Light controlled bending of a holographic transmission phase grating

2022 ◽  
Author(s):  
riccardo castagna ◽  
Andrea Di Donato ◽  
Giuseppe Strangi ◽  
Daniele Eugenio Lucchetta
Keyword(s):  
Thin Film ◽  
Optical Properties ◽  
Light Source ◽  
Visible Range ◽  
Free Standing ◽  
Transmission Grating ◽  
Entire Structure ◽  
Phase Transmission ◽  
External Light Source ◽  
Transmission Phase

Abstract We recorded a permanent phase transmission grating on a thin film made by using a recently developed holographic photomobile mixture. The recorded grating pitch falls in the visible range and can be optically manipulated by using an external coherent or incoherent low power light source. When the external light source illuminates the grating the entire structure bends and, as a consequence, the optical properties of the grating change. This peculiarity makes it possible to use the recorded periodic structure as an all-optically controlled free standing thin colour selector or light switch depending on the source used to illuminate the grating itself. Additionally, it could open up new possibilities for stretchable and reconfigurable holograms controlled by light as well as thin devices for optically reconfigurable dynamic communications and displays.

Optical Properties of Hybrid Inorganic/Organic Thin Film Encapsulation Layers for Flexible Top-Emission Organic Light-Emitting Diodes

2015 ◽  
Vol 15 (10) ◽  
pp. 8199-8204
Author(s):  
Jae Seok An ◽  
Ha Jun Jang ◽  
Cheol Young Park ◽  
Hongseok Youn ◽  
Jong Ho Lee ◽  
...  
Keyword(s):  
Thin Film ◽  
Optical Properties ◽  
Water Vapor ◽  
Light Emitting Diodes ◽  
Organic Light Emitting Diodes ◽  
Visible Range ◽  
Hybrid Thin Film ◽  
Light Emitting ◽  
Organic Light ◽  
Thin Film Encapsulation

Inorganic/organic hybrid thin film encapsulation layers consist of a thin Al2O3 layer together with polymer material. We have investigated optical properties of thin film encapsulation layers for topemission flexible organic light-emitting diodes. The transmittance of hybrid thin film encapsulation layers and the electroluminescent spectrum of organic light-emitting diodes that were passivated by hybrid organic/inorganic thin film encapsulation layers were also examined as a function of the thickness of inorganic Al2O3 and monomer layers. The number of interference peaks, their intensity, and their positions in the visible range can be controlled by varying the thickness of inorganic Al2O3 layer. On the other hand, changing the thickness of monomer layer had a negligible effect on the optical properties. We also verified that there is a trade-off between transparency in the visible range and the permeation of water vapor in hybrid thin film encapsulation layers. As the number of dyads decreased, optical transparency improved while the water vapor permeation barrier was degraded. Our study suggests that, in top-emission organic light-emitting diodes, the thickness of each thin film encapsulation layer, in particular that of the inorganic layer, and the number of dyads should be controlled for highly efficient top-emission flexible organic light-emitting diodes.

scholarly journals Electrical and optical properties of Ga-doped ZnO thin films deposited by DC magnetron sputtering

2020 ◽  
Vol 4 (1) ◽  
pp. 15
Author(s):  
Lukman Nulhakim ◽  
Monna Rozana ◽  
Brian Yuliarto ◽  
Hisao Makino
Keyword(s):  
Thin Film ◽  
Optical Properties ◽  
Magnetron Sputtering ◽  
Gas Flow ◽  
Transparent Conducting Oxide ◽  
Visible Range ◽  
Dc Magnetron Sputtering ◽  
Electrical And Optical Properties ◽  
Doped Zno ◽  
Ar Gas

The electrical and optical properties of Ga-doped ZnO (GZO) thin film prepared by direct current (dc) magnetron sputtering were investigated. The GZO thin film was deposited on a glass substrate at a substrate temperature (Ts) of room temperature (RT), 150 °C, and 200 °C using DC power of 100 W and an Ar gas flow rate of 450 sccm. The thickness of films was maintained at about 200 nm by controlling the deposition rate of about 12.5 nm/minute. The result showed that the electrical properties improved with increasing Ts. The films deposited at Ts of 200 °C showed the lowest resistivity, highest hall mobility, and carrier concentration compared to other Ts. The average transmittance of the films in the visible range (380-750 nm) was approximately 86.04%. The value of the optical band gap (Eg) was approximately 3.8 eV. The results suggested that GZO films deposited by DC magnetron sputtering at Ts of 200 °C can be applied to transparent conducting oxide (TCO) as an electrode in optoelectronic applications such as solar cells, LEDs and display technology.

Development of a UV Light Source using Pr:LuAG Thin Film Target Pumped by Electron Beam

2015 ◽  
Vol 135 (9) ◽  
pp. 1049-1054
Author(s):  
Norio Ichikawa ◽  
Kohei Ikeda ◽  
Yoshinori Honda ◽  
Hiroyuki Taketomi ◽  
Koji Kawai ◽  
...  
Keyword(s):  
Thin Film ◽  
Electron Beam ◽  
Light Source ◽  
Uv Light

Physical and Optical Properties of The Films Ð’i2Te3-Bi2Se3

2015 ◽  
Vol 11 (2) ◽  
pp. 3017-3022
Author(s):  
Gurban Akhmedov
Keyword(s):  
Thin Film ◽  
Optical Properties ◽  
Surface Temperature ◽  
Thermal Evaporation ◽  
Low Voltage ◽  
Internal Surface ◽  
Differential Resistance ◽  
Work Cycle

Results of researches show, that film p-n the structures received by a method of discrete thermal evaporation in a uniform work cycle, are suitable for use in low-voltage devices.  As a result of work are received p-n heterojunctions in thin-film execution, described by high values of differential resistance. Show that, thermo endurance - T0 maybe using as characteristic of thermo endurance of optic materials. If heating flow, destruction temperature and internal surface temperature is measured during test, it is possible to determine value T0 and other necessity characteristics. As a result of the taking test was lead to comparison evaluation of considered materials. Working range of heating flow and up level heating embark have been determined.

scholarly journals Fabrication of Transparent Mg(OH)2 Thin Films by Drop-Dry Deposition

Materials ◽  
2021 ◽  
Vol 14 (4) ◽  
pp. 724
Author(s):  
Tong Li ◽  
Masaya Ichimura
Keyword(s):  
Thin Films ◽  
Aqueous Solution ◽  
Optical Properties ◽  
Surface Morphology ◽  
Magnesium Hydroxide ◽  
Dry Deposition ◽  
Visible Range ◽  
Substrate Heating ◽  
Water Effects ◽  
Deposition Conditions

Magnesium hydroxide (Mg(OH)2) thin films were deposited by the drop-dry deposition (DDD) method using an aqueous solution containing Mg(NO3)2 and NaOH. DDD was performed by dropping the solution on a substrate, heating-drying, and rinsing in water. Effects of different deposition conditions on the surface morphology and optical properties of Mg(OH)2 thin films were researched. Films with a thickness of 1−2 μm were successfully deposited, and the Raman peaks of Mg(OH)2 were observed for them. Their transmittance in the visible range was 95% or more, and the bandgap was about 5.8 eV. It was found that the thin films have resistivity of the order of 105 Ωcm. Thus, the transparent and semiconducting Mg(OH)2 thin films were successfully prepared by DDD.

Optical and magneto-optical properties of epitaxial Mn2GaC MAX phase thin film

2021 ◽  
Vol 528 ◽  
pp. 167803
Author(s):  
Sergey Lyaschenko ◽  
Olga Maximova ◽  
Dmitriy Shevtsov ◽  
Sergey Varnakov ◽  
Ivan Tarasov ◽  
...  
Keyword(s):  
Thin Film ◽  
Optical Properties ◽  
Max Phase

scholarly journals Author Correction: Crystal structure and optical properties of a high-density InGaN nanoumbrella array as a white light source without phosphors

2021 ◽  
Vol 13 (1) ◽  
Author(s):  
Tetsuya Kouno ◽  
Masaru Sakai ◽  
Katsumi Kishino ◽  
Akihiko Kikuchi ◽  
Naoki Umehara ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Optical Properties ◽  
Light Source ◽  
White Light ◽  
High Density ◽  
White Light Source

A Correction to this paper has been published: https://doi.org/10.1038/s41427-021-00298-9

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