Propagation phenomena in a multilayer waveguide

Wing-Ying Kwong

doi:10.1117/12.431589

18 June 2002 Propagation phenomena in a multilayer waveguide

Wing-Ying Kwong

Proceedings Volume 4640, Integrated Optics: Devices, Materials, and Technologies VI; (2002) https://doi.org/10.1117/12.431589
Event: Symposium on Integrated Optoelectronic Devices, 2002, San Jose, California, United States

Abstract

Periodic structures play an important role in integrated optics. The main purpose of this paper is to study electromagnetic radiation propagating in a one-dimensional periodic dielectric waveguide; or equivalently, in a simple multilayer waveguide. Since periodic dielectrics are photonic crystals, it is beneficial to study their symmetry and periodicity first: inversion, translation, rotation, mirror reflection and time-reversal symmetries; dispersion relations and their behavior of band-pass filters. These principles help us in understanding the propagation of light modes in a periodic layered medium. This simple system exhibits interesting phenomena: photonic band-gaps, localized modes at defects, surface states and omnidirectional reflection, that appear in many optical components, such as diffraction gratings, distributed-feedback lasers, optical waveguides and optical filters. When the periodic dielectric medium is bounded, it becomes a waveguide and light modes that propagate within become guided bodes. Some general and fundamental properties of dielectric waveguide modes are briefly described. Then, by treating the periodic dielectric waveguide as a dielectric perturbed waveguide, propagation of electromagnetic radiation within may be described using the method of variation of constants approach, which formulates the coupled-mode theory. For significant mode coupling, the Bragg reflection type is studied. Finally, more complicated multilayer waveguide structures are briefly mentioned.

Citation Download Citation

Wing-Ying Kwong "Propagation phenomena in a multilayer waveguide", Proc. SPIE 4640, Integrated Optics: Devices, Materials, and Technologies VI, (18 June 2002); https://doi.org/10.1117/12.431589

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KEYWORDS

Waveguides

Dielectrics

Wave propagation

Radio propagation

Reflection

Mirrors

Multilayers

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