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Proceedings Paper

Harmonic generation in bilayer nanoparticle films enhanced by plasmon-plasmon coupling (Conference Presentation)

Paper Abstract

We describe the generation of second harmonic light (525 nm) from femtosecond near-infrared (NIR, 1050 nm) pulses from three nanoparticle films: gold nanospheres, hexagonal nanodisks of covellite (CuS), and a bilayer comprising covellite and gold films. Enhanced second-harmonic generation (SHG), fourth order in the NIR pump intensity, arises from coupling of plasmon resonance modes of CuS and Au. Above 6 GW/cm2, the enhanced SHG from the bilayer film is much larger than the incoherent sum of SHG from the Au and CuS films separately, and the SHG efficiency of the bilayer (Au:CuS) films is nine times larger than that of BBO per unit thickness.

Paper Details

Date Published: 10 March 2020
Proc. SPIE 11278, Ultrafast Phenomena and Nanophotonics XXIV, 1127813 (10 March 2020); doi: 10.1117/12.2546674
Show Author Affiliations
Nathan Spear, Vanderbilt Univ. (United States)
Kent Hallman, Vanderbilt Univ. (United States)
Amanda Wistuba, Northwest Missouri State Univ. (United States)
Wenze Tan, Vanderbilt Univ. (United States)
Janet Macdonald, Vanderbilt Univ. (United States)
Richard F. Haglund Jr., Vanderbilt Univ. (United States)

Published in SPIE Proceedings Vol. 11278:
Ultrafast Phenomena and Nanophotonics XXIV
Markus Betz; Abdulhakem Y. Elezzabi, Editor(s)

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