All-optical subdiffraction multilevel data encoding onto azo-polymeric thin films

By exploiting photoinduced 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, five-level bits are created by associating different bit values to different birefringence di...

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Bibliographic Details
Published in:Optics letters 2009-03, Vol.34 (6), p.761-763
Main Authors: SAVOINI, Matteo, BIAGIONI, Paolo, DUO, Lamberto, FINAZZI, Marco
Format: Article
Language:English
Subjects:
Exact sciences and technology
Fundamental areas of phenomenology (including applications)
Holographic recording materials
optical storage media
Optical materials
Optics
Physics
Polymers and organics
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Summary:By exploiting photoinduced 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, five-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.
ISSN:0146-9592
1539-4794
DOI:10.1364/ol.34.000761