Instabilities and solitons in nonlinear excitonic waveguides

Oleksii A. Smyrnov, Fabio Biancalana

Research output: Chapter in Book/Report/Conference proceedingConference contribution


The propagation of light in a single-mode micron-size waveguide made of semiconducting excitonic material has been studied both analytically and numerically. The light pulses, spectrally centered in the vicinity of the 1s Wannier exciton resonance, interact with the medium nonlinearly. This optical cubic nonlinearity is caused by the repulsive exciton-exciton interactions in the semiconductor. We demonstrate that a very strong, unconventional modulational instability takes place, which has not been reported before. After reducing the coupled ordinary differential equation for the medium polarization and Maxwell's equations for the light pulse to a single nonlinear Schrodinger equation, we are also able to explore the formation of solitary waves both inside and outside the polaritonic gap.

Original languageEnglish
Title of host publicationThird International Workshop On Theoretical And Computational Nanophotonics
Subtitle of host publicationTaCoNa-Photonics 2010
EditorsDmitry N Chigrin
PublisherAmerican Institute of Physics
Number of pages3
ISBN (Print)978-0-7354-0846-3
Publication statusPublished - 2010
Event3rd International Workshop on Theoretical and Computational Nanophotonics - Bad Honnef, Germany
Duration: 3 Nov 20105 Nov 2010

Publication series

NameAIP Conference Proceedings
ISSN (Print)0094-243X


Conference3rd International Workshop on Theoretical and Computational Nanophotonics
Abbreviated titleTaCoNa-Photonics 2010
CityBad Honnef


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