All-optical subdiffraction multilevel data encoding onto azo-polymeric thin films
Optics Letters, Vol. 34, Issue 6, pp. 761-763 (2009)
http://dx.doi.org/10.1364/OL.34.000761
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Abstract
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.
© 2009 Optical Society of America
OCIS Codes
(160.5470) Materials : Polymers
(210.4810) Optical data storage : Optical storage-recording materials
(260.1440) Physical optics : Birefringence
(210.4245) Optical data storage : Near-field optical recording
(310.5448) Thin films : Polarization, other optical properties
ToC Category:
Optical Data Storage
History
Original Manuscript: December 23, 2008
Revised Manuscript: February 4, 2009
Manuscript Accepted: February 4, 2009
Published: March 6, 2009
Citation
Matteo Savoini, Paolo Biagioni, Lamberto Duò, and Marco Finazzi, "All-optical subdiffraction multilevel data encoding onto azo-polymeric thin films," Opt. Lett. 34, 761-763 (2009)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-34-6-761
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