Coherent two-photon emission from hydrogen molecules excited by counter-propagating laser pulses
Coherent two-photon emission from hydrogen molecules excited by counter-propagating laser pulses
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DOI：
10.1088/1361-6455/aafbd0
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发表时间：
2018-06
期刊：
影响因子：
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通讯作者：
T. Hiraki;H. Hara;Y. Miyamoto;K. Imamura;T. Masuda;N. Sasao;S. Uetake;A. Yoshimi;K. Yoshimura;M. Yoshimura
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文献类型：
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作者：
T. Hiraki;H. Hara;Y. Miyamoto;K. Imamura;T. Masuda;N. Sasao;S. Uetake;A. Yoshimi;K. Yoshimura;M. Yoshimura
在对向传播激光脉冲相干激发下，我们观测到仲氢气体第一振动激发态的双光子发射信号。单个窄线宽激光源在仲氢分子的激发和TPE过程的诱导中起作用。我们测量了信号能量对失谐量、目标气体压力和输入脉冲能量的依赖性。这些结果与基于一维时空Maxwell-Bloch方程的数值模拟结果定性一致。对反向传播注入方案中TPE过程的研究是迈向中微子质谱学的重要一步。
We observed two-photon emission (TPE) signal from the first vibrationally excited state of parahydrogen gas coherently excited by counter-propagating laser pulses. A single narrow-linewidth laser source has roles in the excitation of the parahydrogen molecules and the induction of the TPE process. We measured dependences of the signal energy on the detuning, target gas pressure, and input pulse energies. These results are qualitatively consistent with those obtained by numerical simulations based on Maxwell–Bloch equations with one spatial dimension and one temporal dimension. This study of the TPE process in the counter-propagating injection scheme is an important step toward neutrino mass spectroscopy.