Special Section on Slow and Fast Light

Slow light in liquid crystal media

[+] Author Affiliations
Umberto Bortolozzo

INLN, Université de Nice-Sophia Antipolis, CNRS,1361 route des Lucioles, 06560 Valbonne, France

Dong Wei

INLN, Université de Nice-Sophia Antipolis, CNRS,1361 route des Lucioles, 06560 Valbonne, France

Jean-Pierre Huignard

Jphopto, 20 Rue Campo Formio, 75013 Paris, France

Stefania Residori

INLN, Université de Nice-Sophia Antipolis, CNRS,1361 route des Lucioles, 06560 Valbonne, France

Opt. Eng. 53(10), 102704 (Jul 23, 2014). doi:10.1117/1.OE.53.10.102704
History: Received March 27, 2014; Revised June 4, 2014; Accepted June 23, 2014
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Abstract.  Liquid crystal media are characterized by large and tunable dispersive properties and hence allow achievement of large group delays. At the same time, liquid crystals provide large areas and are easily reconfigurable and highly sensitive devices; they are, therefore, well adapted for interferometric applications. Two different ways of achieving slow light in liquid crystals are presented. The first method consists of exploiting photoisomerization-induced transparency in dye-doped chiral liquid crystals, and the second method makes use of two-wave mixing optical resonance in pure nematics. In both mechanisms, two beams are sent to the medium, where they create a grating, either of absorption or of refractive index. Both physical mechanisms are elucidated in the context of slow light, then, as examples of sensing applications, Doppler shift measurements and adaptive holography are presented.

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© 2014 Society of Photo-Optical Instrumentation Engineers

Citation

Umberto Bortolozzo ; Dong Wei ; Jean-Pierre Huignard and Stefania Residori
"Slow light in liquid crystal media", Opt. Eng. 53(10), 102704 (Jul 23, 2014). ; http://dx.doi.org/10.1117/1.OE.53.10.102704


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