Axis-dependence of molecular high harmonic emission in three dimensions
| Autor: | Todd J. Martínez, Limor S. Spector, S. Miyabe, Philip H. Bucksbaum, Markus Guehr, Tamar Seideman, Maxim Artamonov |
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| Rok vydání: | 2013 |
| Předmět: |
Physics
Multidisciplinary business.industry General Physics and Astronomy Linear molecular geometry General Chemistry Molecular physics General Biochemistry Genetics and Molecular Biology Spectral line Optics Harmonic High harmonic generation Rotational spectroscopy Transient (oscillation) business Spectroscopy Principal axis theorem |
| Zdroj: | Nature communications. 5 |
| ISSN: | 2041-1723 |
| Popis: | High-order harmonic generation in an atomic or molecular gas is a promising source of sub-femtosecond vacuum ultraviolet coherent radiation for transient scattering, absorption, metrology and imaging applications. High harmonic spectra are sensitive to Angstrom-scale structure and motion of laser-driven molecules, but interference from radiation produced by random molecular orientations obscures this in all but the simplest cases, such as linear molecules. Here we show how to extract full body-frame high harmonic generation information for molecules with more complicated geometries by utilizing the methods of coherent transient rotational spectroscopy. To demonstrate this approach, we obtain the relative strength of harmonic emission along the three principal axes in the asymmetric-top sulphur dioxide. This greatly simplifies the analysis task of high harmonic spectroscopy and extends its usefulness to more complex molecules. |
| Databáze: | OpenAIRE |
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