Antireflection subwavelength structures analyzed by using the finite difference time domain method

Antireflection subwavelength structures (ASSs) are analyzed by using the finite difference time domain (FDTD) method in the visible light spectrum. Low reflectance can be obtained by both the conical and pyramidal shapes over a broadband range. Comparing the reflectance of different structure shapes and aspect ratios by the FDTD method, it shows that the antireflection efficiencies of the pyramidal structures are better than that of the conical structures when the aspect ratio is up to 0.8. It is found that, for the conical structure surface, the average transmittance increases gradually with the aspect ratio and the average transmittance is about 99.6% with the aspect ratio of 2.0. However, for the pyramidal structure with the aspect ratio ranging from 1.0 to 2.0, the average transmittance is up to 99.7%.

[1]  T. Gaylord,et al.  Zero-reflectivity high spatial-frequency rectangular-groove dielectric surface-relief gratings. , 1986, Applied optics.

[2]  William H. Southwell,et al.  Practical Design and Production of Optical Thin Films , 1997 .

[3]  Y Li,et al.  Pulsed-mode laser Sagnac interferometry with applications in nonlinear optics and optical switching. , 1986, Applied Optics.

[4]  G. Michael Morris,et al.  Design, fabrication, and characterization of subwavelength periodic structures for semiconductor antireflection coating in the visible domain , 1996, Optical Systems Design.

[5]  W H Southwell,et al.  Antireflection surfaces in silicon using binary optics technology. , 1992, Applied optics.

[6]  G. M. Morris,et al.  Antireflection structured surfaces for the infrared spectral region. , 1993, Applied optics.

[7]  N Nishida,et al.  Antireflection effect in ultrahigh spatial-frequency holographic relief gratings. , 1987, Applied optics.

[8]  황보창권.  THIN-FILM OPTICAL FILTERS(Third Edition, IoP, 2001)-H. Angus Macleod , 2007 .

[9]  Yoshiaki Kanamori,et al.  Antireflective subwavelength structures on crystalline Si fabricated using directly formed anodic porous alumina masks , 2006 .

[10]  J. Bérenger.  Perfectly matched layer for the FDTD solution of wave-structure interaction problems , 1996 .

[11]  K. Hane,et al.  Broadband antireflection gratings fabricated upon silicon substrates. , 1999, Optics letters.

[12]  Ulrike Schulz,et al.  Review of modern techniques to generate antireflective properties on thermoplastic polymers. , 2006, Applied optics.

[13]  M. Cao,et al.  The study of a nano-porous optical film with the finite difference time domain method , 2004 .

[14]  C. Bernhard,et al.  Structural and functional adaptation in a visual system - Strukturelle und funktionelle Adaptation in einem visuellen System , 1967 .

[15]  H. Macleod,et al.  Thin-Film Optical Filters , 1969 .