All optical sub diffraction multilevel data encoding onto azo polymeric thin films

Details All optical sub diffraction multilevel data encoding onto azo polymeric thin films All optical sub diffraction multilevel data encoding onto azo polymeric thin films

2008-10-17

arxiv.org/abs/0810.3113v1

Opt. Lett. 34, 761 (2009).

Physics

Condensed Matter

Materials Science

13 pages, 5 figures

Scientific paper

By exploiting photo-induced reorientation in azo-polymer thin films, we demonstrate all-optical polarization-encoded information storage with a scanning near-field optical microscope. In the writing routine, 5-level bits are created by associating different bit values to different birefringence directions, induced in the polymer after illumination with linearly polarized light. The reading routine is then performed by implementing polarization-modulation techniques on the same near-field microscope, in order to measure the encoded birefringence direction.

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