Tunable Near-Infrared Gires-Tournois Resonators Based on Vanadium Dioxide on Gold Film

This work serves as a roadmap for the development of a Vanadium dioxide (VO2)–Iridium composite based on the self-assembly of closely packed colloidal polystyrene microspheres (P-spheres) coupled with a Pulsed Laser Deposition (PLD) process. The self-assembly of a monolayer of PS is performed on an Al2O3-c substrate, using an adapted Langmuir–Blodgett (LB) process. Then, on the substrate covered with P-spheres, a 50-nanometer Iridium layer is deposited by PLD. The Iridium deposition is followed by the removal of PS with acetone, revealing an array of triangular shaped metallic elements formed on the underlaying substrate. In a last deposition step, 50-, 100- and 200-nanometer thin films of VO2 are deposited by PLD on top of the substrates covered with the Iridium quasi-triangles, forming a composite. Adapting the size of the P-spheres leads to control of both the size of the Iridium micro-triangle and, consequently, the optical transmittance of the composite. Owing to their shape and size the Iridium micro-triangles exhibit localized surface plasmon resonance (LSPR) characterized by a selective absorption of light. Due to the temperature dependent properties of VO2, the LSPR properties of the composite can be changeable and tunable.

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Photocurrent generation of a porphyrin self-assembly monolayer on a gold film electrode by surface plasmon excitation using near-infrared light

Chemical Physics Letters ◽

10.1016/s0009-2614(00)00393-6 ◽

2000 ◽

Vol 322 (3-4) ◽

pp. 242-246 ◽

Cited By ~ 20

Author(s):

Akito Ishida ◽

Tetsuro Majima

Keyword(s):

Surface Plasmon ◽

Self Assembly ◽

Near Infrared ◽

Gold Film ◽

Infrared Light ◽

Film Electrode ◽

Plasmon Excitation ◽

Near Infrared Light ◽

Photocurrent Generation ◽

Surface Plasmon Excitation

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Vanadium Dioxide Thin Films Deposited on TiO2 Buffer Layer for Smart Thermochromic Glazing of Windows

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.374-377.1365 ◽

2011 ◽

Vol 374-377 ◽

pp. 1365-1368 ◽

Cited By ~ 2

Author(s):

Jian Wei Ma ◽

Gang Xu ◽

Lei Miao

Keyword(s):

Thin Films ◽

Film Thickness ◽

Buffer Layer ◽

Quartz Glass ◽

Vanadium Dioxide ◽

Near Infrared ◽

Rf Magnetron Sputtering ◽

Infrared Region ◽

Glass Substrates ◽

Different Color

Vanadium dioxide (VO2) films were prepared on quartz glass and TiO2-coated quartz glass substrates by reactive RF-magnetron sputtering. The VO2 thin film with film thickness of 50 nm deposited on quartz glass substrates showed two kinds of regions with different color visible to the naked eye, i.e., the earth yellow region and the cyan region. Both XRD and Raman spectroscopy showed that the different color regions of the films had the different crystallinity quality and phase composition. Whereas, the VO2 thin films with film thickness of 50 nm fabricated on TiO2-coated quartz glass (with TiO2 film thickness of 50 nm) had uniform color and exhibited a larger change in transmittance at near infrared region than the VO2 thin films deposited on quartz glass did. A TiO2 buffer layer improved the crystallinity and uniformity of the VO2 film. Such very thin VO2 films with a TiO2 buffer layer have high potential for practical application in smart thermal glazing of windows.

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Low-Temperature Synthesis of Vanadium Dioxide Thin Films by Sol-Gel Dip Coating Method

Journal of Nanotechnology ◽

10.1155/2021/4868152 ◽

2021 ◽

Vol 2021 ◽

pp. 1-7

Author(s):

Ladawan Chotirat ◽

Sutham Niyomwas ◽

Witthawat Wongpisan ◽

Sitthisuntorn Supothina

Keyword(s):

Thin Films ◽

Low Temperature ◽

Vanadium Dioxide ◽

Near Infrared ◽

Sol Gel ◽

Optical Transmittance ◽

Dip Coating ◽

Tube Furnace ◽

Vacuum Tube ◽

Synthesis Conditions

The vanadium dioxide (VO2) thin films were synthesized by sol-gel dipping on a glass slide substrate at low temperature of 500°C in a vacuum tube furnace at a pressure of 2 × 10−3 mbar by 2-step calcination without an intermediate gas purging. Synthesis conditions, including temperature, vacuum pressure, and calcination steps in the vacuum tube furnace, were investigated to find the optimum condition that promoted the formation of VO2 phase. It was found that the 2nd calcination step was very important in realizing the monoclinic vanadium dioxide (VO2 (M)). The results of the valence electron analysis revealed the outstanding phase of VO2 and a small amount of V2O5 and V2O3 phases. The small crystallites of the VO2 were homogeneously distributed on the surface, and the grain was of an irregular shape of ∼220−380 nm in size. The film’s thickness was in a range of 69−74 nm. The film exhibited a metal-to-insulator transformation temperature of ∼68oC and good thermochromic property. Visible optical transmittance remained at ∼40−50% when the sample’s temperature changed from 25 to 80°C for a near infrared (NIR) region.

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High spatial resolution recording of near-infrared hologram based on photo-induced phase transition of vanadium dioxide film

Optics Letters ◽

10.1364/ol.40.001595 ◽

2015 ◽

Vol 40 (7) ◽

pp. 1595 ◽

Cited By ~ 1

Author(s):

Xiubao Sui ◽

Junjie Zeng ◽

Qian Chen ◽

Guohua Gu

Keyword(s):

Phase Transition ◽

Spatial Resolution ◽

Vanadium Dioxide ◽

Near Infrared ◽

High Spatial Resolution ◽

Vanadium Dioxide Film ◽

Dioxide Film

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The effects of thermochromic pigments on optical, mechanical, and heat insulation properties of plasticized PVC window film

Journal of Thermoplastic Composite Materials ◽

10.1177/0892705718820392 ◽

2019 ◽

Vol 33 (9) ◽

pp. 1196-1216 ◽

Cited By ~ 1

Author(s):

Thamolchanok Sakuldeemeekiat ◽

Natchaya Luamsri ◽

Jatuphorn Wootthikanokkhan ◽

Manisara Phiriyawirut

Keyword(s):

Vanadium Dioxide ◽

Near Infrared ◽

Heat Insulation ◽

Plasticized Pvc ◽

Poly Vinyl Chloride ◽

Light Region ◽

Pvc Film ◽

Different Types ◽

Infrared Wave ◽

Thermal Stability Of

In this study, a feasibility for developing window films for energy efficiency in building based on poly(vinyl chloride) (PVC) composite was explored, using two different types of thermochromic pigments, such as vanadium dioxide (VO2) and thermoreversal-40. Using VO2, tensile properties of the PVC film improved, accompanied with an increase of percentage gelation of PVC. On the other hand, thermochromic behaviors, in the visible light region of the PVC/thermoreversal-40 film, were more obvious than those of the PVC/VO2 analog. The percentage of transmittance of the near infrared wave through the PVC/VO2 film was much lower than that transmitted through the PVC/thermoreversal-40 film. The above improvement was achieved at the expense of the thermal stability of the PVC film.

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