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Proceedings Paper

PT-symmetry and kagome lattices (Conference Presentation)
Author(s): Avadh Saxena; Gia-Wei Chern
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Paper Abstract

We consider a complex photonic lattice by placing PT-symmetric dimers at the Kagome lattice points. This lattice is a two-dimensional network of corner-sharing triangles. Each dimer represents a pair of strongly coupled waveguides. The frustrated coupling between waveguide modes results in a dispersionless flat band comprising spatially localized modes. For a balanced arrangement of gain and loss on each dimer, up to a critical value of the gain/loss parameter the system exhibits a PT-symmetric phase. The beam evolution in the waveguide array leads to an oscillatory rotation of the optical power. We observe local chiral structures with a narrow beam excitation. We also study nonlinearity and disorder in this set up.

Paper Details

Date Published: 9 November 2016
PDF: 1 pages
Proc. SPIE 9920, Active Photonic Materials VIII, 99201N (9 November 2016); doi: 10.1117/12.2237920
Show Author Affiliations
Avadh Saxena, Los Alamos National Lab. (United States)
Gia-Wei Chern, Univ. of Virginia (United States)

Published in SPIE Proceedings Vol. 9920:
Active Photonic Materials VIII
Ganapathi S. Subramania; Stavroula Foteinopoulou, Editor(s)

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