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Single-Nanoparticle Plasmonic Electro-optic Modulator Based on MoS 2 Monolayers.
- Source :
-
ACS nano [ACS Nano] 2017 Oct 24; Vol. 11 (10), pp. 9720-9727. Date of Electronic Publication: 2017 Sep 07. - Publication Year :
- 2017
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Abstract
- The manipulation of light in an integrated circuit is crucial for the development of high-speed electro-optic devices. Recently, molybdenum disulfide (MoS <subscript>2</subscript> ) monolayers generated broad interest for the optoelectronics because of their huge exciton binding energy, tunable optical emission, direct electronic band-gap structure, etc. Miniaturization and multifunctionality of electro-optic devices further require the manipulation of light-matter interaction at the single-nanoparticle level. The strong exciton-plasmon interaction that is generated between the MoS <subscript>2</subscript> monolayers and metallic nanostructures may be a possible solution for compact electro-optic devices at the nanoscale. Here, we demonstrate a nanoplasmonic modulator in the visible spectral region by combining the MoS <subscript>2</subscript> monolayers with a single Au nanodisk. The narrow MoS <subscript>2</subscript> excitons coupled with broad Au plasmons result in a deep Fano resonance, which can be switched on and off by applying different gate voltages on the MoS <subscript>2</subscript> monolayers. A reversible display device that is based on this single-nanoparticle modulator is demonstrated with a heptamer pattern that is actively controlled by the external gates. Our work provides a potential application for electro-optic modulation on the nanoscale and promotes the development of gate-tunable nanoplasmonic devices in the future.
Details
- Language :
- English
- ISSN :
- 1936-086X
- Volume :
- 11
- Issue :
- 10
- Database :
- MEDLINE
- Journal :
- ACS nano
- Publication Type :
- Academic Journal
- Accession number :
- 28863263
- Full Text :
- https://doi.org/10.1021/acsnano.7b05479