Sr-88 (strontium, alkaline-earth metals) into a one-dimensional (1D) optical lattice in our laboratory. The optical lattice where the atoms are trapped can make the energy level shift, called Stark shift. But there is the special optical lattice operating at the "magic" wavelength for clock transitions (5s(2)) S-1(0) (5s5p) P-3(0), which can make the same Stark light-shift for both of them, indicating a zero light-shift relative to the clock. In our experiment, Sr atoms are cooled in a two-stage cooling and its temperature can be as low as 2 mu K. Then these cold atoms are confined in the Lamb-Dicke region by the lattice laser output from an amplified diode laser operating at the "magic" wavelength, 813 nm. Experimentally, it is straightforward to provide 850 mW of lattice power focused to a 38 mu m beam radius. After the cold atoms have trapped in the optical lattice, the lifetime of atoms in 1D optical lattice is measured to be 270 ms. The temperature and the number are about 3.5 mu K and 1.2 x 10(5) respectively. Besides, effects of the power of the lattice laser on both the number and temperature are analyzed. The number changes linearly with the laser power, while there is no obvious influence on the temperature by the power. This original and special approach for atoms trapped in the optical lattice can provide a long interrogation time for probing the clock transition. Furthermore, it may be the foundation for developing our optical lattice clock of strontium atoms.
关键词	CLOCK FREQUENCY ACCURACY optical clock cold atoms magic wavelength optical lattice
语种	英语
资助项目	[National Natural Science Foundation of China]
文献类型	期刊论文
条目标识符	http://210.72.145.45/handle/361003/13116
专题	中国科学院国家授时中心
作者单位	1.中国科学院国家授时中心 2.中国科学院大学
第一作者单位	中国科学院国家授时中心
推荐引用方式 GB/T 7714	Tian Xiao,Wang YeBing,Lu BenQuan,et al. Experimental research on loading strontium bosons into the optical lattice operating at the \magic\ wavelength[J]. ACTA PHYSICA SINICA,2015,64(13).
APA	Tian Xiao.,Wang YeBing.,Lu BenQuan.,Liu Hui.,Xu QinFang.,...&Zhang ShouGang.(2015).Experimental research on loading strontium bosons into the optical lattice operating at the \magic\ wavelength.ACTA PHYSICA SINICA,64(13).
MLA	Tian Xiao,et al."Experimental research on loading strontium bosons into the optical lattice operating at the \magic\ wavelength".ACTA PHYSICA SINICA 64.13(2015).