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Localized modes in a defectless photonic crystal waveguide at terahertz frequencies |
Optics Letters, Vol. 37, Issue 13, pp. 2727-2729 (2012)
http://dx.doi.org/10.1364/OL.37.002727
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Abstract
We propose an idea to excite localized modes in a photonic crystal (PC) waveguide without ruining the discrete translational symmetry of the lattice. This can be done by arranging dispersive elements having negative permittivity over a desired frequency range into a periodic structure. We demonstrate numerically the realization of a cavity mode inside the air region of a geometrical defectless two-dimensional square-lattice PC consisting of polaritonic cylinders placed in air matrix. The corresponding waveguide structure in the form of a PC fiber supports the cavity mode as a guided mode to propagate along the guiding direction at very small propagation constant with near zero group velocity. These localized modes can be recognized as localized defectless modes inside the structure with four-fold symmetry.
© 2012 Optical Society of America
OCIS Codes
(130.0130) Integrated optics : Integrated optics
(260.0260) Physical optics : Physical optics
(260.2110) Physical optics : Electromagnetic optics
(130.5296) Integrated optics : Photonic crystal waveguides
ToC Category:
Integrated Optics
History
Original Manuscript: February 16, 2012
Revised Manuscript: May 3, 2012
Manuscript Accepted: May 5, 2012
Published: June 27, 2012
Citation
Amir H. Baradaran Ghasemi and Hamid Latifi, "Localized modes in a defectless photonic crystal waveguide at terahertz frequencies," Opt. Lett. 37, 2727-2729 (2012)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-37-13-2727
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