Hirakawa Y, Nagai A, Muraoka K, Okada T, Maeda M
Opt Lett. 1993 May 1;18(9):735-7. doi: 10.1364/ol.18.000735.
Tunable coherent extreme-ultraviolet (XUV) radiation at wavelengths as low as 66.86 nm was generated by two-photon resonant four-wave mixing in a hydrogen molecular gas jet. In this investigation, an ArF excimer laser was tuned to the E,F(1)Sigma(+)(g)(upsilon' = 6)-X(1)Sigma(+)(g)(upsilon' = 0) Q(1) transition of H(2), and the second-harmonic radiation of a dye laser was mixed to obtain the resultant XUV radiation. To our knowledge, this tunable XUV radiation is the shortest wavelength obtained so far by two-photon resonant four-wave mixing.
在氢气分子气体喷流中，通过双光子共振四波混频产生了波长低至66.86纳米的可调谐相干极紫外（XUV）辐射。在本研究中，将一台ArF准分子激光器调谐至H₂的E,F(1)Σ⁺(g)(υ' = 6)-X(1)Σ⁺(g)(υ' = 0) Q(1)跃迁，并将染料激光器的二次谐波辐射进行混频，从而获得了合成的XUV辐射。据我们所知，这种可调谐XUV辐射是迄今为止通过双光子共振四波混频获得的最短波长。
