Micro-optical switch device based on semiconductor-to-metallic phase transition characteristics of W-doped VO2 smart coatings

2007 ◽  
Vol 25 (4) ◽  
pp. 971-975 ◽  
Author(s):  
M. Soltani ◽  
M. Chaker ◽  
E. Haddad ◽  
R. Kruzelecky ◽  
J. Margot
Keyword(s):  
Phase Transition ◽  
Optical Switch ◽  
Metallic Phase ◽  
Smart Coatings

scholarly journals Tunable Infrared Optical Switch Based on Vanadium Dioxide

Nanomaterials ◽  
2021 ◽  
Vol 11 (11) ◽  
pp. 2988
Author(s):  
Qi Wang ◽  
Shijie Zhang ◽  
Chen Wang ◽  
Rui Li ◽  
Tianhan Cai ◽  
...  
Keyword(s):  
Thin Film ◽  
Vanadium Dioxide ◽  
Optical Switching ◽  
Modulation Depth ◽  
Optical Switch ◽  
Extinction Ratio ◽  
Infrared Region ◽  
Metallic Phase ◽  
Ultrafast Switching ◽  
Difference Time

A tunable infrared optical switch based on a plasmonic structure consisting of aluminum nanoarrays with a thin film of vanadium dioxide is proposed. This optical switch can realize arbitrary wavelength-selective optical switching in the mid-infrared region by altering the radii of the aluminum nanoarrays. Furthermore, since vanadium dioxide transforms from its low-temperature insulator phase to a high-temperature metallic phase when heated or applied voltage, the optical switch can achieve two-way switching of its “ON” and “OFF” modes. Finite-difference time-domain software is used to simulate the performance of the proposed infrared optical switch. Simulation results show that the switch offers excellent optical performances, that the modulation depth can reach up to 99.4%, and that the extinction ratio exceeds −22.16 dB. In addition, the phase transition time of vanadium dioxide is on the femtosecond scale, which means that this optical switch based on a vanadium dioxide thin film can be used for ultrafast switching.

Insulating state and metallic phase transition of heavily sodium-doped low-silica X (LSX) zeolites

2012 ◽  
Vol 73 (12) ◽  
pp. 1538-1541 ◽  
Author(s):  
Yasuo Nozue ◽  
Yusaku Amako ◽  
Ryoko Kawano ◽  
Takahiro Mizukane ◽  
Takehito Nakano
Keyword(s):  
Phase Transition ◽  
Metallic Phase

Pressure driven semi-metallic phase transition of Sb2Te3

2017 ◽  
Vol 209 ◽  
pp. 78-81 ◽  
Author(s):  
Junkai Zhang ◽  
Tingjing Hu ◽  
Jiejuan Yan ◽  
Feng Ke ◽  
Jingshu Wang ◽  
...  
Keyword(s):  
Phase Transition ◽  
Metallic Phase ◽  
Pressure Driven

Functional Metamaterials Based on Mesoscale Gold Sponges, Particulate Aggregates, and Their Composites with Dielectric Materials

2006 ◽  
Vol 964 ◽  
Author(s):  
Michael Cortie ◽  
Abbas Maaroof ◽  
Geoff B Smith
Keyword(s):  
Phase Transition ◽  
Optical Properties ◽  
Plasmon Resonance ◽  
Composite Structures ◽  
Dielectric Materials ◽  
Continuous Phase ◽  
Metallic Phase ◽  
Dipole Approximation ◽  
Functional Material ◽  
Nanoscale Composites

ABSTRACTThe optical properties of some nanoscale composites may deviate from that expected from a simple law of mixture of their individual components. In these cases the resulting structure can be considered to be a type of “metamaterial”. Here we explore some of the possibilities for nanoscale composite structures comprised of gold and VO2 – the latter being a functional material that undergoes a reversible insulator to metallic phase transition at 68°C. Two microstructures are examined: aggregates of gold nanoparticles surrounded by VO2 as the continuous phase, and its geometric inverse, mesoporous gold sponge with discontinuous VO2 inclusions. A composite, right-angled parallelepiped measuring 40×100×100 nm is taken as representative of the mixture, and calculations of the optical properties performed using the discrete dipole approximation code of Draine and Flatau. The VO2 matrix strongly attenuates the dipole-dipole plasmon resonance of the gold structure, and thermochromic switching of the remaining plasmon resonance occurs

Atomic mechanism of the semiconducting-to-metallic phase transition in single-layered MoS2

2014 ◽  
Vol 9 (5) ◽  
pp. 391-396 ◽  
Author(s):  
Yung-Chang Lin ◽  
Dumitru O. Dumcenco ◽  
Ying-Sheng Huang ◽  
Kazu Suenaga
Keyword(s):  
Phase Transition ◽  
Metallic Phase ◽  
Atomic Mechanism ◽  
Layered Mos2
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