Optical switching of Mg-rich Mg–Ni alloy thin films

2002 ◽  
Vol 81 (25) ◽  
pp. 4709-4711 ◽  
Author(s):  
K. Yoshimura ◽  
Y. Yamada ◽  
M. Okada
Keyword(s):  
Thin Films ◽  
Optical Switching ◽  
Ni Alloy

Optical switching property of Pd-capped Mg–Ni alloy thin films prepared by magnetron sputtering

Vacuum ◽  
2006 ◽  
Vol 80 (7) ◽  
pp. 684-687 ◽  
Author(s):  
Kazuki Yoshimura ◽  
Shanhu Bao ◽  
Yasusei Yamada ◽  
Masahisa Okada
Keyword(s):  
Thin Films ◽  
Magnetron Sputtering ◽  
Optical Switching ◽  
Ni Alloy ◽  
Switching Property

Oriented conjugated polymer thin films for all optical switching applications

2005 ◽  
Author(s):  
Ileana Rau ◽  
Pierre-Alain Chollet ◽  
Francois Kajzar ◽  
Roberto Zamboni
Keyword(s):  
Thin Films ◽  
Conjugated Polymer ◽  
Optical Switching ◽  
Polymer Thin Films ◽  
All Optical ◽  
All Optical Switching

INVESTIGATION OF THIRD-ORDER NONLINEAR OPTICAL PROPERTIES OF BFDT-DOPED PMMA THIN FILMS USING Z-SCAN TECHNIQUE

2009 ◽  
Vol 23 (28) ◽  
pp. 3361-3368
Author(s):  
HELIANG FAN ◽  
XINQIANG WANG ◽  
QUAN REN ◽  
TINGBIN LI ◽  
JING SUN ◽  
...  
Keyword(s):  
Thin Films ◽  
Optical Properties ◽  
Optical Switching ◽  
Nonlinear Optical ◽  
Doping Concentration ◽  
Quartz Substrate ◽  
Nonlinear Coefficient ◽  
Nonlinear Optical Properties ◽  
Potential Candidate ◽  
Third Order

A series of polymeric thin films with BFDT (BFDT = 4,5-bis(foroylsulfanyl)-1,3-dithiole-2-thione) doped in PMMA (polymethylmethacrylate) were fabricated by means of spin-coating on quartz substrate. The third-order nonlinear optical properties of the films were investigated by Z-scan technique at 532 nm wavelength with 20 ps pulse width. The influences of doping concentration for third-order nonlinearity were also studied. A self-defocusing effect was observed from the Z-scan curves and the nonlinear refractive index of the film increases with the increase in doping concentration. Our results suggest that considerable nonlinear optical properties were found in BFDT. In addition, it was found that the nonlinear coefficient of the BFDT-doped PMMA thin film was about two orders of magnitude larger than that of homologous materials with organic solvents. By analysis, we can conclude that the material is a potential candidate for applications of nonlinear optics and can be considered in the fabrication of all-optical switching devices, etc.

scholarly journals From single to multiple pulse all-optical switching in GdFeCo thin films

2019 ◽  
Vol 100 (6) ◽  
Author(s):  
Yong Xu ◽  
Michel Hehn ◽  
Weisheng Zhao ◽  
Xiaoyang Lin ◽  
Grégory Malinowski ◽  
...  
Keyword(s):  
Thin Films ◽  
Optical Switching ◽  
Multiple Pulse ◽  
All Optical ◽  
All Optical Switching

Vanadium Dioxide Thin Films for Thermo-Optical Switching Applications

2003 ◽  
Vol 785 ◽  
Author(s):  
Lijun Jiang ◽  
William N. Carr
Keyword(s):  
Thin Films ◽  
Phase Transition ◽  
Vanadium Dioxide ◽  
Optical Switching ◽  
Abrupt Change ◽  
Metal Layer ◽  
Heating And Cooling ◽  
Optical Switching Devices ◽  
Lift Off ◽  
Vanadium Dioxide Thin Films

ABSTRACTVanadium dioxide (VO2) thin films were fabricated by e-beam evaporation of vanadium thin films followed by thermal oxidation in oxygen ambient. The properties of the VO2 films were investigated for thermo-optical switching applications. Synthesized VO2 film displays a phase transition at 65 – 68 °C. It exhibits an abrupt change in optical reflectivity over the phase transition temperature range. Results for VO2 on a highly reflective metal layer are strongly dependent on the VO2 thickness. The optical switching has a major hysteresis of about 15 °C between the heating and cooling branches. The evolution of the surface morphology with the oxidation time was studied with a SEM. The VO2 film was patterned on microplatforms by metal lift-off technique. We conclude that the evaporation followed by oxidation is an effective method to produce active VO2 film for thermo-optical switching devices.

scholarly journals Metal–insulator-transition engineering by modulation tilt-control in perovskite nickelates for room temperature optical switching

2018 ◽  
Vol 115 (38) ◽  
pp. 9515-9520 ◽  
Author(s):  
Zhaoliang Liao ◽  
Nicolas Gauquelin ◽  
Robert J. Green ◽  
Knut Müller-Caspary ◽  
Ivan Lobato ◽  
...  
Keyword(s):  
Thin Films ◽  
Optical Switching ◽  
Room Temperature ◽  
Target Material ◽  
Insulator Transition ◽  
Fine Tuning ◽  
Perovskite Oxide ◽  
Metal Insulator Transition ◽  
Metal Insulator ◽  
Bond Angles

In transition metal perovskites ABO3, the physical properties are largely driven by the rotations of the BO6 octahedra, which can be tuned in thin films through strain and dimensionality control. However, both approaches have fundamental and practical limitations due to discrete and indirect variations in bond angles, bond lengths, and film symmetry by using commercially available substrates. Here, we introduce modulation tilt control as an approach to tune the ground state of perovskite oxide thin films by acting explicitly on the oxygen octahedra rotation modes—that is, directly on the bond angles. By intercalating the prototype SmNiO3 target material with a tilt-control layer, we cause the system to change the natural amplitude of a given rotation mode without affecting the interactions. In contrast to strain and dimensionality engineering, our method enables a continuous fine-tuning of the materials’ properties. This is achieved through two independent adjustable parameters: the nature of the tilt-control material (through its symmetry, elastic constants, and oxygen rotation angles), and the relative thicknesses of the target and tilt-control materials. As a result, a magnetic and electronic phase diagram can be obtained, normally only accessible by A-site element substitution, within the single SmNiO3 compound. With this unique approach, we successfully adjusted the metal–insulator transition (MIT) to room temperature to fulfill the desired conditions for optical switching applications.

Vis-IR Optical Switching/ Modulation Based on the Electrically- Activated Phase Transition of VO2 Thin Films

2010 ◽  
Author(s):  
Aurelian Crunteanu ◽  
Marc Fabert ◽  
Julien Givernaud ◽  
Vincent Kermène ◽  
Agnès Desfarges-Berthelemot ◽  
...  
Keyword(s):  
Thin Films ◽  
Phase Transition ◽  
Optical Switching ◽  
Vo2 Thin Films

Shape memory effect in thin films of a Cu–Al–Ni alloy

2008 ◽  
Vol 481-482 ◽  
pp. 426-430 ◽  
Author(s):  
F.C. Lovey ◽  
A.M. Condó ◽  
J. Guimpel ◽  
M.J. Yacamán
Keyword(s):  
Thin Films ◽  
Shape Memory ◽  
Shape Memory Effect ◽  
Memory Effect ◽  
Ni Alloy

The Effects of Ground and Space Processing on the Properties of Organic, Polymeric, and Colloidal Materials

1998 ◽  
Vol 551 ◽  
Author(s):  
Donald O. Frazier ◽  
Mark S. Paley ◽  
Benjamin G. Penn ◽  
Hossin A. Abdeldayem ◽  
David D. Smith ◽  
...  
Keyword(s):  
Thin Films ◽  
Vapor Deposition ◽  
Optical Switching ◽  
Frequency Conversion ◽  
High Efficiency ◽  
Organic Materials ◽  
Optical Loss ◽  
Polymeric Materials ◽  
Third Order ◽  
Buoyancy Driven Convection

AbstractIn recent years, a great deal of interest has been directed toward the use of organic materials in the development of high-efficiency optoelectronic and photonic devices. There is a myriad of possibilities among organic materials, which allows flexibility in the design of unique structures with a variety of functional groups. The use of nonlinear optical (NLO) organic materials as thin-film waveguides allows full exploitation of their desirable qualities by permitting long interaction lengths and large susceptibilities allowing modest power input. There are several methods in use to prepare thin films such as Langmuir-Blodgett (LB) and self-assembly techniques,2-4 vapor deposition.5-7 growth from sheared solution or melt,8,9 and melt growth between glass plates.10 Organic-based materials have many features that make them desirable for use in optical devices, such as high second- and third-order nonlinearity, flexibility of molecular design, and damage resistance to optical radiation. However, processing difficulties for crystals and thin films has hindered their use in devices.We discuss the potential role of microgravity processing of a few organic and polymeric materials. It is of interest to note how materials with second- and third-order NLO behavior may be improved in a diffusion-limited environment and ways in which convection may be detrimental to these materials. We focus our discussion on third-order materials for all-optical switching, and second-order materials for frequency conversion and electro-optics. The goal of minimizing optical loss obviously depends on processing methods. For solution-based processes, such as solution crystal growth and solution photopolymerization, it is well known that thermal- and solutal-density gradients can initiate buoyancy-driven convection. Resultant fluid flows can affect transport of material to and from growth interfaces and become manifest in the morphology and homogeneity of the growing film or crystal. Likewise, buoyancy-driven convection can hinder production of defect-free, high-quality crystals or films during crystal and film growth by vapor deposition.

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