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lattice plasmon induced large enhancement of excitonic emission in monolayer metal dichalcogenides
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نویسنده
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taghinejad hossein ,shams-mousavi s. hamed ,gong yongji ,taghinejad mohammad ,eftekhar ali a. ,ajayan pulickel ,adibi ali
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منبع
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plasmonics - 2017 - دوره : 12 - شماره : 6 - صفحه:1975 -1981
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چکیده
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Through the integration of a strongly coupled plasmonic nanoantenna array with a monolayer mose2, spatial maps of the photoluminescence (pl) are acquired on- and off-resonance to exhibit the role of the lattice plasmon modes on the enhancement of the pl from the mose2 monolayer. the on-resonance excitation of the hybrid nanostructure at 785 nm reveals a significant pl enhancement of more than 25 (compared to the pl enhancement factor that a fabry-perot resonance provides), while the off-resonance excitation at 488 nm only results in an enhancement factor of five. polarization-resolved optical reflection spectroscopy is also experimented to verify the role of the coupled nanoantenna array on the pl enhancement. full-wave numerical simulations of the complete structure are also performed to support the observed experimental results. these findings enrich our knowledge regarding the light interaction with 2d materials mediated by plasmonic nanostructures and pave the way for the design of a new class of hybrid 2d material plasmonic devices that utilize enhanced light-matter interaction.
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کلیدواژه
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lattice plasmon ,photoluminescence ,2d-material ,plasmonic nanoantenna ,transition metal dichalcogenides
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آدرس
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georgia institute of technology, school of electrical and computer engineering, usa, georgia institute of technology, school of electrical and computer engineering, usa, rice university, department of material science and nano engineering, usa, georgia institute of technology, school of electrical and computer engineering, usa, georgia institute of technology, school of electrical and computer engineering, usa, rice university, department of material science and nano engineering, usa, georgia institute of technology, school of electrical and computer engineering, usa
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Authors
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