Resonance-enhanced sum-frequency generation of XUV radiation in CO
1990; Elsevier BV; Volume: 165; Issue: 6 Linguagem: Inglês
10.1016/0009-2614(90)87026-n
ISSN1873-4448
Autores Tópico(s)Photochemistry and Electron Transfer Studies
ResumoAbstract Resonance-enhanced sum-frequency generation of XUV radiation is observed for the first time in a molecular gas. Two laser frequencies are mixed in a pulsed free jet of carbon monoxide. The first laser is two-photon resonant with the Q-branch of the C1Σ+-X1Σ+ transition, while the second laser is tuned so that the sum frequency 2ν1 + ν2 is also resonant with various Rydberg state transitions in the range 107070-109310 cm−1. A spectrum is obtained by monitoring the sum-frequency intensity versus the frequency of the second laser. Rotational constants are obtained for four states and the intensity profiles show some remarkable effects of competition between four-wave mixing and reabsorption of the sum frequency.
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