Imperial College London
Alternate

ProfessorRupertOulton

Faculty of Natural Sciences, Department of Physics

Professor of Nanophotonics
 
 
 
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Contact

 

+44 (0)20 7594 7576r.oulton

 
 
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Location

 

914Blackett LaboratorySouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Nguyen:2016:12/125012,
author = {Nguyen, N and Maier, SA and Hong, M and Oulton, RF},
doi = {12/125012},
journal = {New Journal of Physics},
title = {Recovering parity-time symmetry in highly dispersive coupled optical waveguides},
url = {http://dx.doi.org/10.1088/1367-2630/18/12/125012},
volume = {18},
year = {2016}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - Coupled photonic systems satisfying parity-time symmetry (PTS) provideexibility to engineer the ow of light including non-reciprocal propagation, perfectlaser-absorbers, and ultra-fast switching. Achieving the required index pro le foran optical system with ideal PTS, i.e. n(x) =n(-x), has proven to be difficult due to the challenge of controlling gain, loss and material dispersion simultaneously. Consequently, most research has focused on dilute or low gain optical systems where material dispersion is minimal. In this paper, we study a model system of coupled inorganic semiconductor waveguides with potentially high gain (>1,500 cm-1) and dispersion. Our analysis makes use of coupled mode theory's parameters to quantify smooth transitions between PTS phases under imperfect conditions. We find that the detrimental influence of gain-induced dispersion is counteracted and the key features of parity-time symmetric optical systems are recovered by working with non-identical waveguides and bias pumping of the optical waveguides. Our coupled mode theory results show excellent agreement with numerical solutions, proving the robustness of coupled mode theory in describing various degrees of imperfection in systems with PTS.
AU  - Nguyen,N
AU  - Maier,SA
AU  - Hong,M
AU  - Oulton,RF
DO  - 12/125012
PY  - 2016///
SN  - 1367-2630
TI  - Recovering parity-time symmetry in highly dispersive coupled optical waveguides
T2  - New Journal of Physics
UR  - http://dx.doi.org/10.1088/1367-2630/18/12/125012
UR  - http://hdl.handle.net/10044/1/42556
VL  - 18
ER  -
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