Continuous Coherent Lyman-a Excitation of Atomic Hydrogen


The 1S-2P transition in atomic hydrogen has been observed for the first time with almost natural linewidth. We employ a unique source of continuous coherent Lyman-a radiation based on four-wave mixing in mercury. The output of the source has been improved 40-fold to yield 20 nW. This demonstration shows that laser cooling and detection with continuous Lyman-a radiation has excellent prospects for future experiments with antihydrogen.

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@inproceedings{Eikema2001ContinuousCL, title={Continuous Coherent Lyman-a Excitation of Atomic Hydrogen}, author={Kjeld S. E. Eikema and Joella Walz and Theodor W. H{\"a}nsch}, year={2001} }