Phonon-assisted plasmon induced transparency in graphene nanostructures

Mahat, Meg; Rostovtsev, Yuri V.; Karna, Sanjay; Neogi, Arup

doi:10.1364/nlo.2017.nm2b.6

Cited by 1 publication

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“…Recently nano-plasmonic effects have proven to be an effective means for enhancing photocurrent generation [ 7 ] or absorption for sensing [ 8 ], tunable antennae [ 9 ], and tuning the wavelength of absorption and emission [ 10 ]. Metal nanoparticles hybridized with 2D materials or graphene can modulate the absorption of the quantized states [ 11 , 12 ] in these materials, leading to coherence effects due to light-matter interaction. The plasmonic properties of the nanoparticles can be tailored by the dielectric environment both within and outside the nanoparticles [ 13 ].…”

Section: Introductionmentioning

confidence: 99%

Plasmon-Induced Enhanced Light Emission and Ultrafast Carrier Dynamics in a Tunable Molybdenum Disulfide-Gallium Nitride Heterostructure

et al. 2022

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The effect of localized plasmon on the photoemission and absorption in hybrid molybdenum disulfide-Gallium nitride (MoS2-GaN) heterostructure has been studied. Localized plasmon induced by platinum nanoparticles was resonantly coupled to the bandedge states of GaN to enhance the UV emission from the hybrid semiconductor system. The presence of the platinum nanoparticles also increases the effective absorption and the transient gain of the excitonic absorption in MoS2. Localized plasmons were also resonantly coupled to the defect states of GaN and the exciton states using gold nanoparticles. The transfer of hot carriers from Au plasmons to the conduction band of MoS2 and the trapping of excited carriers in MoS2 within GaN defects results in transient plasmon-induced transparency at ~1.28 ps. Selective optical excitation of the specific resonances in the presence of the localized plasmons can be used to tune the absorption or emission properties of this layered 2D-3D semiconductor material system.

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