Full Characterization of a Molecular Cooper Minimum Using High-Harmonic Spectroscopy

Scarborough, Timothy D.; Gorman, Timothy T.; Mauger, François; Sándor, Péter; Khatri, Sanjay; Gaarde, Mette B.; Schafer, Kenneth J.; Agostini, Pierre; DiMauro, Louis F.

doi:10.3390/app8071129

Full Characterization of a Molecular Cooper Minimum Using High-Harmonic Spectroscopy

Journal Article · Thu Jul 12 00:00:00 EDT 2018 · Applied Sciences

DOI:https://doi.org/10.3390/app8071129· OSTI ID:2371736

Scarborough, Timothy D.; Gorman, Timothy T.; ; Sándor, Péter; Khatri, Sanjay; Gaarde, Mette B.; Schafer, Kenneth J.; Agostini, Pierre; DiMauro, Louis F.

High-harmonic generation was used to probe the spectral intensity and phase of the recombination-dipole matrix element of methyl chloride (CH3Cl), revealing a Cooper minimum (CM) analogous to the 3p CM previously reported in argon. The CM structure altered the spectral response and group delay (GD) of the emitted harmonics, and was revealed only through careful removal of all additional contributors to the GD. In characterizing the GD dispersion, also known as the “attochirp” we additionally present the most complete validation to date of the commonly used strong-field approximation for calculating the GD, demonstrating the correct intensity scaling and extending its usefulness to simple molecules.

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Research Organization:: Louisiana State Univ., Baton Rouge, LA (United States)

Sponsoring Organization:: USDOE; USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)

Grant/Contract Number:: SC0012462

OSTI ID:: 2371736

Alternate ID(s):: OSTI ID: 1501834

Journal Information:: Applied Sciences, Journal Name: Applied Sciences Journal Issue: 7 Vol. 8; ISSN ASPCC7; ISSN 2076-3417

Publisher:: MDPI AGCopyright Statement

Country of Publication:: Switzerland

Language:: English

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