scholarly journals Multiple-Beams Splitter Based on Graphene

2016 ◽  
Vol 2016 ◽  
pp. 1-5
Author(s):  
Xiao Bing Li ◽  
Hong Ju Xu ◽  
Wei Bing Lu ◽  
Jian Wang
Keyword(s):  
Point Source ◽  
Surface Plasmon ◽  
Surface Plasmon Polariton ◽  
Graphene Layer ◽  
Multiple Beams ◽  
Circular Surface ◽  
Plasmon Polariton ◽  
Simulation Results ◽  
Operation Frequency ◽  
Epsilon Near Zero

Due to its tunability of conductivity, graphene can be considered as a novel epsilon-near-zero (ENZ) material. Based on this property, we propose a wave splitter using graphene. Simulation results show that the circular surface plasmon polariton waves excited by a point source can be transferred to narrow beams through a graphene-based wave splitter, which is formed by a polygonal contour of the ENZ graphene layer. The number of beams can be easily controlled by adjusting the shape of the polygonal ENZ graphene layer, and the operation frequency can also be chosen.

scholarly journals Structural dispersion–based reduction of loss in epsilon-near-zero and surface plasmon polariton waves

2019 ◽  
Vol 5 (10) ◽  
pp. eaav3764 ◽  
Author(s):  
Yue Li ◽  
Iñigo Liberal ◽  
Nader Engheta
Keyword(s):  
Wave Propagation ◽  
Surface Plasmon ◽  
Surface Plasmon Polariton ◽  
Negative Permittivity ◽  
Practical Implementation ◽  
Low Loss ◽  
Structural Dispersion ◽  
Plasmon Polariton ◽  
Infrared Frequencies ◽  
Epsilon Near Zero

The field of plasmonics has substantially affected the study of light-matter interactions at the subwavelength scale. However, dissipation losses still remain an inevitable obstacle in the development of plasmonic-based wave propagation. Although different materials with moderate losses are being extensively studied, absorption arguably continues to be the key challenge in the field. Here, we theoretically and numerically investigate a different route toward the reduction of loss in propagating plasmon waves. Rather than focusing on a material-based approach, we take advantage of structural dispersion in waveguides to manipulate effective material parameters, thus leading to smaller losses. The potential of this approach is illustrated with two examples: plane-wave propagation within a bulk epsilon-near-zero medium and surface plasmon polariton propagation at the interface of a medium with negative permittivity. We provide the recipe for a practical implementation at mid-infrared frequencies. Our results might represent an important step toward the development of low-loss plasmonic technologies.

scholarly journals Lasing at the nanoscale: coherent emission of surface plasmons by an electrically driven nanolaser

Nanophotonics ◽  
2020 ◽  
Vol 9 (12) ◽  
pp. 3965-3975 ◽  
Author(s):  
Dmitry Yu. Fedyanin ◽  
Alexey V. Krasavin ◽  
Aleksey V. Arsenin ◽  
Anatoly V. Zayats
Keyword(s):  
Data Storage ◽  
Surface Plasmon ◽  
Single Molecule ◽  
Optical Communication ◽  
Surface Plasmon Polariton ◽  
High Energy ◽  
Photonic Devices ◽  
Sensing Applications ◽  
Diverse Application ◽  
Plasmon Polariton

AbstractPlasmonics offers a unique opportunity to break the diffraction limit of light and bring photonic devices to the nanoscale. As the most prominent example, an integrated nanolaser is a key to truly nanoscale photonic circuits required for optical communication, sensing applications and high-density data storage. Here, we develop a concept of an electrically driven subwavelength surface-plasmon-polariton nanolaser, which is based on a novel amplification scheme, with all linear dimensions smaller than the operational free-space wavelength λ and a mode volume of under λ3/30. The proposed pumping approach is based on a double-heterostructure tunneling Schottky barrier diode and gives the possibility to reduce the physical size of the device and ensure in-plane emission so that the nanolaser output can be naturally coupled to a plasmonic or nanophotonic waveguide circuitry. With the high energy efficiency (8% at 300 K and 37% at 150 K), the output power of up to 100 μW and the ability to operate at room temperature, the proposed surface plasmon polariton nanolaser opens up new avenues in diverse application areas, ranging from ultrawideband optical communication on a chip to low-power nonlinear photonics, coherent nanospectroscopy, and single-molecule biosensing.

scholarly journals Surface plasmon polariton–enhanced photoluminescence of monolayer MoS2 on suspended periodic metallic structures

Nanophotonics ◽  
2020 ◽  
Vol 10 (2) ◽  
pp. 975-982
Author(s):  
Huanhuan Su ◽  
Shan Wu ◽  
Yuhan Yang ◽  
Qing Leng ◽  
Lei Huang ◽  
...  
Keyword(s):  
Surface Plasmon ◽  
Surface Plasmon Polariton ◽  
Plasmonic Nanostructures ◽  
Metallic Nanoparticle ◽  
Systematic Analysis ◽  
Excitation Rate ◽  
Matter Interaction ◽  
Light Matter Interaction ◽  
Plasmon Polariton ◽  
Plasmonic Effects

AbstractPlasmonic nanostructures have garnered tremendous interest in enhanced light–matter interaction because of their unique capability of extreme field confinement in nanoscale, especially beneficial for boosting the photoluminescence (PL) signals of weak light–matter interaction materials such as transition metal dichalcogenides atomic crystals. Here we report the surface plasmon polariton (SPP)-assisted PL enhancement of MoS2 monolayer via a suspended periodic metallic (SPM) structure. Without involving metallic nanoparticle–based plasmonic geometries, the SPM structure can enable more than two orders of magnitude PL enhancement. Systematic analysis unravels the underlying physics of the pronounced enhancement to two primary plasmonic effects: concentrated local field of SPP enabled excitation rate increment (45.2) as well as the quantum yield amplification (5.4 times) by the SPM nanostructure, overwhelming most of the nanoparticle-based geometries reported thus far. Our results provide a powerful way to boost two-dimensional exciton emission by plasmonic effects which may shed light on the on-chip photonic integration of 2D materials.

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