Abstract:
:Modulation of photoluminescence of atomically thin transition metal dichalcogenide two-dimensional materials is critical for their integration in optoelectronic and photonic device applications. By coupling with different plasmonic array geometries, we have shown that the photoluminescence intensity can be enhanced and quenched in comparison with pristine monolayer MoS2. The enhanced exciton emission intensity can be further tuned by varying the angle of polarized incident excitation. Through controlled variation of the structural parameters of the plasmonic array in our experiment, we demonstrate modulation of the photoluminescence intensity from nearly fourfold quenching to approximately threefold enhancement. Our data indicates that the plasmonic resonance couples to optical fields at both, excitation and emission bands, and increases the spontaneous emission rate in a double spacing plasmonic array structure as compared with an equal spacing array structure. Furthermore our experimental results are supported by numerical as well as full electromagnetic wave simulations. This study can facilitate the incorporation of plasmon-enhanced transition metal dichalcogenide structures in photodetector, sensor and light emitter applications.
journal_name
Sci Repjournal_title
Scientific reportsauthors
Mukherjee B,Kaushik N,Tripathi RP,Joseph AM,Mohapatra PK,Dhar S,Singh BP,Kumar GV,Simsek E,Lodha Sdoi
10.1038/srep41175subject
Has Abstractpub_date
2017-01-30 00:00:00pages
41175issn
2045-2322pii
srep41175journal_volume
7pub_type
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