Volume 3 Issue 4
Sep.  2010
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Wang Bo. Polarization-selectivity of high-density phase gratings[J]. Chinese Optics, 2010, 3(4): 348-352.
Citation: Wang Bo. Polarization-selectivity of high-density phase gratings[J]. Chinese Optics, 2010, 3(4): 348-352.

Polarization-selectivity of high-density phase gratings

  • Received Date: 11 Jan 2010
  • Rev Recd Date: 13 Mar 2010
  • Publish Date: 25 Aug 2010
  • Diffraction properties of high-density gratings are polarization-dependent, which are different from those of conventional gratings. For TE- and TM-polarized incident waves with a wavelength of 1 550 nm and a duty cycle of 0.5, diffraction efficiencies in the 0th and-1st orders are calculated using Rigorous Coupled-wave Analysis(RCWA). It indicates that more polarization-dependent characteristics are shown for the period 1 200 nm compared with 1 550 nm. Especially, with the period 890 nm, the diffraction efficiency of TE-polarized wave changes with grating depth sinusoidally, while the efficiency of TM-polarized wave which has polarization-selectivity is always concentrated on the 0th order. According to modal method, modes excited by the incident wave are investigated for different periods and the accumulated phase differences of the two modes with different effective indices are calculated when they propagate through the grating region. Moreover, diffraction efficiencies in the 0th and-1st orders are simulated based on two-beam interference. Experimental result shows that the numerical calculation result using RCWA coincides well with the theoretical predictions of modal method, which can explain the physical mechanism of polarization-selectivity of high-density phase gratings.

     

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  • [1] 周素梅,周常河. 二次光栅在波前测量中的应用
    [J]. 光学学报 ,2007,27 (1):1-4. ZHOU S M,ZHOU CH H. Wavefront measurement by using quadratic grating
    [J]. Acta Optica Sinica,2007,27(1):1-4.(in Chinese)

    [2] 底彩慧,周常河. 基于达曼光栅的动态光耦合器
    [J]. 光学学报 ,2007,27(7):1275-1278. DI C H,ZHOU CH H. Dammann grating-based dynamic optical coupler
    [J]. Acta Optica Sinica,2007,27(7):1275-1278.(in Chinese)

    [3] ZHENG J J,ZHOU CH H,DAI E W. Double-line-density gratings structure for compression and generation of double femtosecond laser pulses
    [J]. J. Opt. Soc. Am. B,2007,24(4):979-984.

    [4] MOHARAM M G,GRANN E B,POMMET D A,et al.. Formulation for stable and efficient implementation of the rigorous coupled-wave analysis of binary gratings
    [J]. J. Opt. Soc. Am. A,1995,12(5):1068-1076.

    [5] BOTTEN I C,CRAIG M S,MCPHEDRAN R C,et al.. The dielectric lamellar diffraction grating
    [J]. Opt. Acta,1981,28(3):413-428.

    [6] WANG SH Q,ZHOU CH H,ZHANG Y Y,et al.. Deep-etched high-density fused-silica transmission gratings with high efficiency at a wavelength of 1550 nm
    [J]. Appl. Opt.,2006,45(12):2567-2571.

    [7] WANG B,ZHOU CH H,WANG SH Q,et al.. Polarizing beam splitter of a deep-etched fused-silica grating
    [J]. Opt. Lett.,2007,32(10):1299-1301.

    [8] FENG J J,ZHOU CH H,ZHENG J J,et al.. Dual-function beam splitter of a subwavelength fused-silica grating
    [J]. Appl. Opt.,2009,48(14):2697-2701.

    [9] CLAUSNITZER T,KMPFE T,KLEY E-B,et al.. An intelligible explanation of highly-efficient diffraction in deep dielectric rectangular transmission gratings
    [J]. Opt. Express,2005,13(26):10448-10456.

    [10] CLAUSNITZER T,KMPFE T,KLEY E-B,et al.. Investigation of the polarization-dependent diffraction of deep dielectric rectangular transmission gratings illuminated in Littrow mounting
    [J]. Appl. Opt.,2007,46(6):819-826.

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