Optical limitation of Mid-IR radiation in vanadium dioxide films

Danilov, O. B.; Klimov, V. A.; Mikheeva, O. P.; Sidorov, A. I.; Tul'skii, Stanislav A.; Shadrin, E. B.; Yachnev, I. L.

doi:10.1134/1.1538731

Cited by 22 publications

(8 citation statements)

References 9 publications

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“…The hysteresis loops in a measured area can be constructed by summing all the elementary loops of the grains in the area. 16,21 Indeed, for free-standing single-crystalline VO 2 nanostructures or isolated nanoparticles on a Si substrate, the effect of size reduction on T c depression and hysteresis broadening is convincingly reported. [22][23][24] Nevertheless, this effect seems to be notably weakened for VO 2 aggregations/films consisting of grains with similar dimensions.…”

Section: Introductionmentioning

confidence: 91%

Effects of Annealing Parameters on Optical Properties of Thermochromic VO₂ Films Prepared in Aqueous Solution

et al. 2010

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This work confirmed experimentally that the microstructure (grain boundaries, grain sizes, and size distributions) of VO 2 films has significant effects on the features of the semiconductor-metal (S-M) transition. This feature enables us to wisely regulate the parameters of the phase transition, which is of great importance in achieving practical applications. Thermochromic VO 2 films with various optical properties and phase transition parameters (for example: hysteresis widths ranging from 12 to 50 °C) have been synthesized on fused silica substrates via a simple solution process with inorganic precursors and polyvinylpyrrolidone (PVP). The widths and slopes of the hysteresis loops (i.e., the temperature sensitivity of the transition) can be regulated by controlling grain sizes and grain boundary conditions, which are believed to dominate the generation of the elementary hysteresis loop of each grain and the propagation of the S-M transition, respectively. A film consisting of qusai-isolated small particles shows a wide hysteresis loop due to the large interfacial energies and the lack of defects for nucleating. Besides, grain boundaries can decrease the interfacial energies and favor the phase propagation. In addition, particle sizes seem to influence the visible transmittances of these films effectively without deterioration of the infrared regulation ability. This experimental phenomenon is assigned to the blue shift of absorption edges (at around 500 nm) accompanying decreases in particle size.

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Section: Introductionmentioning

confidence: 91%

Effects of Annealing Parameters on Optical Properties of Thermochromic VO₂ Films Prepared in Aqueous Solution

et al. 2010

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“…Indeed, the limiting characteristics of VO 2 films based on this IMT are well known. [25,32,33] However, metal-phase VO 2 is not nearly as reflective as noble metals (e.g., gold and silver), [26,34] and therefore a nontrivial amount of incident power can still be absorbed by the metal-phase VO 2 .…”

Section: Design and Simulationmentioning

confidence: 99%

Ultrathin Broadband Reflective Optical Limiter

Wan

Zhang

Salman

et al. 2021

Laser & Photonics Reviews

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Optical limiters are nonlinear devices that feature decreasing transmittance with increasing incident optical intensity, and thus can protect sensitive components from high‐intensity illumination. The ideal optical limiter reflects rather than absorbs light in its active (“limiting”) state, minimizing risk of damage to the limiter itself. Previous efforts to realize reflective (rather than absorbing) limiters were based on embedding nonlinear layers into relatively thick multilayer photonic structures, resulting in substantial fabrication complexity, reduced speed and, in some instances, limited working bandwidth. In this paper, these tradeoffs are overcome by using the insulator‐to‐metal transition (IMT) in vanadium dioxide (VO2) to achieve intensity‐dependent modulation of resonant transmission through aperture antennas. Due to the large change of optical properties across the IMT, low‐quality‐factor resonators are sufficient to achieve high on–off ratios in the transmittance of the limiter. As a result, our ultrathin reflective limiter (thickness ≈1/100 of the free‐space wavelength) is broadband in terms of operating wavelength (>2 µm at 10 µm) and angle of incidence (up to ≈50° away from the normal). Our analysis of the experimental results via opto‐thermal simulations provides insight into limiter performance and is a useful guidance for further engineering efforts.

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“…This has caused researchers to devote close attention to this material and its use in optics and electronics. Polycrystalline VO 2 films have been used in electronic devices, 1 in IR visualizers, 2 in nonlinear-optical radiation limiters, 3 as media for recording holograms, 4 and in mirrors with controllable reflectance. 5 The rate of the PT caused by temperature variation is small and is determined by thermal inertia.…”

Section: Introductionmentioning

confidence: 99%

Attenuation modulation of guided modes in optical fibers with a coating based on vanadium dioxide

2013

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This paper presents the results of experimental and theoretical studies of the optical characteristics of fibers made from silicate glasses with coatings in the form of a polycrystalline film or nanoparticles of vanadium dioxide in the wavelength range 0.8-1.8 μm. It is shown that the variation of the optical properties of the coating with temperature causes efficient attenuation modulation of the optical signal in the fiber. The modulation depth in fibers with a nanocomposite coating is a factor of 3-4 times greater than in fibers with a thin-film coating. This is because plasma resonance is present in nanoparticles of vanadium dioxide in the metallic phase.

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Optical limitation of Mid-IR radiation in vanadium dioxide films

Cited by 22 publications

References 9 publications

Effects of Annealing Parameters on Optical Properties of Thermochromic VO₂ Films Prepared in Aqueous Solution

Effects of Annealing Parameters on Optical Properties of Thermochromic VO₂ Films Prepared in Aqueous Solution

Ultrathin Broadband Reflective Optical Limiter

Attenuation modulation of guided modes in optical fibers with a coating based on vanadium dioxide

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Optical limitation of Mid-IR radiation in vanadium dioxide films

Cited by 22 publications

References 9 publications

Effects of Annealing Parameters on Optical Properties of Thermochromic VO2 Films Prepared in Aqueous Solution

Effects of Annealing Parameters on Optical Properties of Thermochromic VO2 Films Prepared in Aqueous Solution

Ultrathin Broadband Reflective Optical Limiter

Attenuation modulation of guided modes in optical fibers with a coating based on vanadium dioxide

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Product

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Effects of Annealing Parameters on Optical Properties of Thermochromic VO₂ Films Prepared in Aqueous Solution

Effects of Annealing Parameters on Optical Properties of Thermochromic VO₂ Films Prepared in Aqueous Solution