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.

Nanopattern enabled terahertz all-optical switching on vanadium dioxide thin film

2011 ◽  
Vol 98 (7) ◽  
pp. 071105 ◽  
Author(s):  
S. B. Choi ◽  
J. S. Kyoung ◽  
H. S. Kim ◽  
H. R. Park ◽  
D. J. Park ◽  
...  
Keyword(s):  
Thin Film ◽  
Vanadium Dioxide ◽  
Optical Switching ◽  
All Optical ◽  
All Optical Switching

Two-step hydrothermal growth of a thin film of vanadium dioxide on sapphire with large terahertz modulation depth

2019 ◽  
Vol 125 (16) ◽  
pp. 163104 ◽  
Author(s):  
Rui-ke Wang ◽  
Hai Wang ◽  
Zhi-qiang An ◽  
Jing-suo He ◽  
Cun-lin Zhang ◽  
...  
Keyword(s):  
Thin Film ◽  
Vanadium Dioxide ◽  
Modulation Depth ◽  
Hydrothermal Growth

scholarly journals Gold Coated VO2 Nanogratings Based Plasmonic Switches

2022 ◽  
Vol 19 (1) ◽  
pp. 1721
Author(s):  
Priyanka Bhardwaj ◽  
Manidipa Roy ◽  
Sanjay Kumar Singh
Keyword(s):  
Optical Switching ◽  
Optical Switch ◽  
Field Enhancement ◽  
Metallic Phase ◽  
Ir Radiation ◽  
Fast Switching ◽  
Rigorous Coupled Wave Analysis ◽  
Current State ◽  
Plasmonic Switch ◽  
Rigorous Coupled Wave

This paper presents 2 dimensional (2D) and 1 dimensional (1D) gold (Au) coated VO2 (Vanadium Dioxide) nanogratings based tunable plasmonic switch. VO2 is a phase changing material and hence exhibits phase transition from semiconductor to metallic phase approximately at 67 ºC or 340 K (critical temperature) which can be achieved by exposure to IR radiation, application of voltage, heating, etc. and there is a huge contrast between optical properties of its metallic and insulating phases and hence that can be utilized to implement VO2 based optical switches. These VO2 based gratings couple the incident optical radiation to plasmonic waveguide modes which in turn leads to high electromagnetic field enhancement in the gaps between the nanogratings. The proposed Au coated VO2 nanogratings can be fabricated by using current state of art fabrication techniques and provides switchability of the order of femtoseconds. Hence the optical switching explained in our paper can be used fast switching applications. For an optimum switch our aim is to maximize its differential reflectance spectra between the 2 states of VO2, i.e., metallic and semiconductor phases. Rigorous Coupled Wave Analysis (RCWA) reveals that wavelengths for maximum differential reflectance can be optimized over a large spectral regime by varying various parameters of nanogratings for example groove height (h), width (w), gap (g) between the gratings, and thickness (t) of Au coating over VO2 by simulation using RCWA for maximum differential reflectance between VO2 metal and semiconductor phase, i.e., the switching wavelengths can be tuned by varying grating parameters and thus we can have optimum optical switch.

All-Optical Switching in Ultrashort Photonic Crystal Couplers Modified Y-branch Structure

2015 ◽  
Vol 36 (3) ◽  
Author(s):  
Masoud Zahravi ◽  
Mitra Zahravi ◽  
Hamed Alipour-Banaei
Keyword(s):  
Photonic Crystal ◽  
Optical Switching ◽  
Optical Switch ◽  
Fdtd Method ◽  
Wavelength Division ◽  
All Optical ◽  
Channel Wavelength ◽  
All Optical Switch ◽  
Difference Time ◽  
All Optical Switching

AbstractIn this paper, an all-optical switch based on photonic crystal directional coupler has been simulated and analyzed by the finite difference time domain (FDTD) method. An ultra small 3-channel wavelength division demultiplexer based on 2D photonic crystal was modified into all-optical switch suitable for integration. The output wavelengths of designed structure can be tuned for communication applications (around 1.5 µm, 1.4 µm, 1.3 µm) by locating suitable defect parameters in the corner of each resonance cavity and input waveguides. The bandwidth of each channel is about 1 nm.

Optical Switching and Photoluminescence in Erbium Implanted Vanadium Dioxide Thin Films

2013 ◽  
Vol 1577 ◽  
Author(s):  
Herianto Lim ◽  
Nikolas Stavrias ◽  
Jeffrey C. McCallum ◽  
Robert E. Marvel ◽  
Richard F. Haglund
Keyword(s):  
Vanadium Dioxide ◽  
Optical Switching ◽  
Optical Switch ◽  
Optical Amplifier ◽  
Optical Amplification ◽  
Fiber Optic Communication ◽  
Two Phases ◽  
Optic Communication ◽  
Post Implantation ◽  
Vanadium Dioxide Thin Films

ABSTRACTVanadium dioxide (VO2) is a promising material for an optical switch due to the ultrafast and reversible transition between its two phases with contrasting optical, as well as electronic, properties. Meanwhile, erbium (Er3+) has been a standard optical amplifier for the current fiber-optic communication system. Hence, a combination of the two could be expected to make an optical switch capable of simultaneous optical amplification. In the present work, the optical switching and photoluminescence of Er-implanted VO2 were successfully demonstrated. Post-implantation annealing at 800°C or above was seen crucial for the activation of the Er centers in the VO2 crystals.

Ultrafast optical switching based on mutually enhanced resonance modes in gold nanowire gratings

Nanoscale ◽  
2019 ◽  
Vol 11 (38) ◽  
pp. 17807-17814 ◽  
Author(s):  
Yan Wang ◽  
Xinping Zhang
Keyword(s):  
Optical Switching ◽  
Modulation Depth ◽  
Optical Switch ◽  
Gold Nanowires ◽  
Gold Nanowire ◽  
Ultrafast Optical ◽  
Resonance Modes ◽  
Thick Gold

An optical switch as fast as 290 fs using thick gold nanowires to achieve a modulation depth of >16%.

Study on infrared optical switching of vanadium dioxide thin film

2009 ◽  
Author(s):  
Haifang Wang ◽  
Yi Li ◽  
Xiaojing Yu ◽  
Huiqun Zhu ◽  
Yize Huang ◽  
...  
Keyword(s):  
Thin Film ◽  
Vanadium Dioxide ◽  
Optical Switching

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.

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