Low-contrast bandgaps of a planar parabolic spiral lattice
Pollard, M. E. and Parker, G. J. (2009) Low-contrast bandgaps of a planar parabolic spiral lattice. Optics Letters, 34, (18), 2805-2807.
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Description/Abstract
We show that a planar aperiodic lattice, mimicking the appearance of a sunflower, supports photonic bandgaps for weak dielectric contrast. The pattern’s high orientational order and spatially uniform modal pitch yields an isotropic Fourier space. A 2D structure of cylinders (epsilon=2) in air possesses a wide 21% TM bandgap, versus 5.6% for a sixfold lattice or 14% for a 12-fold fractal tiling. The isotropic gap frequencies imply flat bands, and thus application in nonlinear optics and low threshold lasers, where a reduced group velocity in all directions may be desired.
| Item Type: | Article |
|---|---|
| Additional Information: | This paper was published in Optics Letters and is made available as an electronic reprint with the permission of OSA. The paper can be found at the following URL on the OSA website: http://www.opticsinfobase.org/ol/abstract.cfm?uri=ol-34-18-2805. Systematic or multiple reproduction or distribution to multiple locations via electronic or other means is prohibited and is subject to penalties under law. |
| ISSNs: | 1539-4794 |
| Divisions: | Faculty of Physical and Applied Science > Electronics and Computer Science > NANO |
| Item ID: | 268605 |
| Date Deposited: | 12 Mar 2010 20:31 |
| Last Modified: | 23 Jul 2012 04:11 |
| Contributors: | Pollard, M. E. (Author) Parker, G. J. (Author) |
| Date: | 10 September 2009 |
| Additional Information: | This paper was published in Optics Letters and is made available as an electronic reprint with the permission of OSA. The paper can be found at the following URL on the OSA website: http://www.opticsinfobase.org/ol/abstract.cfm?uri=ol-34-18-2805. Systematic or multiple reproduction or distribution to multiple locations via electronic or other means is prohibited and is subject to penalties under law. |
| Status: | Published |
| Publisher: | Optical Society of America |
| Contact Email Address: | mep06r@ecs.soton.ac.uk |
| Further Information: | Google Scholar |
| ISI Citation Count: | 11 |
| URI: | http://eprints.soton.ac.uk/id/eprint/268605 |
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