Abstract
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 language | English |
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Pages (from-to) | I38-I42 |
Journal | Scanning |
Volume | 26 |
Issue number | 5 SUPPL. |
State | Published - 1 Nov 2004 |
Keywords
- Mesoscale structure
- Near-field scanning microscopy
- Polarization