| Issue |
J. Eur. Opt. Soc.-Rapid Publ.
Volume 5, 2010
|
|
|---|---|---|
| Article Number | 10008 | |
| Number of page(s) | 5 | |
| DOI | https://doi.org/10.2971/jeos.2010.10008 | |
| Published online | 02 February 2010 | |
Regular papers
Incoherent interaction of nematicons in bias-free liquid-crystal cells
1
Nonlinear Physics Center, Research School of Physics and Engineering, The Australian National University, Canberra ACT 0200, Australia
2
Laser Physics Center, Research School of Physics and Engineering, The Australian National University, Canberra ACT 0200, Australia
3
NooEL, Department of Electronic Engineering, University of Rome “Roma Tre”, 00146 Rome, Italy
Received:
16
November
2009
We study experimentally the propagation dynamics and interaction of a pair of mutually incoherent nematicons: spatial optical solitons in nematic liquid crystals. In contrast to earlier studies, we consider a bias-free liquid-crystal cell and compare the soliton interaction in copropagating and counterpropagating geometries. We analyze the dependence of nematicon interaction on input power and observe a direct manifestation of a long-range nonlocal nonlinearity. Attraction of counterpropagating solitons requires higher powers and longer relaxation times than that of copropagating nematicons due to losses-induced power asymmetry of counterpropagating nematicons.
Key words: nonlinear optics / liquid crystals / nematicons
© The Author(s) 2010. All rights reserved.
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