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

Published online by Cambridge University Press:  26 July 2018

Gregory T. Forcherio Open the ORCID record for Gregory T. Forcherio [Opens in a new window] ,
Luigi Bonacina ,
Jean-Pierre Wolf  and
D. Keith Roper
Gregory T. Forcherio*
Affiliation:
MicroElectronics-Photonics Program, University of Arkansas, Fayetteville, AR 72701, USA Sensors & Electron Devices Directorate, U.S. Army Research Laboratory, Adelphi, MD 20783, USA
Luigi Bonacina
Affiliation:
Applied Physics Departement, Université de Genève, Genève 1211, Switzerland
Jean-Pierre Wolf
Affiliation:
Applied Physics Departement, Université de Genève, Genève 1211, Switzerland
D. Keith Roper
Affiliation:
MicroElectronics-Photonics Program, University of Arkansas, Fayetteville, AR 72701, USA Ralph E. Martin Department of Chemical Engineering, University of Arkansas, Fayetteville, AR 72701, USA
*
Address all correspondence to G. T. Forcherio at [email protected]
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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.

Type
Research Letters
Information
MRS Communications , Volume 8 , Issue 3 , September 2018 , pp. 1029 - 1036
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Copyright
Copyright © Materials Research Society 2018 

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