Coupled surface plasmons and optical guided wave exploration of near-surface director profile

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Coupled surface plasmons and optical guided wave exploration of near-surface director profile

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dc.contributor.author Yang, Fuzi en_GB
dc.contributor.author Ruan, Lizhen en_GB
dc.contributor.author Jewell, Sharon A. en_GB
dc.contributor.author Sambles, J. Roy en_GB
dc.contributor.department University of Exeter; Tsinghua University, Beijing en_GB
dc.date.accessioned 2008-05-30T13:45:09Z en_GB
dc.date.accessioned 2011-01-25T11:54:15Z en_US
dc.date.accessioned 2013-03-20T13:00:47Z
dc.date.issued 2007 en_GB
dc.description.abstract For a liquid crystal (LC) cell with thin silver claddings it is possible, using a high index coupling prism, to excite both surface plasmon modes and ordinary optical guided modes. In a situation where the tilt of the director varies from homogeneous to homeotropic through the cell, then for p-polarized incident radiation the p-polarized surface plasmon mode and the ordinary guided waves may couple to each other. When the plane containing the director is normal to the incident plane, there is also polarization conversion leading to strong coupling between the p-polarized surface plasmon and s-like guided modes. From theoretical analyses together with numerical modelling it is shown how this coupling between the surface plasmon mode and guided waves gives a high sensitivity to the surface director tilt profile near the walls, higher than that of the surface plasmon mode alone. Experimental confirmation of this has been realized using a hybrid aligned nematic (HAN) LC cell with the director in a plane normal to the incident plane. The results fully confirm the model predictions showing that this coupling of surface plasmons to guided waves provides a powerful tool for near-surface director studies. en_GB
dc.identifier.citation 9, article 49 en_GB
dc.identifier.doi 10.1088/1367-2630/9/3/049 en_GB
dc.identifier.uri http://hdl.handle.net/10036/29112 en_GB
dc.language.iso en en_GB
dc.publisher Institute of Physics and Deutsche Physikalische Gesellschaft en_GB
dc.relation.url http://dx.doi.org/10.1088/1367-2630/9/3/049 en_GB
dc.relation.url http://www.iop.org/EJ/abstract/1367-2630/9/3/049/ en_GB
dc.title Coupled surface plasmons and optical guided wave exploration of near-surface director profile en_GB
dc.type Article en_GB
dc.date.available 2008-05-30T13:45:09Z en_GB
dc.date.available 2011-01-25T11:54:15Z en_US
dc.date.available 2013-03-20T13:00:47Z
dc.identifier.issn 1367-2630 en_GB
dc.description Copyright © 2007 IOP Publishing Ltd and Deutsche Physikalische Gesellschaft. This is the published version of an article published in New Journal of Physics Vol. 9, article 49. DOI: 10.1088/1367-2630/9/3/049 en_GB
dc.identifier.journal New Journal of Physics en_GB


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