表面等离激元晶体抑制88 Sr光钟中的黑体辐射频移

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112.6 mHz,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 re-duce 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 88 Sr 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.