论文标题
由于干扰了遥远的过渡，类似Fano的谐振
Fano-like resonance due to interference with distant transitions
论文作者
论文摘要
原子或分子的狭窄光学共振在各种精确测量中具有巨大的显着性，例如测试基本物理和一级频率标准的产生。在这些研究中，需要从拟合测得的光谱中得出的准确过渡中心，这在非常依赖于光谱线曲线的知识。在这里，我们提出了一种由原子或分子中遥远的离散水平％％％诱导的Fano样共振的新机制，并通过无多普勒的振动 - 振动旋转转变的Co $ _2 $的振动 - 旋转转变进行实验验证。观察到的光谱具有不对称的轮廓，其幅度随探针激光功率四倍地增加。我们的结果促进了基于狭窄过渡的广泛主题。 ％，例如光学时钟，基本物理常数的确定和量子记忆。
Narrow optical resonances of atoms or molecules have immense significance in various precision measurements, such as testing fundamental physics and the generation of primary frequency standards. In these studies, accurate transition centers derived from fitting the measured spectra are demanded, which critically rely on the knowledge of spectral line profiles. Here, we propose a new mechanism of Fano-like resonance induced by distant discrete levels %in atoms or molecules and experimentally verify it with Doppler-free spectroscopy of vibration-rotational transitions of CO$_2$. The observed spectrum has an asymmetric profile and its amplitude increases quadratically with the probe laser power. Our results facilitate a broad range of topics based on narrow transitions. %, such as optical clocks, determination of fundamental physical constants, and quantum memory.
