Efficient coupling of light into and out of a photonic crystal waveguide via surface modes

✍ Scribed by Esteban Moreno; L. Martín-Moreno; F.J. García-Vidal

• Publisher: Elsevier Science
• Year: 2004
• Tongue: English
• Weight: 274 KB
• Volume: 2
• Category: Article
• ISSN: 1569-4410
• DOI: 10.1016/j.photonics.2004.07.009

✦ Synopsis

In this paper, we show how the coupling of light into a photonic crystal waveguide can be greatly enhanced by creating a periodic modulation in the dielectric structure surrounding the entrance of the waveguide. In this way, surface modes supported by the system can funnel the light that impinges onto the surface into the interior of the waveguide. Moreover, we also demonstrate that the shape and direction of the beam that emerges from the structure can be tailored by constructing a periodic corrugation near the exit side of the waveguide.