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Tachyonic dispersion in coherent networks.
- Source :
-
Journal of Optics . Jan2016, Vol. 18 Issue 1, p1-1. 1p. - Publication Year :
- 2016
-
Abstract
- We propose a technique to realize a tachyonic band structure in a coherent network, such as an array of coupled ring resonators. This is achieved by adding ‘PT symmetric’ spatially balanced gain and loss to each node of the network. In a square-lattice network, the quasi-energy bandstructure exhibits a tachyonic dispersion relation, centered at either the center or corner of the Brillouin zone. There is one tachyonic hyperboloid in each gap, unlike in PT-symmetric tight-binding honeycomb lattices where the hyperboloids occur in pairs. The dispersion relation can be probed by measuring the peaks in transmission across a finite network as the gain/loss parameter is varied. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 20408978
- Volume :
- 18
- Issue :
- 1
- Database :
- Academic Search Index
- Journal :
- Journal of Optics
- Publication Type :
- Academic Journal
- Accession number :
- 111884832
- Full Text :
- https://doi.org/10.1088/2040-8978/18/1/014001