Dynamic tuning of an infrared hybrid-metamaterial resonance using vanadium dioxide

2008 ◽  
Vol 93 (2) ◽  
pp. 024101 ◽  
Author(s):  
T. Driscoll ◽  
S. Palit ◽  
M. M. Qazilbash ◽  
M. Brehm ◽  
F. Keilmann ◽  
...  
Keyword(s):  
Vanadium Dioxide ◽  
Dynamic Tuning ◽  
Hybrid Metamaterial

Multi-band tunable terahertz bandpass filter based on vanadium dioxide hybrid metamaterial

2019 ◽  
Vol 6 (5) ◽  
pp. 055809 ◽  
Author(s):  
Yixin Fan ◽  
Yixian Qian ◽  
Shan Yin ◽  
Dongxia Li ◽  
Mingzhu Jiang ◽  
...  
Keyword(s):  
Vanadium Dioxide ◽  
Bandpass Filter ◽  
Hybrid Metamaterial ◽  
Multi Band

scholarly journals A dynamically adjustable broadband terahertz absorber based on a vanadium dioxide hybrid metamaterial

2020 ◽  
Vol 19 ◽  
pp. 103384
Author(s):  
Yongchen Liu ◽  
Yixian Qian ◽  
Fangrong Hu ◽  
Mingzhu Jiang ◽  
Longhui Zhang
Keyword(s):  
Vanadium Dioxide ◽  
Terahertz Absorber ◽  
Hybrid Metamaterial ◽  
Broadband Terahertz

scholarly journals Demonstration of Thermally Tunable Multi-Band and Ultra-Broadband Metamaterial Absorbers Maintaining High Efficiency during Tuning Process

Materials ◽  
2021 ◽  
Vol 14 (19) ◽  
pp. 5708
Author(s):  
Nanli Mou ◽  
Bing Tang ◽  
Jingzhou Li ◽  
Yaqiang Zhang ◽  
Hongxing Dong ◽  
...  
Keyword(s):  
Vanadium Dioxide ◽  
High Efficiency ◽  
No Reduction ◽  
Band Frequency ◽  
Dynamic Tuning ◽  
Process Simulations ◽  
Working Frequency ◽  
Metamaterial Absorbers ◽  
Tuning Process ◽  
Multi Band

Metamaterial absorbers (MMAs) with dynamic tuning features have attracted great attention recently, but most realizations to date have suffered from a decay in absorptivity as the working frequency shifts. Here, thermally tunable multi-band and ultra-broadband MMAs based on vanadium dioxide (VO2) are proposed, with nearly no reduction in absorption during the tuning process. Simulations demonstrated that the proposed design can be switched between two independently designable multi-band frequency ranges, with the absorptivity being maintained above 99.8%. Moreover, via designing multiple adjacent absorption spectra, an ultra-broadband switchable MMA that maintains high absorptivity during the tuning process is also demonstrated. Raising the ambient temperature from 298 K to 358 K, the broadband absorptive range shifts from 1.194–2.325 THz to 0.398–1.356 THz, while the absorptivity remains above 90%. This method has potential for THz communication, smart filtering, detecting, imaging, and so forth.

Optical properties of a thin layer of the Vanadium dioxide at the metal state

2015 ◽  
Vol 9 (1) ◽  
pp. 2303-2310
Author(s):  
Abderrahim Benchaib ◽  
Abdesselam Mdaa ◽  
Izeddine Zorkani ◽  
Anouar Jorio
Keyword(s):  
Optical Properties ◽  
Thin Layer ◽  
Vanadium Dioxide ◽  
Ultra Violet ◽  
Index Of Refraction ◽  
Cost Of Energy ◽  
Infra Red ◽  
Metal State ◽  
The Cost ◽  
Reversible Phase

The vanadium dioxide VO₂ currently became very motivating for the nanotechnologies’ researchers. It makes party of the intelligent materials because these optical properties abruptly change semiconductor state with metal at a critical  temperature θ = 68°C. This transition from reversible phase is carried out from a monoclinical structure characterizing its semiconductor state at low temperature towards the metal state of this material which becomes tétragonal rutile for  θ ˃ 68°C ; it is done during a few nanoseconds. Several studies were made on this material in a massive state and a thin layer. We will simulate by Maple the constant optics of a thin layer of VO₂ thickness z = 82 nm for the metal state according to the energy ω of the incidental photons in the energy interval: 0.001242 ≤ ω(ev) ≤ 6, from the infra-red (I.R) to the ultra-violet (U.V) so as to be able to control the various technological nano applications, like the detectors I.R or the U.V,  the intelligent windows to  increase  the energy efficiency in the buildings in order to save the cost of energy consumption by electric air-conditioning and the paintings containing nano crystals of this material. The constant optics, which we will simulate, is: the index of refraction, the reflectivity, the transmittivity, the coefficient of extinction, the dielectric functions ԑ₁ real part and  ԑ₂  imaginary part of the permittivity complexes ԑ of this material and the coefficient absorption. 

Optical properties of the Vanadium dioxide

2015 ◽  
Vol 8 (2) ◽  
pp. 2148-2155 ◽  
Author(s):  
Abderrahim Benchaib ◽  
Abdesselam Mdaa ◽  
Izeddine Zorkani ◽  
Anouar Jorio
Keyword(s):  
Energy Efficiency ◽  
Optical Properties ◽  
Critical Temperature ◽  
Thin Layer ◽  
Dielectric Function ◽  
Vanadium Dioxide ◽  
Ultra Violet ◽  
Index Of Refraction ◽  
Practical Utility ◽  
Infra Red

The vanadium dioxide is a material thermo chromium which sees its optical properties changing at the time of the transition from the phase of semiconductor state ↔ metal, at a critical temperature of 68°C. The study of the optical properties of a thin layer of VO₂ thickness 82 nm, such as the dielectric function, the index of refraction, the coefficient ofextinction, the absorption’s coefficient, the reflectivity, the transmittivity, in the photonic spectrum of energy ω located inthe interval: 0.001242 ≤ ω (ev) ≤ 6, enables us to control well its practical utility in various applications, like the intelligentpanes, the photovoltaic, paintings for increasing energy efficiency in buildings, detectors of infra-red (I.R) or ultra-violet(U.V). We will make simulations with Maple and compare our results with those of the literature

Optical Switching of Coherent VO2 Precipitates Embedded in Sapphire

1995 ◽  
Vol 396 ◽  
Author(s):  
L. A. Gea ◽  
L. A. Boatner ◽  
J. D. Budai ◽  
R. A. Zuhr
Keyword(s):  
Phase Transition ◽  
Vanadium Dioxide ◽  
Thermal Processing ◽  
Optical Switching ◽  
Optical Transmission ◽  
Structural Phase ◽  
Switching Behavior ◽  
New Type ◽  
Single Crystal Sapphire ◽  
Smart Surface

AbstractIn this work, we report the formation of a new type of active or “smart” surface that is produced by ion implantation and thermal processing. By co-implanting vanadium and oxygen into a single-crystal sapphire substrate and annealing the system under appropriate conditions, it was possible to form buried precipitates of vanadium dioxide that were crystallographically oriented with respect to the host AI2O3 lattice. The implanted VO2 precipitate system undergoes a structural phase transition that is accompanied by large variations in the optical transmission which are comparable to those observed for thin films of VO2 deposited on sapphire. Co-implantation with oxygen was found to be necessary to ensure good optical switching behavior.

Ordered Hybrid Metamaterial of La0.7Sr0.3MnO3-Au Vertically Aligned Nanocomposites Achieved on Templated SrTiO3 Substrate

2021 ◽  
pp. 100121
Author(s):  
Juanjuan Lu ◽  
Robynne L. Paldi ◽  
Yash Pachaury ◽  
Di Zhang ◽  
Han Wang ◽  
...  
Keyword(s):  
Srtio3 Substrate ◽  
Vertically Aligned ◽  
Hybrid Metamaterial
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