Prof. Yan Zhang Profile

Prof. Yan Zhang

at Capital Normal Univ

SPIE Involvement:

Conference Program Committee | Author | Student Chapter Advisor

Publications (38)

Proceedings Article | 27 November 2023 Poster + Paper

All dielectric metasurface-based diffractive neural networks all optical computing

Yufei Liu, Weizhu Chen, Yan Zhang

Proceedings Volume 12768, 127682B (2023) https://doi.org/10.1117/12.2688132

KEYWORDS: Neural networks, Neurons, Dielectrics, Optical computing, Diffraction, Design and modelling, Smart sensors, Robotics, Phase shift keying, Phase modulation

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Proceedings Article | 26 November 2023 Poster + Paper

Graphene-based terahertz bias-driven negative-conductivity metasurface

Guibin Li, Guocui Wang, Jingling Shen, Bo Zhang, Yan Zhang

Proceedings Volume 12776, 1277614 (2023) https://doi.org/10.1117/12.2687607

KEYWORDS: Terahertz radiation, Graphene, Monolayers, Electrical conductivity, Split ring resonators, Capacitance, Finite-difference time-domain method, Absorption, Resonance enhancement

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Proceedings Article | 23 July 2022 Paper

Terahertz focusing enhancement for graphene-based tunable metalens

Jianzhou Huang, Bin Hu, Guocui Wang, Weiguang Liu, Zongyuan Wang, Yan Zhang, Juan Liu

Proceedings Volume 12277, 1227714 (2022) https://doi.org/10.1117/12.2618749

KEYWORDS: Graphene, Antennas, Terahertz radiation, Modulation, Photonics, Gold, Polarization, Phase modulation, Geometrical optics, Plasmonics

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Proceedings Article | 23 July 2022 Paper

Dynamically control of THz wave polarization state based on a graphene composite metasurface

Guocui Wang, Bin Hu, Muhammad Ismail Khan, Yan Zhang

Proceedings Volume 12277, 1227712 (2022) https://doi.org/10.1117/12.2617750

KEYWORDS: Polarization, Terahertz radiation, Graphene, Elliptical polarization, Composites, Gold, Wave plates, Modulation, Control systems, Optical spheres

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Proceedings Article | 8 July 2022 Paper

Optical constants of lactose pumped by strong terahertz waves

Jialing Zhang, Wenfeng Sun, Xinke Wang, Peng Han, Shengfei Feng, Jiasheng Ye, Yan Zhang

Proceedings Volume 12284, 1228406 (2022) https://doi.org/10.1117/12.2612134

KEYWORDS: Refractive index, Crystals, Signal attenuation, Polarization, Absorption, Transmittance, Optical properties, Beam splitters, Terahertz spectroscopy, Terahertz technology

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Proceedings Article | 12 January 2018 Paper

Integrated Mach-Zehnder interferometer on the end facet of multicore fiber for refractive index sensing application

Yanwen Qi, Siyao Zhang, Shengfei Feng, Xinke Wang, Wenfeng Sun, Jiasheng Ye, Peng Han, Yan Zhang

Proceedings Volume 10623, 106230T (2018) https://doi.org/10.1117/12.2302441

KEYWORDS: Sensors, Optical fibers, Refractive index, Bridges, Mach-Zehnder interferometers, Liquids, Fiber optics sensors, Reflection, Gold, Molecular bridges

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Proceedings Article | 26 June 2017 Paper

Digital metasurface for wavefront modulation

Yan Zhang

Proceedings Volume 10335, 103350N (2017) https://doi.org/10.1117/12.2268981

KEYWORDS: Digital holography, Digital modulation, Amplitude modulation, Holograms, Antennas, Wavefronts, Modulation, Phase shift keying, Phase modulation, Polarization

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Proceedings Article | 3 November 2016 Paper

Terahertz beam shaping with metasurface

Jingwen He, Sen Wang, Yan Zhang

Proceedings Volume 10030, 1003019 (2016) https://doi.org/10.1117/12.2246988

KEYWORDS: Beam shaping, Terahertz radiation, Antennas, Lens design, Modulation, Holography, Imaging systems, Phase shift keying, Spatial light modulators, Optical design

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Proceedings Article | 3 November 2016 Paper

Spectra modulation of terahertz radiation from air plasma

Ying Zhang, Wenfeng Sun, Yan Zhang

Proceedings Volume 10030, 1003025 (2016) https://doi.org/10.1117/12.2246085

KEYWORDS: Terahertz radiation, Modulation, Plasma, Plasma generation, Polarization, Superposition, Semiconducting wafers, Solids, Terahertz technology, Crystals

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Proceedings Article | 3 November 2016 Paper

Terahertz wavelength encoding compressive imaging

Qiong Zhang, Xinke Wang, Yan Zhang

Proceedings Volume 10030, 100302A (2016) https://doi.org/10.1117/12.2246268

KEYWORDS: Terahertz radiation, Sensors, Compressive imaging, Computer programming, Fourier transforms, Signal detection, Numerical simulations, Imaging systems, Spatial frequencies, Laser beam diagnostics

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Proceedings Article | 5 November 2015 Paper

Polarization-dependent focusing of terahertz surface plasmon polaritons

Sen Wang, Xinke Wang, Yan Zhang

Proceedings Volume 9795, 97953K (2015) https://doi.org/10.1117/12.2214415

KEYWORDS: Spiral phase plates, Terahertz radiation, Imaging systems, Surface plasmon polaritons, Wave plates, Phase shifts, Metals, Laser beam diagnostics, Crystals, Finite-difference time-domain method

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Proceedings Article | 5 November 2015 Paper

Non-invasive detection of murals with pulsed terahertz reflected imaging system

Minjie Yuan, Wenfeng Sun, Xinke Wang, Jiasheng Ye, Sen Wang, Qunxi Zhang, Yan Zhang

Proceedings Volume 9795, 979534 (2015) https://doi.org/10.1117/12.2210740

KEYWORDS: Terahertz radiation, Imaging systems, Metals, 3D image processing, Tomography, Reflectivity, Laser beam diagnostics, Crystals, Imaging spectroscopy, Sensors

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Proceedings Article | 5 November 2015 Paper

Micro-antennas for the phase and amplitude modulation of terahertz wave

Jingwen He, Sen Wang, Yan Zhang

Proceedings Volume 9795, 979533 (2015) https://doi.org/10.1117/12.2209588

KEYWORDS: Antennas, Terahertz radiation, Modulation, Phase shift keying, Amplitude modulation, Finite-difference time-domain method, Modulators, Phase shifts, Optical antennas, Surface plasmons

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Proceedings Article | 12 August 2015 Paper

Investigating murals with terahertz reflective tomography

Minjie Yuan, Wenfeng Sun, Xinke Wang, Sen Wang, Qunxi Zhang, Jiasheng Ye, Yan Zhang

Proceedings Volume 9625, 962507 (2015) https://doi.org/10.1117/12.2190174

KEYWORDS: Terahertz radiation, Tomography, Reflectivity, Refractive index, Imaging spectroscopy, Imaging systems, Terahertz spectroscopy, Crystals, Laser beam diagnostics, Beam splitters

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Proceedings Article | 21 December 2013 Paper

Active terahertz holography

Zhenwei Xie, Xinke Wang, Yan Zhang

Proceedings Volume 9047, 90470B (2013) https://doi.org/10.1117/12.2038300

KEYWORDS: Terahertz radiation, Computer generated holography, Silicon, Semiconducting wafers, Wavefronts, Imaging systems, Beam controllers, Modulation, Spatial light modulators, Modulators

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Proceedings Article | 22 June 2013 Paper

Image encryption under spatially incoherent illumination

Zhenwei Xie, Jinliang Zang, Yan Zhang

Proceedings Volume 8769, 876920 (2013) https://doi.org/10.1117/12.2016641

KEYWORDS: Image encryption, Point spread functions, Charge-coupled devices, Image quality, Optical image encryption, Numerical simulations, Image processing, Spatial light modulators, Imaging systems, Light emitting diodes

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A novel method for image encryption under spatially incoherent illumination is proposed. The LED array is used as the spatially incoherent source. Both the encryption process and decryption process are numerically simulated. Experiments are carried out to demonstrate the basic ideal of the proposed method. The incoherent light is modulated by the spatial light modulator on the input plane as the input image to be encrypted. Then a random phase only mask is used as the key to encode the image, finally a Fourier lens is adopted to image the encrypted image on the output plane. The encrypted intensity distribution is recorded by a CCD. In the numerical simulations, the random phase only mask is generated by a rand function. The incoherent image is composed of many source points, and any two points of these sources are spatially incoherent, but each point is self-spatially coherent. Under this property, the point spread function for the encryption system can be considered as the interference of two beams, one is the spherical beam and the other is the random phase beam. Once the point spread function is given, the system’s optical transfer function can be calculated easily. Then the encryption system can be considered as a decryption system, and the output image is the same as the original image. The encrypted image can be calculated with the system’s optical transfer function and the output image. The random phase mask, the distance between the random phase mask and the SLM, and the wavelength of the laser can be seen as the keys of the encryption systems. Only when all these parameters are correct, can one get the right decrypted image. The factors which could affect the practical experiment, such as quantization noise and displacement tolerances are also investigated. Compared with the conventional coherent encryption system, the incoherent encryption system proposed in this paper is free of the flaws of the optical elements, the dust particles on the elements, and other unstable factors of the environment. What’s more, the cost of the incoherent encryption system is lower since only a phase only mask and a imaging lens are used.

Proceedings Article | 31 January 2013 Paper

Terahertz resonant transmission based on annular aperture arrays

Yan Zhang, Dan Hu

Proceedings Volume 8759, 87593D (2013) https://doi.org/10.1117/12.2014582

KEYWORDS: Terahertz radiation, Metals, Plasmonics, Modulation, Polarization, Silicon, Terahertz spectroscopy, Silicon films, Near field optics, Imaging spectroscopy

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Proceedings Article | 5 December 2012 Paper

Terahertz super thin planar lenses

Yan Zhang, Jiasheng Ye, Dan Hu, Xinke Wang, Shengfei Feng, Wenfeng Sun

Proceedings Volume 8562, 85620S (2012) https://doi.org/10.1117/12.999909

KEYWORDS: Terahertz radiation, Antennas, Lenses, Laser beam diagnostics, Polarization, Lens design, Optical components, Modulation, Imaging systems, Crystals

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Proceedings Article | 5 December 2012 Paper

A reflection sensor based on the Rayleigh anomaly of metallic grating in terahertz wave band

Lingyue Yue, Jingwen He, Shengfei Feng, Xingke Wang, Wenfeng Sun, Yan Zhang

Proceedings Volume 8562, 85621E (2012) https://doi.org/10.1117/12.999858

KEYWORDS: Terahertz radiation, Sensors, Gold, Refractive index, Water, Reflection, Diffraction gratings, Environmental sensing, Liquids, Nitrogen

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Proceedings Article | 15 October 2012 Paper

Amplitude-modulation mechanism for designing long-focal-depth cylindrical microlenses with a uniform axial intensity profile

Jia-Sheng Ye, Guo-Ai Mei, Yan Zhang

Proceedings Volume 8418, 841804 (2012) https://doi.org/10.1117/12.977271

KEYWORDS: Microlens, Bessel beams, Amplitude modulation, Diffraction, Phase modulation, Electromagnetic theory, Glasses, Micro optics, Micromirrors, Waveguides

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Proceedings Article | 16 November 2011 Paper

Rigorous electromagnetic analysis of metallic cylindrical focusing micromirrors designed by a modified focal-length function

Guo-Ai Mei, Jiasheng Ye, Yan Zhang

Proceedings Volume 8321, 83210U (2011) https://doi.org/10.1117/12.903890

KEYWORDS: Micromirrors, Microlens, Diffraction, Electromagnetism, Electromagnetic theory, Dielectrics, Reflectivity, System on a chip, Americium, Imaging spectroscopy

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Proceedings Article | 8 September 2011 Paper

Measurement of defect depth by peak second derivative method in pulse thermography

Lichun Feng, Ruigang He, Yan Zhang

Proceedings Volume 8193, 819333 (2011) https://doi.org/10.1117/12.900701

KEYWORDS: Thermography, Inspection, Data modeling, Temperature metrology, Thermal modeling, Nondestructive evaluation, 3D modeling, Modulation, Physics, Ultrasonics

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Proceedings Article | 29 December 2010 Paper

Directional design of optical lens based on metallic nano-slits with variant widths

Qiaofen Zhu, Yan Zhang

Proceedings Volume 7544, 754463 (2010) https://doi.org/10.1117/12.885557

KEYWORDS: Lens design, Optical design, Objectives, Finite-difference time-domain method, Metals, Thin films, Diffraction, Optical components, Structural design, Dielectrics

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Proceedings Article | 9 November 2010 Paper

Directional design of optical lens based on metallic nano-slits by Yang-Gu algorithm

Qiaofen Zhu, Yan Zhang

Proceedings Volume 7849, 78492O (2010) https://doi.org/10.1117/12.870531

KEYWORDS: Lens design, Spiral phase plates, Optical design, Optical components, Finite-difference time-domain method, Objectives, Modulation, Metals, Optoelectronics, Dielectrics

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Proceedings Article | 5 November 2010 Paper

Identification of ores and gems using THz polarization information

Zhi Yu, Ye Cui, Xinke Wang, Yan Zhang

Proceedings Volume 7854, 78541U (2010) https://doi.org/10.1117/12.870541

KEYWORDS: Terahertz radiation, Polarization, Imaging systems, Laser beam diagnostics, Absorption, Refractive index, Ruby, Electro optics, Minerals, X-rays

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Proceedings Article | 5 November 2010 Paper

Continuous wave terahertz phase imaging

Wenfeng Sun, Xinke Wang, Ye Cui, Yan Zhang

Proceedings Volume 7854, 78543A (2010) https://doi.org/10.1117/12.870159

KEYWORDS: Terahertz radiation, Imaging systems, Phase shifts, Phase imaging, Foam, Interferometers, Phase measurement, Millimeter wave imaging, Inspection

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Proceedings Article | 14 September 2010 Paper

Image hiding using optical interference

Yan Zhang, Weining Wang

Proceedings Volume 7387, 738703 (2010) https://doi.org/10.1117/12.870342

KEYWORDS: Image encryption, Image processing, Fourier transforms, Optical image encryption, Capacitance, Diffraction, Computer security, Imaging spectroscopy, Beam splitters, Safety

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Proceedings Article | 24 November 2009 Paper

Optical image hiding based on interference

Yan Zhang, Bo Wang

Proceedings Volume 7513, 75130Q (2009) https://doi.org/10.1117/12.837003

KEYWORDS: Image encryption, Image processing, 3D image reconstruction, Fourier transforms, Capacitance, Diffraction, Imaging spectroscopy, Optoelectronics, Holography, Beam splitters

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Proceedings Article | 30 October 2009 Paper

Terahertz multispectral focal plane imaging

Yan Zhang, Xinke Wang, Ye Cui, Wenfeng Sun

Proceedings Volume 7494, 749408 (2009) https://doi.org/10.1117/12.833258

KEYWORDS: Terahertz radiation, Silicon, Semiconducting wafers, Mirrors, Tomography, Laser beam diagnostics, Multispectral imaging, Refractive index, Sensors, Crystals

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Proceedings Article | 5 August 2009 Paper

Pulsed phase thermography for defect detection of honeycomb structure

Yan Zhang, Lichun Feng, Yanhong Li, Cunlin Zhang

Proceedings Volume 7383, 73830G (2009) https://doi.org/10.1117/12.835962

KEYWORDS: Thermography, Skin, Fourier transforms, Data storage, Signal to noise ratio, Nondestructive evaluation, Defect detection, Infrared imaging, Infrared radiation, Infrared cameras

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Proceedings Article | 14 January 2008 Paper

Subwavelength structure device for bandgap generation in the THz range

Yan Zhang, Kuo Meng

Proceedings Volume 6840, 684012 (2008) https://doi.org/10.1117/12.760277

KEYWORDS: Terahertz radiation, Near field optics, Surface plasmons, Finite-difference time-domain method, Electrons, Polarization, Imaging systems, Metals, Physics, Spectroscopes

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Proceedings Article | 4 January 2008 Paper

Reflective terahertz en-face tomography

Xinke Wang, Ye Cui, Wenfeng Sun, Yan Zhang

Proceedings Volume 6840, 68400F (2008) https://doi.org/10.1117/12.760136

KEYWORDS: Terahertz radiation, Silicon, Semiconducting wafers, Mirrors, Tomography, Imaging systems, Reflectivity, Crystals, Refractive index, Reflection

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Proceedings Article | 18 June 2007 Paper

Terahertz multiwavelength phase imaging without 2π ambiguity

Yan Zhang, Liangliang Zhang, Cunlin Zhang

Proceedings Volume 6616, 66163L (2007) https://doi.org/10.1117/12.725787

KEYWORDS: Terahertz radiation, Phase imaging, Crystals, Sensors, Imaging technologies, Data processing, Beam splitters, Laser crystals, Millimeter wave imaging, Spectroscopy

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Proceedings Article | 20 January 2006 Paper

Iterative reconstruction of wave front from an in-line hologram sequence

Yan Zhang, De-Xiang Zheng, Jing-Ling Sheng, Cun-Lin Zhang, Giancarlo Pedrini

Proceedings Volume 6027, 602729 (2006) https://doi.org/10.1117/12.668204

KEYWORDS: Holograms, Wavefronts, Digital holography, Charge-coupled devices, 3D image reconstruction, Wave propagation, Reconstruction algorithms, Holography, Photosensitive materials, Phase shifts

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Proceedings Article | 20 January 2006 Paper

Data processing methods for terahertz transmitted spectral imaging

Zhengwei Zhang, Weili Cui, Guozhong Zhao, Yan Zhang, Cunlin Zhang

Proceedings Volume 6027, 60270K (2006) https://doi.org/10.1117/12.667898

KEYWORDS: Terahertz radiation, Data processing, Image quality, Imaging spectroscopy, Fourier transforms, Image processing, Refractive index, Absorption, Mirrors, Laser beam diagnostics

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Proceedings Article | 13 June 2005 Paper

Reconstruction of in-line hologram by using iterative algorithm

Yan Zhang

Proceedings Volume 5856, (2005) https://doi.org/10.1117/12.612411

KEYWORDS: Holograms, Reconstruction algorithms, 3D image reconstruction, Digital holography, Charge-coupled devices, Holography, Wave propagation, Absorption, Digital recording, Wavefronts

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Proceedings Article | 7 February 2005 Paper

3D locations of the object directly from in-line holograms using the Gabor transform

Yan Zhang, De-Xiang Zheng, Jing-Ling Shen, Cun-Lin Zhang

Proceedings Volume 5636, (2005) https://doi.org/10.1117/12.570465

KEYWORDS: Holograms, Particles, Charge-coupled devices, Digital holography, CCD cameras, Holography, Signal to noise ratio, Computer simulations, Diffraction, Analytical research

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Proceedings Article | 10 January 2005 Paper

New algorithm for high-resolution thermal imaging

Cunlin Zhang, Jihua Chen, Ying Hu, Yan Zhang

Proceedings Volume 5640, (2005) https://doi.org/10.1117/12.580941

KEYWORDS: Thermography, Infrared cameras, Infrared imaging, Cameras, Image resolution, Diffusion, Imaging systems, Nondestructive evaluation, Image processing, Wave propagation

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Showing 5 of 38 publications

Conference Committee Involvement (16)

Infrared, Millimeter-Wave, and Terahertz Technologies XI

13 October 2024 | Nantong, Jiangsu, China

Holography, Diffractive Optics, and Applications XIV

12 October 2024 | Nantong, Jiangsu, China

Infrared, Millimeter-Wave, and Terahertz Technologies X

15 October 2023 | Beijing, China

Holography, Diffractive Optics, and Applications XIII

14 October 2023 | Beijing, China

Infrared, Millimeter-Wave, and Terahertz Technologies IX

5 December 2022 | Online Only, China

Holography, Diffractive Optics, and Applications XII

5 December 2022 | Online Only, China

Holography, Diffractive Optics, and Applications XI

10 October 2021 | Nantong, JS, China

Infrared, Millimeter-Wave, and Terahertz Technologies VIII

10 October 2021 | Nantong, JS, China

Infrared, Millimeter-Wave, and Terahertz Technologies VII

12 October 2020 | Online Only, China

Infrared, Millimeter-Wave, and Terahertz Technologies VI

21 October 2019 | Hangzhou, China

Infrared, Millimeter-Wave, and Terahertz Technologies V

12 October 2018 | Beijing, China

Infrared, Millimeter-Wave, and Terahertz Technologies IV

12 October 2016 | Beijing, China

Infrared, Millimeter-Wave, and Terahertz Technologies III

9 October 2014 | Beijing, China

Infrared, Millimeter-Wave, and Terahertz Technologies II

5 November 2012 | Beijing, China

Infrared, Millimeter Wave, and Terahertz Technologies

18 October 2010 | Beijing, China

Terahertz Photonics

12 November 2007 | Beijing, China

Showing 5 of 16 Conference Committees

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