title: Split Hole Resonator: A Nanoscale UV Light Source.
abstract: Because of strong light absorption by metals, it is believed that plasmonic nanostructures cannot be used for generating intensive radiation harmonics in the ultraviolet (UV) spectral range. This work presents results of investigation of nonlinear optical interaction with a single gold nanostructure, the split-hole resonator (SHR) under the state-of-the-art experimentally realized conditions. To realize interaction with all spectral components of a 6 fs laser pulse several multipole plasmon resonances were simultaneously excited in the SHR nanostructure. To the best of our knowledge, this paper reports for the first time a strong nonlinear optical interaction at the frequencies of these resonances that leads to (i) the second harmonic generation, (ii) the third harmonic generation (THG), and (iii) the light generation at mixed frequencies. The THG near field amplitude reaches 0.6% of the fundamental frequency field amplitude, which enables the creation of UV radiation sources with a record high intensity. The UV THG may find many important applications including biomedical ones (such as cancer therapy).
authors.affiliation: Institute for Spectroscopy Russian Academy of Sciences , Phizicheskaya str., 5, Troitsk, Moscow, 142190 Russia.|Institute on Laser and Information Technologies of the Russian Academy of Sciences , Moscow, Troitsk, 142190, Russia.
authors.forename: Pavel N
authors.initials: PN
authors.lastname: Melentiev
authors.affiliation: Institute for Spectroscopy Russian Academy of Sciences , Phizicheskaya str., 5, Troitsk, Moscow, 142190 Russia.
authors.forename: Anton E
authors.initials: AE
authors.lastname: Afanasiev
authors.affiliation: Institute for Spectroscopy Russian Academy of Sciences , Phizicheskaya str., 5, Troitsk, Moscow, 142190 Russia.|Moscow Institute of Physics and Technology , Moscow reg., Dolgoprudny, 141700, Russia.
authors.forename: Arthur A
authors.initials: AA
authors.lastname: Kuzin
authors.affiliation: Institute for Spectroscopy Russian Academy of Sciences , Phizicheskaya str., 5, Troitsk, Moscow, 142190 Russia.
authors.forename: Valeriy M
authors.initials: VM
authors.lastname: Gusev
authors.affiliation: Institute for Spectroscopy Russian Academy of Sciences , Phizicheskaya str., 5, Troitsk, Moscow, 142190 Russia.
authors.forename: Oleg N
authors.initials: ON
authors.lastname: Kompanets
authors.affiliation: The University of Texas Medical Branch , 301 University Boulevard, Galveston, Texas 77555, United States.
authors.forename: Rinat O
authors.initials: RO
authors.lastname: Esenaliev
authors.affiliation: Institute for Spectroscopy Russian Academy of Sciences , Phizicheskaya str., 5, Troitsk, Moscow, 142190 Russia.|Institute on Laser and Information Technologies of the Russian Academy of Sciences , Moscow, Troitsk, 142190, Russia.
authors.forename: Victor I
authors.initials: VI
authors.lastname: Balykin
keywords: Plasmonics; UV radiation; nanoantennas; nonlinear optics; second-harmonic generation; third-harmonic generation