Dr. Ya Qiao Profile

Dr. Ya Qiao

at Electronic Engineering Institute

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Publications (6)

Proceedings Article | 9 December 2021 Paper

Design and its electromagnetic properties of low emissivity selective radiators in middle and far infrared bands

Yuan Lu, Xianyu Shen, Yunsong Feng, Ya Qiao

Proceedings Volume 12030, 120301B (2021) https://doi.org/10.1117/12.2617413

KEYWORDS: Infrared radiation, FSS based metamaterials, Electromagnetic radiation, Reflection, Radiation effects, Far infrared, Electromagnetism, Reflectivity, Mid-IR, Laser applications

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Proceedings Article | 5 November 2020 Paper

Study on infrared radiation characteristics of periodic single-screen ring selective radiator

Yuan Lu, Yunsong Feng, LeiLei Chen, Xianyu Shen, Chang Wu, Ya Qiao

Proceedings Volume 11566, 1156609 (2020) https://doi.org/10.1117/12.2575730

KEYWORDS: Transmittance, Infrared radiation, Electromagnetic radiation, Terahertz radiation, Solar energy, Reflection, Solar radiation, Metamaterials, Electromagnetism

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SPIE Journal Paper | 30 September 2015

Modified iterative algorithm for the design of wide-diffraction angle diffraction optical element

Xiangbo Lv, Qiang Song, Denggao Li, Ya Qiao, Yuan Lu, Jing Zhu, Huijie Huang

OE, Vol. 54, Issue 09, 093106, (September 2015) https://doi.org/10.1117/12.10.1117/1.OE.54.9.093106

KEYWORDS: Diffraction, Detection and tracking algorithms, Diffractive optical elements, Optical design, Optical components, Spatial frequencies, Binary data, Optical engineering, Interference (communication), Computer simulations

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Proceedings Article | 17 September 2013 Paper

The mechanism of laser disturbing infrared detector and its intelligent protection

Yuan Lu, Yun-song Feng, Yong-shun Ling, Ya Qiao

Proceedings Volume 8904, 89040T (2013) https://doi.org/10.1117/12.2033587

KEYWORDS: Sensors, Mercury cadmium telluride, Laser energy, High power lasers, Thin films, Infrared detectors, Laser induced damage, Vanadium, Plasma, Oxides

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Interference mechanism of laser disturbing infrared detector is analyzed. The disturbing grade was separated into four levels according to interference effect. The levels are saturation, melting, vaporization and plasma. The responsivity of a detector will drop and it can’t work effectively when it was saturated. Its performance wills recovery when the interference disappeared. Melting, Vaporization and plasma will lead to permanent damage. The main damage to detector is thermal damage for induced laser. The reason is that the detector will melt or evaporate when it absorbed the energy of induced laser. For HgCdTe detector, the damage appeared as Hg precipitation. It appeared as In exfoliated from welding outlet line of HgCdTe crystal or HgCdTe melting when the temperature of detector is higher. Since Vanadium Oxide has reversible transformation characteristic between semi-conductor, metal and insulator, it can be used to protect detector from laser damage. Vanadium Oxide can be made as thin film coatings on optical system to protect the detector. the phase transformation point temperature of VO₂ is 68°C,a few doping method can decrease the transformation temperature. These mean that less energy can make VO₂ film’s temperature increase to transformation point. VO₂ film protecting HgCdTe detector was used as an example to estimate the protection effect. For an HgCdTe detector, its responsivity will drop two orders of magnitude when its temperature raises 70K. This case be regard as that the detector was disturbed. When a CO₂ pulsed laser beam with 0.1μ s∼10μs pulse width was incidence an HgCdTe detector, its heat conduction depth is 0.32∼3.2μm and its thermal diffusion can be ignored. The damage energy density threshold value is E_in=1.55J/cm². When CO₂ pulsed laser beam incidence the detector through certain thickness VO₂ film, the VO₂ film will has transformed from semiconductor state to metallic state before the laser beam damage the detector. The energy of the laser beam will be total reflected. VO₂ can be used as an intelligent preventer to protect detector against laser.

Proceedings Article | 11 September 2013 Paper

A new method of NIR face recognition using kernel projection DCV and neural networks

Ya Qiao, Yuan Lu, Yun-song Feng, Feng Li, Yongshun Ling

Proceedings Volume 8907, 89071M (2013) https://doi.org/10.1117/12.2032609

KEYWORDS: Near infrared, Facial recognition systems, Neural networks, Feature extraction, Imaging systems, Databases, Visible radiation, Lamps, Detection and tracking algorithms, Light emitting diodes

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Proceedings Article | 11 September 2013 Paper

Influence of ejector technique on infrared radiation of the exhaust plume outside rectangular nozzle

Yunsong Feng, Yuan Lu, Ya Qiao

Proceedings Volume 8907, 89072O (2013) https://doi.org/10.1117/12.2033074

KEYWORDS: Infrared radiation, Statistical modeling, 3D modeling, Absorption, Solids, Thermal modeling, Computer simulations, Numerical analysis, Combustion, Carbon dioxide

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Showing 5 of 6 publications

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