Deep UV light sensitive Zn1−x−y Mg x Al y O films with fast photoelectric response for SAW photodetectors

Kutepov, M. E.; Kaydashev, V. E.; Karapetyan, G. Ya.; Minasyan, T. A.; Chernyshev, A. V.; Абдулвахидов, К. Г.; Shevtsova, S. I.; Glazunova, E. V.; Irkha, V. A.; Кайдашев, Е. М.

doi:10.1088/1361-665x/ab19d5

Cited by 3 publications

(3 citation statements)

References 21 publications

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“…However, if the initial conductivity of a VO 2 film prepared in some special conditions is smaller than σ M , the attenuation could grow with increased conductivity. More information about similar phenomena may be found in our previous reports on SAW propagating in Zn(Mg, Al)O and ZnO films [ 25 , 26 ].…”

Section: Discussionsupporting

confidence: 72%

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Photothermal Effect and Phase Transition in VO2 Enhanced by Plasmonic Particles

et al. 2023

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Phase change metasurfaces based on VO2, which are pre-heated with electric current and optically addressed by projected structured light hologram, are considered to become a new paradigm in programmed THz/middle IR flat optics. Macroscopic quasi-homogeneous arrays of Au nanoparticles show large near IR absorption and a significant photothermal effect capable of boosting a light-triggered switching of VO2 and are to be carefully examined. We propose a new approach to simultaneously probe the altered temperature and electric conductivity of a hybrid Au particle-VO2 film composite by monitoring a phase shift and attenuating a surface acoustic wave in a YX128° cut LiNbO3 substrate. The method shows a temperature resolution of 0.1 °C comparable with the best existing techniques for studying nanoobjects and surfaces. The laser-induced photothermal effects were characterized in a macroscopic array of Au nanostars (AuNSts) with different surface coverage. In a monolayer of 10 nm Au, coupled plasmonic nanoparticles were deposited on the LiNbO3 substrate. An optically triggered insulator-metal transition assisted by photothermal effect in AuNSts/VO2/TiO2/LiNbO3 composites was studied at varied light power. We believe that the proposed SAW-based method is of significant importance for the characterization and optimization of radiation absorbing or/and electrically heated elements of metasurfaces and other devices for lab-on-chip and optical communication/processor technology.

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Section: Discussionsupporting

confidence: 72%

“…A photothermal effect in nanoparticles induced by laser radiation and MIT in VO 2 film is accurately characterized in this manner. Previously, a simplified version of this setup was used by us to monitor the conductivity alteration in ZnO and Zn(Mg,Al)O films under deep UV/UV radiation exposure [ 25 , 26 ].…”

Section: Methodsmentioning

confidence: 99%

Photothermal Effect and Phase Transition in VO2 Enhanced by Plasmonic Particles

et al. 2023

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“…Once the sensor requirements such as flexibility, sensitivity, detection range, response time, and form factors are finalised, the UV light detection technology can be determined. Photodiodes ( Liu et al, 2021 ), phototransistors ( Xie C. et al, 2020 ), and UV-sensitive films ( Kutepov et al, 2019 ) are examples. UV-sensitive films can be a good option because they can conform to different shapes in this regard.…”

Section: Touchless Sensing Technologies In Soft Roboticsmentioning

confidence: 99%

Soft touchless sensors and touchless sensing for soft robots

Sirithunge,

Wang,

Iida

2024

Front. Robot. AI

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Soft robots are characterized by their mechanical compliance, making them well-suited for various bio-inspired applications. However, the challenge of preserving their flexibility during deployment has necessitated using soft sensors which can enhance their mobility, energy efficiency, and spatial adaptability. Through emulating the structure, strategies, and working principles of human senses, soft robots can detect stimuli without direct contact with soft touchless sensors and tactile stimuli. This has resulted in noteworthy progress within the field of soft robotics. Nevertheless, soft, touchless sensors offer the advantage of non-invasive sensing and gripping without the drawbacks linked to physical contact. Consequently, the popularity of soft touchless sensors has grown in recent years, as they facilitate intuitive and safe interactions with humans, other robots, and the surrounding environment. This review explores the emerging confluence of touchless sensing and soft robotics, outlining a roadmap for deployable soft robots to achieve human-level dexterity.

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Optimizing VO₂ film properties for use in SAW devices

et al. 2021

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The aim of this study is to optimize the conditions for producing thin VO2 films for their use in SAW devices. We used the pulsed laser deposition (PLD) method to produce VO2 films. We used a metallic vanadium target. The dependence of the oxygen pressure during PLD on the resistive metal–insulator transition (MIT) on substrates of [Formula: see text]-sapphire and LiNbO3 YX/128[Formula: see text] was studied. The resulting films had sharp metal–insulator temperature transitions on [Formula: see text]-Al2O3. The most high-quality films showed resistance change by four orders of magnitude. At the lower point of the hysteresis, the resistance of these samples was in the range of 50–100 [Formula: see text]. The synthesized VO2 films had a sharp temperature transition and a relatively small width of thermal hysteresis. The SAW damping during its passage through a VO2/ZnO/LiNbO3 YX/128[Formula: see text] film at the metal–insulator phase transition temperature was studied. Attenuation SAW decreases with increasing temperature from 52 dB/cm to 0 dB/cm.

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Deep UV light sensitive Zn_1−x−yMg _x Al _y O films with fast photoelectric response for SAW photodetectors

Cited by 3 publications

References 21 publications

Photothermal Effect and Phase Transition in VO2 Enhanced by Plasmonic Particles

Photothermal Effect and Phase Transition in VO2 Enhanced by Plasmonic Particles

Soft touchless sensors and touchless sensing for soft robots

Optimizing VO₂ film properties for use in SAW devices

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Deep UV light sensitive Zn1−x−y Mg x Al y O films with fast photoelectric response for SAW photodetectors

Cited by 3 publications

References 21 publications

Photothermal Effect and Phase Transition in VO2 Enhanced by Plasmonic Particles

Photothermal Effect and Phase Transition in VO2 Enhanced by Plasmonic Particles

Soft touchless sensors and touchless sensing for soft robots

Optimizing VO2 film properties for use in SAW devices

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Product

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Deep UV light sensitive Zn_1−x−yMg _x Al _y O films with fast photoelectric response for SAW photodetectors

Optimizing VO₂ film properties for use in SAW devices