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

Published inMRS Communications
Publication date2018
Abstract

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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Citation (ISO format)
FORCHERIO, Gregory T. et al. Localized plasmonic fields of nanoantennas enhance second harmonic generation from two-dimensional molybdenum disulfide. In: MRS Communications, 2018. doi: 10.1557/mrc.2018.133
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ISSN of the journal2159-6859
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Creation09/19/2018 8:47:00 AM
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