Shuyun Teng

Shandong Normal University, Chi-nan-shih, Shandong Sheng, China

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Publications (39)49.89 Total impact

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    ABSTRACT: Talbot effect of the grating with different defect is studied theoretically and experimentally in this paper. The defects of grating include the loss of the diffraction unit, the dislocation of the diffraction unit and the modulation of the unit separation. The exact diffraction distributions of three kinds of defective gratings are obtained according to the finite-difference time-domain (FDTD) method. The calculation results show the image of the missing or dislocating unit appears at the Talbot distance (as mentioned in K. Patorski Prog. Opt., 27, 1989, pp.1–108). This is the so-called self-repair ability of grating imaging. In addition, some more phenomena are discovered. The loss or the dislocation of diffraction unit causes the diffraction distortion within a certain radial angle. The regular modulation of unit separation changes the original diffraction, but the new periodicity of the diffraction distribution rebuilds. The self-imaging of grating with smaller random modulation still keeps the partial self-repair ability, and yet this characteristic depends on the modulation degree of defective grating. These diffraction phenomena of the defective gratings are explained by use of the diffraction theory of grating. The practical experiment is also performed and the experimental results confirm the theoretic predictions.
    Optics Communications 02/2015; 336:213–223. · 1.44 Impact Factor
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    ABSTRACT: Based on the self-similarity property of fractal, two types of fractal gratings are produced according to the production and addition operations of multiple periodic gratings. Fresnel diffractions of fractal grating are analyzed theoretically, and the general mathematic expressions of the diffraction intensity distributions of fractal grating are deduced. The gray-scale patterns of the 2D diffraction distributions of fractal grating are provided through numerical calculations. The diffraction patterns take on the periodicity along the longitude and transverse directions. The 1D diffraction distribution at some certain distances shows the same structure as the fractal grating. This indicates that the self-image of fractal grating is really formed in the Fresnel diffraction region. The experimental measurement of the diffraction intensity distribution of fractal grating with different fractal dimensions and different fractal levels is performed, and the self-images of fractal grating are obtained successfully in experiments. The conclusions of this paper are helpful for the development of the application of fractal grating.
    Applied Optics 04/2014; 53(10):2105-2111. · 1.69 Impact Factor
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    ABSTRACT: Talbot effect of two-dimensional fractal grating built by square aperture arrays is studied theoretically and experimentally in this paper. The amplitude fractal gratings are produced by use of the spatial light modulator, and the diffraction intensity distributions of fractal gratings with different fractal level in Fresnel diffraction field are measured with the help of the two-dimensional CCD. Talbot images of fractal gratings with 1-level and 2-level fractal are obtained in practical experiment. The analytic expression of Fresnel diffraction intensity of the fractal gratings is derived through decomposing fractal gratings into the sum of many periodic gratings. Theoretic results predict the self-image of fractal grating reappears at some certain distance. The numerical calculations also show the Talbot image and the fractional Talbot image of fractal grating. These results may extend the application of fractal grating in the optical processing of information and laser measurement.
    Optics Communications 03/2014; 315:103–107. · 1.44 Impact Factor
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    ABSTRACT: We study the physical mechanism of near-field interference of slit doublet and explore the distinctive phenomena in near-field interference of slit doublet. The average electric field and average energy-flow density are chosen to describe the near-field distribution rules of the electromagnetic field. The numerical calculations for near-field interference of slit doublet under different illumination conditions are performed according to the finite-difference time-domain method, and the distinctive characteristics of the near-field interference of slit doublet are provided. They include the polarization dependence, the distortion of fringes, and the bifurcation of the fringes. These characteristics are completely different from those of the far-field interference. With the aid of the interference of two slits and of slit and groove, the physical mechanism of polarization dependence of near-field interference is investigated. The fringe distortion of the electric field and the fringe bifurcation of the energy-flow density reflect the amplitude and phase variations of the electromagnetic field. The influences of the slit parameters and the base material on the near-field interference of slit doublet are also discussed. These results may provide us with new insights into the underlying physics of interaction between complex nanostructures and electromagnetic waves.
    Journal of the Optical Society of America A 11/2013; 30(11):2273-9. · 1.67 Impact Factor
  • Optik - International Journal for Light and Electron Optics 11/2013; 124(22):5478-5480. · 0.77 Impact Factor
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    ABSTRACT: We study the diffractions by one small circular aperture, and numerically calculate the diffraction intensity distribution with the help of the finite-difference time-domain (FDTD) technique. The diffraction patterns are presented, the variation of the near-field diffraction with the radius and the propagation distance can be observed clearly. The one-dimensional distributions on the axis, along the boundary shadow and the transverse direction are discussed too. These results are also compared with to ones obtained according to Rayleigh–Sommerfeld diffraction and the Fresnel approximation. We think that this work does not only enrich the diffraction theory of the circular aperture, but it is also helpful for the applications of the small holes in near field.
    Optik - International Journal for Light and Electron Optics 08/2013; 124(16):2507–2510. · 0.77 Impact Factor
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    ABSTRACT: Theoretic and experimental studies of the Talbot effect of quasi-periodic gratings are performed in this paper. The diffractions of periodic and quasi-periodic square aperture arrays in Fresnel fields are analyzed according to the scalar diffraction theory. The expressions of the diffraction intensities of two types of quasi-periodic gratings are deduced. Talbot images of the quasi-periodic gratings are predicted to appear at multiple certain distances. The quasi-periodic square aperture arrays are produced with the aid of a liquid crystal light modulator, and the self-images of the quasi-periodic gratings are measured successfully in the experiment. This study indicates that even a structure in short-range disorder may take on the self-imaging effect in a Fresnel field.
    Applied Optics 07/2013; 52(21):5083-7. · 1.69 Impact Factor
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    ABSTRACT: On basis of the scattering theory, we analyze the distribution of diffraction orders of a one-dimensional reflection grating. From the inequality satisfied by the incident angle and the diffraction order, we determine the visible diffraction orders and discuss the variation of the number of the diffraction orders with the incident angle and the grating period. We find the visible diffraction orders are always more than those obtained according to the traditional grating theory. The practical experiment is performed too, and the experimental results verify the theoretical predictions.
    Optik - International Journal for Light and Electron Optics 07/2013; 124(14):1936–1939. · 0.77 Impact Factor
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    ABSTRACT: This paper reports experimental studies on speckles produced by the rough silver films. The speckles on the rough glass/silver surfaces are measured with a microscopic imaging system. The structures of speckle patterns have the characteristics of fractals and multi-scaled sizes. We find that with the increase of the silver film thickness, the contrast of the speckles increases, and the intensity probability density functions gradually transit to exponential decay. We calculate the global and the local correlation functions of the speckle patterns, and find that both the fractal exponent and correlation length of the small-sized speckles decrease with the thickness of the silver films. We use the mechanisms of rough dielectric interface scattering and random surface plasmon waves to give the preliminary explanations for the evolutions of the speckles.
    Optics Express 04/2013; 21(7):8831-42. · 3.55 Impact Factor
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    ABSTRACT: Dielectric ceramic thin film was fabricated on SiO2 (110) substrates by radio frequency (RF) magnetron sputtering method using a Zn-enriched (Ba0.3Sr0.7) (Zn1/3Nb2/3)O3 target followed by annealing in O2 atmosphere at different temperatures. The effects of annealing temperatures on the crystallization, compositions, microstructures, and morphologies of the ceramic thin films have been investigated in detail. The results showed that all the samples exhibited well- crystallized structures with the main phases of BaxSr1-xNb2O6, differing from the target due to volatilization of ZnO. X-ray photoelectron spectroscopy (XPS) analysis shows that only one chemical state is found for each spectrum of Ba, Nb, Sr, Zn and O photoelectron in the films. The surface root-mean-square roughnesses of the thin films decrease with the increasing in the annealing temperatures. Scanning electron microscope (SEM) shows that the surface of the films were crack-free and compact. The spherical grains become large in size with the increase in the annealing temperatures.
    Journal of Materials Science Materials in Electronics 01/2012; 23(1). · 1.49 Impact Factor
  • Shuyun Teng, Wenzhen Guo, Chuanfu Cheng
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    ABSTRACT: Diffractions by the one-dimensional high-density grating in the near field with TM and TE polarization illuminations are studied, and the diffraction intensity distributions are calculated with the finite-difference time-domain technique. The calculation results show that the diffractions of the high-density grating with different polarization illuminations are different. The quasi-Talbot image of the grating depends on the polarization of the incident wave, and the existence condition of the quasi-Talbot image of the grating in the near field also changes with the polarization of the incident wave. We present explanations based on the vector distribution of the energy flow density. These studies on the polarization dependence of the quasi-Talbot imaging of the high-density grating are helpful for the application of the grating to near-field photolithography.
    Journal of the Optical Society of America A 03/2010; 27(3):366-71. · 1.67 Impact Factor
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    ABSTRACT: Theoretical and experimental studies of the diffraction of a two-dimensional reflection grating are performed in this paper. Based on the theory of optical scattering, the light field in the Fraunhofer diffraction region is deduced, and the general expression of the diffraction field is given in the form of the wave vectors of the diffracted wave and the incident wave. Then the coordinate of the diffraction order is obtained. The calculation results show that the diffraction distortion of the grating appears when the grating is illuminated by the oblique incident light wave and the distortion is restricted on the diffraction of the grids varying along the direction perpendicular to the plane of incidence. The orbit equation satisfied by the distortion diffraction orders is presented. The experimental results verify adequately this diffraction distortion rule of the grating, and they agree very well with the theoretical results.
    Applied Optics 09/2009; 48(23):4519-25. · 1.69 Impact Factor
  • Shuyun Teng, Yugui Tan, Chuanfu Cheng
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    ABSTRACT: On the basis of the finite-difference time-domain technique, the diffraction of the high-density grating in the near field is developed, and the gray-scale pattern of the diffraction intensity distribution of a one-dimensional grating is presented. A detailed analysis shows that the near-field diffraction of the grating is the result of the diffraction of a single slit, the interference of two evanescent waves from neighboring slits, and the interference of the homogeneous waves from the slits. Through many numerical calculations, the condition for obtaining the quasi-Talbot imaging of the grating in the near field is explored, i.e., the period of the grating d is larger than the incident wavelength lambda but smaller than 4lambda. The influence of the opening ratio of the grating on the quasi-Talbot imaging of the grating in the near field is also discussed. This study of the near-field diffraction of the high-density grating may be helpful for understanding the diffraction characteristics of subwavelength structures, and the quasi-Talbot imaging of the high-density grating will contribute to the application of the grating in near-field photolithography.
    Journal of the Optical Society of America A 01/2009; 25(12):2945-51. · 1.67 Impact Factor
  • Shuyun Teng, Tongjun Zhou, Chuanfu Cheng
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    ABSTRACT: The Fresnel theory of the Talbot effect of the grating is reviewed in this paper, and the general formula of the Fresnel diffraction of the grating with finite aperture size is presented. The aperture effect of the grating on the Talbot image is discussed and a number of numerical calculations are performed. The variation rule of the diffraction intensity distribution at the Talbot distance with the aperture size of the grating and the case at different Talbot distances are obtained through the calculations, and the corresponding explanations of these phenomena are given in this paper. We think that these discussions provide the theoretic basis for the practical application of the Talbot effect of the actual grating.
    Optik - International Journal for Light and Electron Optics 01/2008; 119(14):695-699. · 0.77 Impact Factor
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    ABSTRACT: We analyze theoretically the diffraction of phase gratings in the deep Fresnel field on the basis of the theory of scalar diffraction and Green's theorem and present the general formula for the diffraction intensity of a one-dimensional sinusoidal phase grating. The numerical calculations show that in the deep Fresnel region the diffraction distribution can be described by designating three characteristic regions that are influenced by the parameters of the grating. The microlensing effect of the interface of the phase grating provides the corresponding explanation. Moreover, according to the viewpoint that the diffraction intensity distribution is the result of the interference of the diffraction orders of the grating, we find that the diffraction patterns, depending on the carved depth of the phase grating, are determined by the contributing diffraction orders, their relative power, and the quasi-Talbot effect of the phase grating, which results from the second meeting of the diffraction orders carrying most of the power of the total field, as in the case of the amplitude grating.
    Journal of the Optical Society of America A 12/2007; 24(11):3636-43. · 1.67 Impact Factor
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    ABSTRACT: Based on the theory of scalar diffraction, the diffraction of gratings in the deep Fresnel diffraction region is developed, and the general formula of the diffraction intensity of the one-dimensional grating is presented by using the Hankel function. Through numerical calculations, some interesting diffraction phenomena are found. In the deep Fresnel diffraction region, the dominant effects, with increasing propagation distance from the grating, are, in order, the geometrical effect, the quasi-geometrical effect, and the interference and diffraction effects. Furthermore, the diffraction intensities vary periodically in the diffraction effect region with increasing propagation distance. Quasi-Talbot imaging of the grating exists in the interference and diffraction regions, and the intensity distributions most similar to the structure of the grating are not at the exact Talbot distances. These phenomena in the deep Fresnel diffraction region are distinct from those in the Fresnel diffraction region. The formation origin of quasi-Talbot imaging of the grating is also discussed, and the numerical calculations powerfully verify the theoretical results.
    Journal of the Optical Society of America A 07/2007; 24(6):1656-65. · 1.67 Impact Factor
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    ABSTRACT: A new approach based on the gated integration technique is proposed for the accurate measurement of the autocorrelation function of speckle intensities scattered from a random phase screen. The Boxcar used for this technique in the acquisition of the speckle intensity data integrates the photoelectric signal during its sampling gate open, and it repeats the sampling by a preset number, m. The average analog of the m samplings output by the Boxcar enhances the signal-to-noise ratio by m, because the repeated sampling and the average make the useful speckle signals stable, while the randomly varied photoelectric noise is suppressed by 1/m. In the experiment, we use an analog-to-digital converter module to synchronize all the actions such as the stepped movement of the phase screen, the repeated sampling, the readout of the averaged output of the Boxcar, etc. The experimental results show that speckle signals are better recovered from contaminated signals, and the autocorrelation function with the secondary maximum is obtained, indicating that the accuracy of the measurement of the autocorrelation function is greatly improved by the gated integration technique.
    Optics & Laser Technology 01/2007; 39(6):1150-1154. · 1.37 Impact Factor
  • Shuyun Teng, Tongjun Zhou, Chuanfu Cheng
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    ABSTRACT: We study the Fresnel diffraction of Gaussian beam truncated by one circular aperture, and give the general analytic expression of the Fresnel diffraction of truncated Gaussian beam denoted by Bessel functions. Then the characteristic of the axial diffraction fluctuation and the influence of the caliber of the circular aperture and the wave waist of Gaussian beam on the diffraction distributions are discussed, respectively. Through the numerical calculations, the characteristics of the transverse diffraction are presented and the relationship of the fluctuation of the transverse diffraction profile and the position of the axial point is shown. The physical origin of the fluctuation of Fresnel diffraction intensities of truncated Gaussian beam is expressed in terms of Fresnel half-zone theory. These phenomena and the conclusions are important for the measurement of the parameters of the beam and its applications.
    Optik - International Journal for Light and Electron Optics 01/2007; · 0.77 Impact Factor
  • Shuyun Teng, Liren Liu, De’an Liu
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    ABSTRACT: Recurring to the characteristic of Bessel function, we give the analytic expression of the Fresnel diffraction by a circular aperture, thus the diffractions on the propagation axis and along the boundary of the geometrical shadow are discussed conveniently. Since it is difficult to embody intuitively the physical meaning from this series expression of the Fresnel diffraction, after weighing the diffractions on the axis and along the boundary of the geometrical shadow, we propose a simple approximate expression of the circular diffraction, which is equivalent to the rigorous solution in the further propagation distance. It is important for the measurement of the parameter of the beam, such as the quantitative analysis of the relationship of the wave error and the divergence of the beam. In this paper, the relationship of the fluctuation of the transverse diffraction profile and the position of the axial point is discussed too.
    Optik - International Journal for Light and Electron Optics 01/2005; 116(12):568-572. · 0.77 Impact Factor
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    ABSTRACT: For an ultrashort pulsed beam (UPB) with different polarization states diffracted by a volume holographic grating (VHG), the effects of the bandwidth to its diffraction properties are studied. By developing the coupled wave theory of Kogelnik, the formulas of the spectral and temporal distributions of the transmission and diffraction pulse beams are analytically given, with considering the effect of the dispersion of the grating media further. Then the bandwidths of the VHG for the UPB with different polarization states are investigated. We show the changes of the spectral and temporal distributions of the transmission and diffraction pulsed beams with different ratios of the bandwidth of the UPB to the bandwidth of the VHG. Finally, the varieties of the diffraction efficiency of the VHG for the UPB with different polarization states are studied.
    Proc SPIE 01/2005;

Publication Stats

73 Citations
49.89 Total Impact Points

Institutions

  • 2007–2014
    • Shandong Normal University
      Chi-nan-shih, Shandong Sheng, China
  • 2003–2005
    • Northeast Institute of Geography and Agroecology
      • • Shanghai Institute of Optics and Fine Mechanic
      • • Anhui Institute of Optics and Fine Mechanics
      Beijing, Beijing Shi, China
    • Academia Sinica
      T’ai-pei, Taipei, Taiwan
  • 2003–2004
    • Shanghai Institute of Optics and Fine Mechanics, CAS
      Shanghai, Shanghai Shi, China
  • 2002
    • Chinese Academy of Sciences
      • Anhui Institute of Optics and Fine Mechanics
      Beijing, Beijing Shi, China