表面等离激元晶体抑制^(88)Sr光钟中的黑体辐射频移  

Restraining the Black Body shift of ^(88)Sr optical clocks by a Surface Plasmon Crystal

作　　者：任铁未[1,2] 常宏[2] 张首刚[2] 王前进[3] 朱永元[3] 祝世宁[3] 

机构地区：[1]黄冈师范学院数理学院,湖北黄州438000 [2]中国科学院国家授时中心时间频率基准重点实验室,陕西西安710600 [3]南京大学固体微结构国家实验室,江苏南京210093

出　　处：《黄冈师范学院学报》2014年第6期41-44,共4页Journal of Huanggang Normal University

基　　金：湖北省教育厅青年基金项目(08BQ102);黄冈师范学院校级重点学科项目(zdxkwl201404)

摘　　要：在锶原子光晶格钟中,黑体辐射效应对光钟的频率不确定度影响最为显著。利用表面等离激元晶体的滤波特性,屏蔽大部分黑体辐射能量,可以显著减少相应频移量及其涨落。通过对设计器件透射谱的分析可以测算,经滤波后的黑体辐射剩余能量约为初始能量的4.8%,则锶光钟的黑体辐射频移可减小至112.6mHz,相应不确定度约为3.6×10-18。The Black Body Radiation affects the uncertainty of the frequency of an optical clock most seriously. It can reduce the Black Body shift and its fluctuation to shield the main part of its energy by the Surface Plasmon Crystals. The transmission of this kind of filter was researched theoretically and experimentally. Then the conclusion could be obtained that the energy of the Black Body into 88Sr optical clocks is possible to be restrained to 4.8% of the original quantity, the corresponding shift and its uncertainty are reduced to 112.6mHz and 3.6× 10^-18 , respectively.

关 键 词：超冷原子 光钟 黑体辐射 等离激元 

分 类 号：O431[机械工程—光学工程]