scholarly journals Optical, photonic and optoelectronic properties of graphene, h-BN and their hybrid materials

Nanophotonics ◽  
2017 ◽  
Vol 6 (5) ◽  
pp. 943-976 ◽  
Author(s):  
Jingang Wang ◽  
Fengcai Ma ◽  
Wenjie Liang ◽  
Rongming Wang ◽  
Mengtao Sun
Keyword(s):  
Dispersion Relation ◽  
Boron Nitride ◽  
Flat Surface ◽  
Hexagonal Boron Nitride ◽  
Wide Band ◽  
Atomic Level ◽  
Ultra Wide Band ◽  
Linear Dispersion ◽  
Linear Dispersion Relation ◽  
Far Ultraviolet

AbstractBecause of the linear dispersion relation and the unique structure of graphene’s Dirac electrons, which can be tuned the ultra-wide band, this enables more applications in photonics, electronics and plasma optics. As a substrate, hexagonal boron nitride (h-BN) has an atomic level flat surface without dangling bonds, a weak doping effect and a response in the far ultraviolet area. So the graphene/h-BN heterostructure is very attractive due to its unique optical electronics characteristics. Graphene and h-BN which are stacked in different ways could open the band gap of graphene, and form a moiré pattern for graphene on h-BN and the superlattice in the Brillouin zone, which makes it possible to build photoelectric devices.

Linear dispersion relation for a fluid of light in an atomic vapor

2017 ◽  
Author(s):  
Quentin Fontaine ◽  
Agostino Apra ◽  
Giovanni Lerario ◽  
Elisabeth Giacobino ◽  
Alberto Bramati ◽  
...  
Keyword(s):  
Dispersion Relation ◽  
Atomic Vapor ◽  
Linear Dispersion ◽  
Linear Dispersion Relation

scholarly journals Dispersive magnetized waves in the solar wind plasma

2010 ◽  
Vol 77 (3) ◽  
pp. 357-365 ◽  
Author(s):  
B. DASGUPTA ◽  
DASTGEER SHAIKH ◽  
P. K. SHUKLA
Keyword(s):  
Solar Wind ◽  
Dispersion Relation ◽  
Fluid Model ◽  
Phase Speed ◽  
Solar Wind Plasma ◽  
Small Scale ◽  
Linear Dispersion ◽  
Length Scales ◽  
Linear Dispersion Relation ◽  
Two Fluid Model

AbstractWe derive a generalized linear dispersion relation of waves in a strongly magnetized, compressible, homogeneous and isotropic quasi-neutral plasma. Starting from a two-fluid model, describing distinguishable electron and ion fluids, we obtain a six-order linear dispersion relation of magnetized waves that contains effects due to electron and ion inertia, finite plasma beta and angular dependence of phase speed. We investigate propagation characteristics of these magnetized waves in a regime where scale lengths are comparable with electron and ion inertial length scales. This regime corresponds essentially to the solar wind plasma, where length scales, comparable with ion cyclotron frequency, lead to dispersive effects. These scales in conjunction with linear waves present a great deal of challenges in understanding the high-frequency, small-scale dynamics of turbulent fluctuations in the solar wind plasma.

scholarly journals Measurement of the dispersion relation for random surface gravity waves

2015 ◽  
Vol 766 ◽  
pp. 326-336 ◽  
Author(s):  
Tore Magnus A. Taklo ◽  
Karsten Trulsen ◽  
Odin Gramstad ◽  
Harald E. Krogstad ◽  
Atle Jensen
Keyword(s):  
Dispersion Relation ◽  
Gravity Waves ◽  
Laboratory Experiments ◽  
Surface Gravity ◽  
Linear Dispersion ◽  
Random Surface ◽  
Zakharov Equation ◽  
Surface Gravity Waves ◽  
Linear Dispersion Relation ◽  
Jonswap Spectrum

AbstractWe report laboratory experiments and numerical simulations of the Zakharov equation, designed to have sufficient resolution in space and time to measure the dispersion relation for random surface gravity waves. The experiments and simulations are carried out for a JONSWAP spectrum and Gaussian spectra of various bandwidths on deep water. It is found that the measured dispersion relation deviates from the linear dispersion relation above the spectral peak when the bandwidth is sufficiently narrow.

Terahertz planar waveguide devices based on graphene

2017 ◽  
Vol 31 (05) ◽  
pp. 1750045
Author(s):  
Yizhe Yuan ◽  
Xiaoyong Guo ◽  
Liqun An ◽  
Wen Xu
Keyword(s):  
Dispersion Relation ◽  
Planar Waveguide ◽  
Theoretical Study ◽  
Transmission Characteristics ◽  
Linear Dispersion ◽  
Linear Dispersion Relation ◽  
Planar Structures ◽  
Waveguide Devices

We present a theoretical study on graphene-semiconductor planar structures. The frequency of the photonic modes in the structure, which can be efficiently tuned via varying the sample parameters, is within the terahertz (THz) bandwidth. Furthermore, it is found that a roughly linear dispersion relation can be obtained for photonic modes in the THz region. Hence, the proposed graphene-semiconductor planar structures can be served as THz waveguide with desirable transmission characteristics.

scholarly journals Graphene, hexagonal boron nitride, and their heterostructures: properties and applications

RSC Advances ◽  
2017 ◽  
Vol 7 (27) ◽  
pp. 16801-16822 ◽  
Author(s):  
Jingang Wang ◽  
Fengcai Ma ◽  
Mengtao Sun
Keyword(s):  
Transition Metal ◽  
Boron Nitride ◽  
Hexagonal Boron Nitride ◽  
Atomic Level ◽  
Black Phosphorus ◽  
Metal Sulfides ◽  
Two Dimensional ◽  
Transition Metal Sulfides ◽  
Widespread Interest

In recent years, two-dimensional atomic-level thickness crystal materials have attracted widespread interest such as graphene, hexagonal boron nitride (h-BN), silicene, germanium, black phosphorus (BP), transition metal sulfides and so on.

A mini review on chemical vapor deposition growth of wafer-scale h-BN single crystals

Nanoscale ◽  
2021 ◽  
Author(s):  
Lin Li ◽  
Ye Zhang ◽  
ruijie Zhang ◽  
Ziyi Han ◽  
Huanli Dong ◽  
...  
Keyword(s):  
Chemical Vapor Deposition ◽  
Boron Nitride ◽  
Single Crystals ◽  
Vapor Deposition ◽  
Flat Surface ◽  
Hexagonal Boron Nitride ◽  
Chemical Vapor ◽  
Chemical Vapor Deposition Growth ◽  
The Past ◽  
Excellent Stability

Hexagonal boron nitride (h-BN), with its excellent stability, flat surface and large bandgap, plays a role in a variety of fundamental science and technology fields. The past few years have...

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