English
español
Please use this identifier to cite or link to this item:
http://hdl.handle.net/10261/9437
Share/Impact:
Statistics |
![]() ![]() ![]() |
|
|
Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL | DATACITE | |||
|
Title: | Optical gain by a simple photoisomerization process |
Authors: | Gallego-Gómez, Francisco ![]() ![]() |
Keywords: | Polymers Optical, photonic and optoelectronic materials Organic holographic materials Non-photorefractive materials Reversible photoisomerization gratings Gain steering |
Issue Date: | 4-May-2008 |
Publisher: | Nature Publishing Group |
Citation: | Nature Materials 7(6): 490-497 (2008) |
Abstract: | Organic holographic materials are pursued as versatile and cheap data-storage materials. It is generally assumed that under steady-state conditions, only photorefractive holographic media exhibit a non-local response to a light-intensity pattern, which results in an asymmetric two-beam coupling or 'gain', where intensity is transferred from one beam to the other as a measure of writing efficiency. Here, we demonstrate non-local holographic recording in a non-photorefractive material. We demonstrate that reversible photoisomerization gratings recorded in a non-photorefractive azo-based material exhibit large optical gain coefficients beyond 1,000 cm-1, even for polarization gratings. The grating characteristics differ markedly from classical photorefractive features, but can be modelled by considering the influence of the Poynting vector on the photoisomerization. The external control of the Poynting vector enables manipulation of the gain coefficient, including its sign (the direction of energy exchange), a novel phenomenon we refer to as 'gain steering'. A very high sensitivity of about 100 cm2 J-1 was achieved. This high sensitivity, combined with a high spatial resolution, suggests a great technical advantage for applications in image processing and phase conjugation. |
Description: | 8 pages, 5 figures.-- PMID: 18454152 [PubMed].-- Supplementary information (Suppl. figures S1-S5) available at: http://www.nature.com/nmat/journal/v7/n6/suppinfo/nmat2186_S1.html Printed version published in Jun 2008. |
Publisher version (URL): | http://dx.doi.org/10.1038/nmat2186 |
URI: | http://hdl.handle.net/10261/9437 |
DOI: | http://dx.doi.org/10.1038/nmat2186 |
ISSN: | 1476-1122 |
E-ISSN: | 1476-4660 |
Appears in Collections: | (ICMM) Artículos |
Files in This Item:
There are no files associated with this item.
Show full item record
Review this work
Review this work
WARNING: Items in Digital.CSIC are protected by copyright, with all rights reserved, unless otherwise indicated.