Vibrational sum frequency generation spectroscopy using inverted visible pulses | Zendy

Champika Weeraman | Zendy; S. A. Mitchell | Zendy; Rune Lausten | Zendy; Linda J. Johnston | Zendy; Albert Stolow | Zendy

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Vibrational sum frequency generation spectroscopy using inverted visible pulses

Author(s) -

Champika Weeraman,

S. A. Mitchell,

Rune Lausten,

Linda J. Johnston,

Albert Stolow

Publication year - 2010

Publication title -

optics express

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.394

H-Index - 271

ISSN - 1094-4087

DOI - 10.1364/oe.18.011483

Subject(s) - sum frequency generation , optics , narrowband , materials science , second harmonic generation , spectroscopy , pulse (music) , ultrashort pulse , resolution (logic) , nonlinear optics , broadband , physics , laser , quantum mechanics , artificial intelligence , detector , computer science

We present a broadband vibrational sum frequency generation (BB-VSFG) scheme using a novel ps visible pulse shape. We generate the fs IR pulse via standard procedures and simultaneously generate an 'inverted' time-asymmetric narrowband ps visible pulse via second harmonic generation in the pump depletion regime using a very long nonlinear crystal which has high group velocity mismatch (LiNbO3). The 'inverted' ps pulse shape minimally samples the instantaneous nonresonant response but maximally samples the resonant response, maintaining high spectral resolution. We experimentally demonstrate this scheme, presenting SFG spectra of canonical organic monolayer systems in the C-H stretch region (2800-3000 cm(-1)).

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