Doping-driven electronic and lattice dynamics in the phase-change material vanadium dioxide

2020 ◽  
Vol 102 (11) ◽  
Author(s):  
Kannatassen Appavoo ◽  
Joyeeta Nag ◽  
Bin Wang ◽  
Weidong Luo ◽  
Gerd Duscher ◽  
...  
Keyword(s):  
Phase Change ◽  
Phase Change Material ◽  
Vanadium Dioxide ◽  
Lattice Dynamics ◽  
Change Material

Tuning the optical response of a dielectric grating using vanadium-dioxide as a phase-change material

2021 ◽  
Author(s):  
Muhammad Fayyaz Kashif ◽  
Tiziana Stomeo ◽  
Francesco Guido ◽  
Maria A. Vincenti ◽  
Irene Vassalini ◽  
...  
Keyword(s):  
Phase Change ◽  
Phase Change Material ◽  
Vanadium Dioxide ◽  
Optical Response ◽  
Dielectric Grating ◽  
Change Material

Fast electrical and optical activation of RF switches integrating vanadium dioxide (VO2) phase change material

2021 ◽  
Author(s):  
Crunteanu Aurelian ◽  
VK Thalakkatukalathil Vinod ◽  
Orlianges Jean-Christophe ◽  
Bessaudou Annie
Keyword(s):  
Phase Change ◽  
Phase Change Material ◽  
Vanadium Dioxide ◽  
Rf Switches ◽  
Optical Activation ◽  
Change Material

Thermally switchable terahertz metasurface absorber composed of H-fractal and enabled by phase-change material of vanadium dioxide

Frequenz ◽  
2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Hassan Divdel ◽  
Hamed Taghipour-Farshi ◽  
Hassan Rasooli Saghai ◽  
Mohammad-Ali Tavakoli Ghazi Jahani
Keyword(s):  
Phase Transition ◽  
Phase Change ◽  
Phase Change Material ◽  
Vanadium Dioxide ◽  
Ground Plane ◽  
Terahertz Range ◽  
Metallic State ◽  
Level 1 ◽  
Change Material ◽  
Level 2

Abstract A terahertz metasurface absorber with actively switchable bandwidth enabled by vanadium dioxide (VO2) is presented and investigated numerically. The VO2 is a phase-change material and its conductivity in the terahertz range changes by several orders of magnitude upon phase-transition. The metasurface consists of an H-shaped fractal resonator placed on top of a polyimide spacer and a ground-plane of gold. The resonator is composed of an H-shaped level-1 fractal of gold and VO2 strips that converts it to a level-2 fractal. At room temperatures, the VO2 is in the insulator state and the resonator reduces to a level-1 fractal offering narrowband absorption at 8.08 THz reaching 0.98 absorption. At higher temperatures, the VO2 is in the metallic state and the resonator is effectively a level-2 fractal with an absorption higher than 0.9 in a bandwidth of 6.63–9.89 THz.

NUMERICAL STUDY OF A SOLAR GREENHOUSE DRYER WITH A PHASE-CHANGE MATERIAL AS AN ENERGY STORAGE MEDIUM

2018 ◽  
Vol 49 (6) ◽  
pp. 509-528 ◽  
Author(s):  
Orawan Aumporn ◽  
Belkacem Zeghmati ◽  
Xavier Chesneau ◽  
Serm Janjai
Keyword(s):  
Energy Storage ◽  
Phase Change ◽  
Phase Change Material ◽  
Numerical Study ◽  
Storage Medium ◽  
Solar Greenhouse ◽  
Change Material

CONTROL OF HEAT RELEASE ENERGY DURING HEATING FROM SOLID-SOLID PHASE CHANGE MATERIAL

2018 ◽  
Author(s):  
Ryohei Gotoh ◽  
Tsuyoshi Totani ◽  
Masashi Wakita ◽  
Harunori Nagata
Keyword(s):  
Phase Change ◽  
Heat Release ◽  
Phase Change Material ◽  
Solid Phase ◽  
Change Material
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