Beaming effect and directional emission from photonic-crystal waveguides

Steven K. Morrison; Yuri S. Kivshar

doi:10.1117/12.588484

13 April 2005 Beaming effect and directional emission from photonic-crystal waveguides

Steven K. Morrison, Yuri S. Kivshar

Proceedings Volume 5733, Photonic Crystal Materials and Devices III; (2005) https://doi.org/10.1117/12.588484
Event: Integrated Optoelectronic Devices 2005, 2005, San Jose, California, United States

Abstract

It is known that free-space focusing of light from sub-wavelength apertures, the so-called beaming effect of light, can be achieved through the excitation of radiative surface modes and their subsequent constructive interference in space surrounding the apertures. This effect, studied extensively in metallic thin films, has recently been shown to exist in photonic-crystal structures. In this paper, we present a comprehensive study of the beaming effect and light directional emission achieved through simple geometric and material engineering of the surface and near-surface structures in two types of photonic-crystal waveguides, classified as increased- and decreased-index structures. We analyze different methods to enhance the directional emission and calculate the resulting efficiencies, highlighting the influence of reflections and matching conditions at the waveguide terminations.

Citation Download Citation

Steven K. Morrison and Yuri S. Kivshar "Beaming effect and directional emission from photonic-crystal waveguides", Proc. SPIE 5733, Photonic Crystal Materials and Devices III, (13 April 2005); https://doi.org/10.1117/12.588484

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