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APS » Journals » Phys. Rev. B » Volume 69 » Issue 12
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Phys. Rev. B 69, 121402(R) (2004) [4 pages]

Enhanced transmission and beaming of light via photonic crystal surface modes

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Esteban Moreno1,2,*, F. J. García-Vidal2, and L. Martín-Moreno3
1Laboratory for Electromagnetic Fields and Microwave Electronics, Swiss Federal Institute of Technology, ETH-Zentrum, CH-8092 Zurich, Switzerland
2Departamento de Física Teórica de la Materia Condensada, Universidad Autónoma de Madrid, E-28049 Madrid, Spain
3Departamento de Física de la Materia Condensada, Universidad de Zaragoza-CSIC, E-50009 Zaragoza, Spain

Received 27 October 2003; revised 29 December 2003; published 9 March 2004

See accompanying Physics Focus

Surface modes are generally believed to be an undesirable feature of finite photonic crystals (PC), unlike point or line defect modes. However, it is possible to make the surface mode radiate by appropriate corrugation of the PC interface. In this paper we show theoretically that the coherent action of these surface indentations can be engineered to collimate within a few degrees the light exiting a PC waveguide, or to funnel light coming from free space into the waveguide.

© 2004 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevB.69.121402
DOI:
10.1103/PhysRevB.69.121402
PACS:
42.70.Qs, 78.20.Ci, 42.79.Ag

*Electronic address: esteban.moreno@uam.es

 
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