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Observation of propagation properties in polymeric optical waveguides by polarized near-field scanning optical microscopy

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1 Author(s)
Mitsui, T. ; Nanomaterials Laboratory, National Institute for Materials Science, Namiki 1-1, Tsukuba, Ibaraki 305-0044, Japan

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A polarized guide-collection-mode near-field scanning optical microscopy (NSOM) technique was used to characterize clearly the periodic intensity modulation and multimode propagation within a polymeric optical waveguide by selecting the polarization component. The polarized NSOM technique revealed that the periodic intensity modulation along the waveguide axis has a polarization property whose electric vector is perpendicular to the waveguide axis, and that the period of intensity modulation nearly equals the wavelength inside the waveguide. The intensity modulation originates from a standing wave caused by a resonator formed between the entrance and exit facets.

Published in:

Journal of Applied Physics  (Volume:98 ,  Issue: 8 )