scholarly journals Light-emitting metasurfaces

Nanophotonics ◽  
2019 ◽  
Vol 8 (7) ◽  
pp. 1151-1198 ◽  
Author(s):  
Aleksandr Vaskin ◽  
Radoslaw Kolkowski ◽  
A. Femius Koenderink ◽  
Isabelle Staude
Keyword(s):  
State Of The Art ◽  
The State ◽  
Light Fields ◽  
Light Sources ◽  
Two Dimensional ◽  
Direct Integration ◽  
Resonant Response ◽  
Light Emitting ◽  
Light Emitting Devices ◽  
Review Reports

AbstractPhotonic metasurfaces, that is, two-dimensional arrangements of designed plasmonic or dielectric resonant scatterers, have been established as a successful concept for controlling light fields at the nanoscale. While the majority of research so far has concentrated on passive metasurfaces, the direct integration of nanoscale emitters into the metasurface architecture offers unique opportunities ranging from fundamental investigations of complex light-matter interactions to the creation of flat sources of tailored light fields. While the integration of emitters in metasurfaces as well as many fundamental effects occurring in such structures were initially studied in the realm of nanoplasmonics, the field has recently gained significant momentum following the development of Mie-resonant dielectric metasurfaces. Because of their low absorption losses, additional possibilities for emitter integration, and compatibility with semiconductor-based light-emitting devices, all-dielectric systems are promising for highly efficient metasurface light sources. Furthermore, a flurry of new emission phenomena are expected based on their multipolar resonant response. This review reports on the state of the art of light-emitting metasurfaces, covering both plasmonic and all-dielectric systems.

scholarly journals Light-Quality Manipulation to Control Plant Growth and Photomorphogenesis in Greenhouse Horticulture: The State of the Art and the Opportunities of Modern LED Systems

2021 ◽  
Author(s):  
Roberta Paradiso ◽  
Simona Proietti
Keyword(s):  
Plant Growth ◽  
State Of The Art ◽  
Control Plant ◽  
Spectral Composition ◽  
Environmental Parameters ◽  
The State ◽  
Light Sources ◽  
Light Spectrum ◽  
Light Emitting ◽  
Greenhouse Horticulture

AbstractLight quantity (intensity and photoperiod) and quality (spectral composition) affect plant growth and physiology and interact with other environmental parameters and cultivation factors in determining the plant behaviour. More than providing the energy for photosynthesis, light also dictates specific signals which regulate plant development, shaping and metabolism, in the complex phenomenon of photomorphogenesis, driven by light colours. These are perceived even at very low intensity by five classes of specific photoreceptors, which have been characterized in their biochemical features and physiological roles. Knowledge about plant photomorphogenesis increased dramatically during the last years, also thanks the diffusion of light-emitting diodes (LEDs), which offer several advantages compared to the conventional light sources, such as the possibility to tailor the light spectrum and to regulate the light intensity, depending on the specific requirements of the different crops and development stages. This knowledge could be profitably applied in greenhouse horticulture to improve production schedules and crop yield and quality. This article presents a brief overview on the effects of light spectrum of artificial lighting on plant growth and photomorphogenesis in vegetable and ornamental crops, and on the state of the art of the research on LEDs in greenhouse horticulture. Particularly, we analysed these effects by approaching, when possible, each single-light waveband, as most of the review works available in the literature considers the influence of combined spectra.

Practical Nanoscale Silicon Light Emitters

1997 ◽  
Vol 486 ◽  
Author(s):  
Philippe M. Fauchet
Keyword(s):  
Porous Silicon ◽  
Materials Science ◽  
State Of The Art ◽  
The State ◽  
Light Emitters ◽  
Light Emitting ◽  
Light Emitting Devices ◽  
Commercial Applications ◽  
Silicon Based ◽  
Device Properties

AbstractImpressive advances have been made over the last few years in teaching silicon how to emit light. Recently, light-emitting devices made of porous silicon and other forms of nanoscale silicon have been demonstrated with specifications that start to make them attractive for commercial applications. This paper reviews the state-of-the-art in the materials science and device properties of nanoscale silicon-based LEDs, including their integration with microelectronic circuits.

Multimedia-Enabled Dot Codes as Communication Aids

2021 ◽  
pp. 331-345
Author(s):  
Shigeru Ikuta ◽  
Masamichi Watanuki ◽  
Shinya Abe
Keyword(s):  
Special Needs ◽  
State Of The Art ◽  
The State ◽  
Digital Information ◽  
Two Dimensional ◽  
Basic Information ◽  
Communication Aids ◽  
Teaching Materials ◽  
The World ◽  
The Creation

Grid Onput is a set of novel two-dimensional codes comprising extremely small dots. The present authors recently developed software to overlap the dot codes on the user's designed sheet, to create a content to replay audios, to create a standalone application to replay multimedia, and to create an application to replay multimedia on iPad. Simply touching the dot codes with a speaking-pen and/or a dot-code reader enables users to directly access the corresponding digital information; a maximum of four mediums can be easily linked to each dot code icon. In collaboration with schoolteachers all over the world, one of the authors, Shigeru Ikuta, has been creating a variety of original self-made content and conducting various activities at both general and special needs schools. This chapter outlines the recent development of the state-of-the-art Grid Onput dot code technology and presents basic information regarding the creation of original teaching materials using newly developed software and the use at both general and special needs schools.

scholarly journals Erratum to: The state of the art in the analysis of two-dimensional gel electrophoresis images

2008 ◽  
Vol 79 (2) ◽  
pp. 329-329
Author(s):  
Matthias Berth ◽  
Frank Michael Moser ◽  
Markus Kolbe ◽  
Jörg Bernhardt
Keyword(s):  
Gel Electrophoresis ◽  
State Of The Art ◽  
The State ◽  
Two Dimensional ◽  
Two Dimensional Gel Electrophoresis

Recent progress in the tailored growth of two-dimensional hexagonal boron nitride via chemical vapour deposition

2018 ◽  
Vol 47 (12) ◽  
pp. 4242-4257 ◽  
Author(s):  
Jingyu Sun ◽  
Chen Lu ◽  
Yingze Song ◽  
Qingqing Ji ◽  
Xiuju Song ◽  
...  
Keyword(s):  
Boron Nitride ◽  
Chemical Vapour Deposition ◽  
Recent Progress ◽  
Vapour Deposition ◽  
State Of The Art ◽  
Hexagonal Boron Nitride ◽  
Chemical Vapour ◽  
The State ◽  
Two Dimensional

A tutorial review of the state-of-the-art in the tailored growth of two-dimensional h-BN by virtue of CVD routes.

SPIN DYNAMICS OF TWO-DIMENSIONAL HUBBARD SYSTEMS

1990 ◽  
Vol 04 (21) ◽  
pp. 1325-1340 ◽  
Author(s):  
DAVID KO
Keyword(s):  
High Temperature ◽  
Strong Coupling ◽  
High Temperature Superconductivity ◽  
State Of The Art ◽  
Spin Dynamics ◽  
The State ◽  
Strong Coupling Limit ◽  
Two Dimensional ◽  
Two Dimension ◽  
Basic Ideas

The discovery of high temperature superconductivity has motivated a vigorous study of the physics of Hubbard systems. Here, the properties of the spin aspects of the Hubbard system in two-dimension, in the strong coupling limit, are briefly reviewed, with the basic ideas, some of the fundamental questions and the state of the art introduced.

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