Grating induced transparency (GIT) and the dark mode in optical waveguides

We propose and describe a new class of optical modes consisting of superposition of three waveguide modes which can be supported by a few-mode waveguide spatially modulated by two co-spatial gratings. These supermodes bear a close, but not exact, formal analogy to the three-level quantum states invo...

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Bibliographic Details
Published in:Optics express 2009-07, Vol.17 (14), p.11710-11718
Main Authors: Liu, Hsi-Chun, Yariv, Amnon
Format: Article
Language:English
Subjects:
Algorithms
Electromagnetic Phenomena
Equipment Design
Image Processing, Computer-Assisted
Lasers
Light
Models, Statistical
Optical Devices
Optics and Photonics
Quantum Theory
Refractometry
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Summary:We propose and describe a new class of optical modes consisting of superposition of three waveguide modes which can be supported by a few-mode waveguide spatially modulated by two co-spatial gratings. These supermodes bear a close, but not exact, formal analogy to the three-level quantum states involved in EIT and its attendant slow light propagation characteristics. Of particular interest is the supermode which we call the dark mode in which, in analogy with the dark state of EIT, one of the three uncoupled waveguide modes is not excited. This mode has unique dispersion characteristics that translate into a slow light propagation which possesses high bandwidth-delay product and can form the basis for a new generation of optical resonators and lasers.
ISSN:1094-4087
1094-4087
DOI:10.1364/oe.17.011710