Doppler-free multiphoton absorption in i
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David L. Andrews; Kevin P. Hopkins
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Article
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1988
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Elsevier Science
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English
⚖ 398 KB
It is shown that with counter-propagating laser beams of identical circular polarisation, symmetry-preserving transitions in icosahedral molecules produce totally Doppler-free lines in two-photon and four-photon absorption spectra. In the four-photon case, this feature cannot occur for molecules of