scholarly journals Experimental evidence of charged domain walls in lead-free ferroelectric ceramics: light-driven nanodomain switching

Nanoscale ◽  
2018 ◽  
Vol 10 (2) ◽  
pp. 705-715 ◽  
Author(s):  
Fernando Rubio-Marcos ◽  
Adolfo Del Campo ◽  
Rocío E. Rojas-Hernandez ◽  
Mariola O. Ramírez ◽  
Rodrigo Parra ◽  
...  
Keyword(s):  
Domain Wall ◽  
Experimental Evidence ◽  
Domain Walls ◽  
Lead Free ◽  
Ferroelectric Ceramics ◽  
Next Generation ◽  
Emergent Phenomena ◽  
Matter Interaction ◽  
Potential Applications ◽  
Light Matter Interaction

Emergent phenomena driven by light–matter interaction may have potential applications in next-generation domain wall nanoelectronics utilizing polycrystalline ferroelectrics.

Ferroelectric polarization and domain walls in orthorhombic (K1−xNax)NbO3 lead-free ferroelectric ceramics

2010 ◽  
Vol 96 (22) ◽  
pp. 221905 ◽  
Author(s):  
Ning Lu ◽  
Rong Yu ◽  
Zhiying Cheng ◽  
Yejing Dai ◽  
Xiaowen Zhang ◽  
...  
Keyword(s):  
Domain Walls ◽  
Lead Free ◽  
Ferroelectric Ceramics ◽  
Ferroelectric Polarization

scholarly journals Sensing Enhancement of Electromagnetically Induced Transparency Effect in Terahertz Metamaterial by Substrate Etching

2021 ◽  
Vol 9 ◽  
Author(s):  
Tingling Lin ◽  
Yi Huang ◽  
Shuncong Zhong ◽  
Manting Luo ◽  
Yujie Zhong ◽  
...  
Keyword(s):  
Electric Field ◽  
Electromagnetically Induced Transparency ◽  
High Sensitivity ◽  
Strong Light ◽  
Refractive Index Sensing ◽  
Quadrupole Resonance ◽  
Matter Interaction ◽  
Potential Applications ◽  
Light Matter Interaction ◽  
Induced Transparency

A broad range of terahertz (THz) metamaterials have been developed for refractive index sensing. However, most of these metamaterials barely make sufficient use of the excited electric field which is crucial to achieve high sensitivity. Here, we proposed a metamaterial sensor possessing electromagnetically induced transparency (EIT) resonance that is formed by the interference of dipole and quadrupole resonance. In particular, the strengthening of light-matter interaction is realized through substrate etching, leading to a remarkable improvement in sensitivity. Hence, three kinds of etching mode were presented to maximize the utilization of the electric field, and the corresponding highest sensitivity is enhanced by up to ~2.2-fold, from 0.260 to 0.826 THz/RIU. The proposed idea to etch substrate with a strong light-matter interaction can be extended to other metamaterial sensors and possesses potential applications in integrating metamaterial and microfluid for biosensing.

Investigations on Plasmonic Modes of Noble Metal Nano-Disks Using High-Resolution Cathodoluminescence Imaging Spectroscopy

2011 ◽  
Vol 1294 ◽  
Author(s):  
Anil Kumar ◽  
Kin Hung Fung ◽  
Nicholas X. Fang
Keyword(s):  
Electron Beam ◽  
Electron Beam Lithography ◽  
Size Dependence ◽  
Imaging Spectroscopy ◽  
Monochromatic Imaging ◽  
Matter Interaction ◽  
Potential Applications ◽  
Light Matter Interaction ◽  
Imaging And Spectroscopy ◽  
Cathodoluminescence Imaging

ABSTRACTIn this work, we report investigations on plasmonic nano-disks using cathodoluminescence (CL) imaging and spectroscopy. 50 nm thick gold disks fabricated using electron beam lithography were studied and several modes were identified. Detailed analysis of the modes using monochromatic imaging and CL spectra showed strong size dependence. Our investigations on these plasmonic nano-disks allow understanding of light-matter interaction at nanoscale, with several potential applications including next generation plasmonic nano-lasers.

scholarly journals Metasurface Photodetectors

Micromachines ◽  
2021 ◽  
Vol 12 (12) ◽  
pp. 1584
Author(s):  
Jinzhao Li ◽  
Junyu Li ◽  
Shudao Zhou ◽  
Fei Yi
Keyword(s):  
Polarization State ◽  
Building Blocks ◽  
Optical Systems ◽  
Subwavelength Structures ◽  
Electromagnetic Parameters ◽  
Wide Range ◽  
Matter Interaction ◽  
Potential Applications ◽  
Light Matter Interaction ◽  
Detection Schemes

Photodetectors are the essential building blocks of a wide range of optical systems. Typical photodetectors only convert the intensity of light electrical output signals, leaving other electromagnetic parameters, such as the frequencies, phases, and polarization states unresolved. Metasurfaces are arrays of subwavelength structures that can manipulate the amplitude, phase, frequency, and polarization state of light. When combined with photodetectors, metasurfaces can enhance the light-matter interaction at the pixel level and also enable the detector pixels to resolve more electromagnetic parameters. In this paper, we review recent research efforts in merging metasurfaces with photodetectors towards improved detection performances and advanced detection schemes. The impacts of merging metasurfaces with photodetectors, on the architecture of optical systems, and potential applications are also discussed.

scholarly journals Unconventional level attraction in cavity axion polariton of antiferromagnetic topological insulator

2020 ◽  
Author(s):  
Yang Xiao ◽  
Huaiqiang Wang ◽  
Dinghui Wang ◽  
Ruifeng Lu ◽  
Xiao-Hong Yan ◽  
...  
Keyword(s):  
Dark Matter ◽  
Quantum Information ◽  
Strong Coupling ◽  
Topological Insulators ◽  
Linear Coupling ◽  
Odd Order ◽  
Matter Interaction ◽  
Potential Applications ◽  
Light Matter Interaction ◽  
Condensed Matters

Abstract Strong coupling between cavity photons and various excitations in condensed matters boosts the field of light-matter interaction and generates several exciting sub-fields, such as cavity optomechanics and cavity magnon polariton. Axion quasiparticles, emerging in topological insulators, were predicted to strongly couple with the light and generate the so-called axion polariton. Here, we demonstrate that there arises a gapless level attraction in cavity axion polariton of antiferromagnetic topological insulators, which originates from a nonlinear interaction between axion and the odd-order resonance of cavity. Such a novel level attraction is essentially different from conventional level attractions with the mechanism of either a linear coupling or a dissipation-mediated interaction, and also different from the level repulsion induced by the strong coupling in common polaritons. Our results reveal a new mechanism of level attractions, and open up new roads for exploring the axion polariton with cavity technologies. They have potential applications for quantum information and dark matter research.

The direct determination of magnetic domain wall profiles using a split detector STEM

1978 ◽  
Vol 36 (1) ◽  
pp. 466-467
Author(s):  
J.N. Chapman ◽  
P.E. Batson ◽  
E.M. Waddell ◽  
R.P. Ferrier
Keyword(s):  
Electron Microscope ◽  
Domain Wall ◽  
Transmission Electron Microscope ◽  
Domain Walls ◽  
Photographic Plate ◽  
Magnetic Domain ◽  
Direct Determination ◽  
Quantitative Information ◽  
Scanning Transmission Electron Microscope ◽  
Transmission Electron

By far the most commonly used mode of Lorentz microscopy in the examination of ferromagnetic thin films is the Fresnel or defocus mode. Use of this mode in the conventional transmission electron microscope (CTEM) is straightforward and immediately reveals the existence of all domain walls present. However, if such quantitative information as the domain wall profile is required, the technique suffers from several disadvantages. These include the inability to directly observe fine image detail on the viewing screen because of the stringent illumination coherence requirements, the difficulty of accurately translating part of a photographic plate into quantitative electron intensity data, and, perhaps most severe, the difficulty of interpreting this data. One solution to the first-named problem is to use a CTEM equipped with a field emission gun (FEG) (Inoue, Harada and Yamamoto 1977) whilst a second is to use the equivalent mode of image formation in a scanning transmission electron microscope (STEM) (Chapman, Batson, Waddell, Ferrier and Craven 1977), a technique which largely overcomes the second-named problem as well.

The need of electron microscopy in the study of domains and domain walls in ferroelectrics

1994 ◽  
Vol 52 ◽  
pp. 550-551
Author(s):  
Wenwu Cao
Keyword(s):  
Domain Wall ◽  
Domain Walls ◽  
High Mobility ◽  
Continuum Theory ◽  
Polarization Vector ◽  
Ferroelectric Materials ◽  
Dielectric Constants ◽  
Nonlocal Coupling ◽  
Cubic Symmetry ◽  
Gradient Energy

Domain structures play a key role in determining the physical properties of ferroelectric materials. The formation of these ferroelectric domains and domain walls are determined by the intrinsic nonlinearity and the nonlocal coupling of the polarization. Analogous to soliton excitations, domain walls can have high mobility when the domain wall energy is high. The domain wall can be describes by a continuum theory owning to the long range nature of the dipole-dipole interactions in ferroelectrics. The simplest form for the Landau energy is the so called ϕ model which can be used to describe a second order phase transition from a cubic prototype,where Pi (i =1, 2, 3) are the components of polarization vector, α's are the linear and nonlinear dielectric constants. In order to take into account the nonlocal coupling, a gradient energy should be included, for cubic symmetry the gradient energy is given by,

Quantum description of light–matter coupling

2017 ◽  
Author(s):  
Alexey V. Kavokin ◽  
Jeremy J. Baumberg ◽  
Guillaume Malpuech ◽  
Fabrice P. Laussy
Keyword(s):  
Cavity Mode ◽  
Optical Field ◽  
Level System ◽  
Bloch Equations ◽  
Optical Bloch Equations ◽  
Matter Coupling ◽  
Matter Interaction ◽  
Light Matter Interaction ◽  
Full Quantum ◽  
The Ideal

In this chapter we study with the tools developed in Chapter 3 the basic models that are the foundations of light–matter interaction. We start with Rabi dynamics, then consider the optical Bloch equations that add phenomenologically the lifetime of the populations. As decay and pumping are often important, we cover the Lindblad form, a correct, simple and powerful way to describe various dissipation mechanisms. Then we go to a full quantum picture, quantizing also the optical field. We first investigate the simpler coupling of bosons and then culminate with the Jaynes–Cummings model and its solution to the quantum interaction of a two-level system with a cavity mode. Finally, we investigate a broader family of models where the material excitation operators differ from the ideal limits of a Bose and a Fermi field.

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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