Bond-breaking and adsorption of molecules at plasmonic hot-spots initiated by infrared vibrational excitation

Ikki Morichika; Satoshi Ashihara

doi:10.1117/12.2573772

15 June 2020 Bond-breaking and adsorption of molecules at plasmonic hot-spots initiated by infrared vibrational excitation

Ikki Morichika, Satoshi Ashihara

Author Affiliations +

Proceedings Volume 11522, Optical Manipulation and Structured Materials Conference 2020; 115221D (2020) https://doi.org/10.1117/12.2573772
Event: SPIE Technologies and Applications of Structured Light, 2020, Yokohama, Japan

Abstract

We demonstrate that metal-carbonyl compounds in liquid n-hexane are dissociated and adsorbed on gold surfaces upon vibrational excitation. We illuminate gold nanoantennas with temporally-shaped mid-infrared pulses to produce intense plasmonic near-fields. The produced near-fields induce vibrational ladder climbing and the resultant dissociation of metal-carbonyl compounds. A new band, cumulatively increase with irradiation, is attributed to the molecular species which are dissociated and adsorbed on gold surfaces. This demonstration proves that the plasmonic near-fields of midinfrared pulses are useful for mode-selective reaction control at electronic ground states and for possible subsequent manipulation of molecules like trapping and alignment.

Citation Download Citation

Ikki Morichika and Satoshi Ashihara "Bond-breaking and adsorption of molecules at plasmonic hot-spots initiated by infrared vibrational excitation", Proc. SPIE 11522, Optical Manipulation and Structured Materials Conference 2020, 115221D (15 June 2020); https://doi.org/10.1117/12.2573772

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