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.

The anisotropic broadband surface plasmon polariton and hot carrier properties of borophene monolayer

Nanophotonics ◽  
2022 ◽  
Vol 0 (0) ◽  
Author(s):  
Chaochao Jian ◽  
Xiangchao Ma ◽  
Jianqi Zhang ◽  
Jiali Jiang
Keyword(s):  
Transport Properties ◽  
Surface Plasmon ◽  
Surface Plasmon Polariton ◽  
Hot Carriers ◽  
Low Loss ◽  
Typical Application ◽  
Carrier Lifetimes ◽  
Photocatalytic Reactors ◽  
Plasmon Polariton ◽  
Energy And Momentum

Abstract Borophene monolayer with its intrinsic metallic and anisotropic band structures exhibits extraordinary electronic, optical, and transport properties. Especially, the high density of Dirac electrons enables promising applications for building low-loss broadband SPP devices. However, a systematic characterization of the surface plasmon polariton (SPP) properties and hot carriers generated from the inevitable SPP decay in borophene has not been reported so far. Most importantly, the mechanism for SPP losses remains obscurely quantified. In this work, from a fully first-principles perspective, we explicitly evaluate the main loss effects of SPP in borophene, including the Drude resistance, phonon-assisted intraband and direct interband electronic transitions. With this knowledge, we further calculate the frequency- and polarization-dependent SPP response of borophene, and evaluate some typical application-dependent figure of merits of SPP. On the other hand, we evaluate the generation and transport properties of plasmon-driven hot carriers in borophene, involving energy- and momentum-dependent carrier lifetimes and mean free paths, which provide deeper insight toward the transport of hot carriers at the nanoscale. These results indicate that borophene has promising applications in next-generation low-loss optoelectronic devices and photocatalytic reactors.

scholarly journals High-performance and compact broadband terahertz plasmonic waveguide intersection

Nanophotonics ◽  
2019 ◽  
Vol 8 (10) ◽  
pp. 1811-1819 ◽  
Author(s):  
Mingrui Yuan ◽  
Yanfeng Li ◽  
Yongchang Lu ◽  
Ying Zhang ◽  
Ziying Zhang ◽  
...  
Keyword(s):  
Surface Plasmon ◽  
High Performance ◽  
Surface Plasmon Polariton ◽  
Broad Band ◽  
Plasmonic Waveguide ◽  
Integrated Systems ◽  
Low Loss ◽  
Wide Range ◽  
Plasmon Polariton ◽  
New Applications

AbstractFor terahertz (THz) integrated systems, an intersection between waveguides is inevitable and is often accompanied by considerable crosstalk and loss. Here, we propose and experimentally demonstrate a novel type of crossing with a footprint less than 0.2 × 0.2 mm2 for THz surface plasmon polariton waveguiding. With an optimized crossover structure, the measured loss of the intersection is as low as 0.89 dB/crossing, and the crosstalk is less than −19.06 dB/crossing at 0.55 THz. The proposed crossing structure is compact and has low loss and crosstalk within a broad band, which will pave the way for a wide range of new applications for THz integrated systems.

scholarly journals Bulk and surface plasmon polariton excitation in RuO_2 for low-loss plasmonic applications in NIR

2012 ◽  
Vol 20 (8) ◽  
pp. 8618 ◽  
Author(s):  
L. Wang ◽  
C. Clavero ◽  
K. Yang ◽  
E. Radue ◽  
M. T. Simons ◽  
...  
Keyword(s):  
Surface Plasmon ◽  
Surface Plasmon Polariton ◽  
Low Loss ◽  
Plasmon Polariton

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 Compact Optical Waveguides Based on Hybrid Index and Surface-Plasmon-Polariton Guidance Mechanisms

2007 ◽  
Vol 2007 ◽  
pp. 1-7 ◽  
Author(s):  
Min Yan ◽  
Min Qiu
Keyword(s):  
Surface Plasmon ◽  
Optical Waveguides ◽  
Surface Plasmon Polariton ◽  
Field Size ◽  
Hybrid Index ◽  
Dielectric Waveguides ◽  
Low Loss ◽  
Mode Field ◽  
Telecommunication Wavelength ◽  
Plasmon Polariton

Surface-plasmon-polariton (SPP) waveguides made of materials available in nature have, in general, been found to suffer from very high absorption loss when light confinement is beyond diffraction limit. In this paper, the possibility of combining both the conventional index-guiding and the SPP-guiding mechanisms together into one single waveguide is being explored. Such waveguides, expectedly, inherent the low-loss feature of all-dielectric waveguides as well as the superior mode field confinement possessed by SPP waveguides. By using experimentally ready materials, it is theoretically shown that compact metallodielectric waveguides can be designed with a∼500×500 nm2core size around the 1550 nm telecommunication wavelength. The examined waveguides can be interpreted as a gap SPP waveguide with an inner dielectric core. Compared to pure SPP waveguides, such hybrid waveguides have a comparable mode field size, but with significantly lower loss (∼0.05 dB/μmfor either quasi-TE or quasi-TM operation). Therefore they can be potentially deployed for a range of integrated photonic applications.

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