Leaky waveguide modes along the edge of a dielectric wedge | Zendy

Tobias Maletzky | Zendy; Kazuo Tanaka | Zendy; Thierry Grosjean | Zendy; U. C. Fischer | Zendy

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Leaky waveguide modes along the edge of a dielectric wedge

Author(s) -

Tobias Maletzky,

Kazuo Tanaka,

Thierry Grosjean,

U. C. Fischer

Publication year - 2009

Publication title -

optics letters

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.524

H-Index - 272

eISSN - 1071-2763

pISSN - 0146-9592

DOI - 10.1364/ol.34.001909

Subject(s) - optics , slab , gaussian beam , wedge (geometry) , total internal reflection , refractive index , waveguide , dielectric , enhanced data rates for gsm evolution , materials science , reflection (computer programming) , beam (structure) , physics , optoelectronics , telecommunications , geophysics , computer science , programming language

It is shown experimentally that a Gaussian beam focused from within a finite wedge onto its edge at an angle of total reflection excites a leaky waveguide mode propagating along the edge. This newly described phenomenon is interpreted in terms of waveguide modes of a tapered dielectric slab of a mode index, which is known to decrease with slab thickness. This decrease in the refractive index leads to a gradual refraction of the incident beam parallel to the edge. A numerical simulation of a focused Gaussian beam incident on a finite dielectric wedge gives a full account of this phenomenon.

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