Localized plasmonic fields of nanoantennas enhance second harmonic generation from two-dimensional molybdenum disulfide | Zendy

Gregory T. Forcherio | Zendy; Luigi Bonacina | Zendy; JeanPierre Wolf | Zendy; D. Keith Roper | Zendy

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Localized plasmonic fields of nanoantennas enhance second harmonic generation from two-dimensional molybdenum disulfide

Author(s) -

Gregory T. Forcherio,

Luigi Bonacina,

JeanPierre Wolf,

D. Keith Roper

Publication year - 2018

Publication title -

mrs communications

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.751

H-Index - 31

eISSN - 2159-6859

pISSN - 2159-6867

DOI - 10.1557/mrc.2018.133

Subject(s) - materials science , plasmon , molybdenum disulfide , second harmonic generation , dipole , discrete dipole approximation , monolayer , dimer , optoelectronics , molecular physics , molybdenum , nanoshell , scattering , optics , nanotechnology , nuclear magnetic resonance , chemistry , metallurgy , laser , physics , organic chemistry

Frequency-dependence and magnitude of second harmonic generation (SHG) from ~4 × 105 nm2 molybdenum disulfide (MoS2) monolayers was examined in presence of single 150 nm plasmonic gold@silica shell@core nanoantenna monomer and dimers. Quantitative agreement between discrete dipole approximation-calculated fields and measured SHG enhancements was found. SHG from MoS2 was enhanced up to 1.88 × upon deposition of a plasmonic nanoantenna-dimer with 170 nm gap, reaching maximal normalized SHG conversion efficiency of 0.0250%/W. Pump losses attributable to plasmonic damping, e.g., scattering and/or hot-electron injection into MoS2, were apparent. Linear and nonlinear optical activity of MoS2 and nanoantenna controls were compared with literature values.

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