Topography-induced polarization anisotropy in mesoscale structures

Hsieh Li Chou, Yi-Chun Chen, Pei Kuen Wei*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


Optical polarization anisotropy on the surface of sub wavelength air-dielectric structures was studied by polarization-modulation near-field optical microscopy. A large degree of polarization anisotropy was measured in the higher topographic region of transparent gratings. In two-dimensional air-hole arrays, the larger polarization anisotropy occurs in the dielectric regions. Both dielectric and air regions have a 90° difference in the directions of maximum transmission. From calculations with the finite-difference time-domain method, we verified that diffracted light from the mesoscale topographic edges contributes to polarization anisotropy and directional differences.

Original languageEnglish
Pages (from-to)I38-I42
Issue number5 SUPPL.
StatePublished - 1 Nov 2004


  • Mesoscale structure
  • Near-field scanning microscopy
  • Polarization

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