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

Nathan Spear; Kent Hallman; Amanda Wistuba; Wenze Tan; Janet Macdonald; Richard F. Haglund Jr.

doi:10.1117/12.2546674

10 March 2020 Harmonic generation in bilayer nanoparticle films enhanced by plasmon-plasmon coupling (Conference Presentation)

Nathan Spear, Kent Hallman, Amanda Wistuba, Wenze Tan, Janet Macdonald, Richard F. Haglund Jr.

Author Affiliations +

Proceedings Volume 11278, Ultrafast Phenomena and Nanophotonics XXIV; 1127813 (2020) https://doi.org/10.1117/12.2546674
Event: SPIE OPTO, 2020, San Francisco, California, United States

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.

Conference Presentation

Citation Download Citation

Nathan Spear, Kent Hallman, Amanda Wistuba, Wenze Tan, Janet Macdonald, and Richard F. Haglund Jr. "Harmonic generation in bilayer nanoparticle films enhanced by plasmon-plasmon coupling (Conference Presentation)", Proc. SPIE 11278, Ultrafast Phenomena and Nanophotonics XXIV, 1127813 (10 March 2020); https://doi.org/10.1117/12.2546674

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