Self-Trapped Band and Semi-Opening Movable Cavity

Localization of light is usually achieved by external mechanisms, such as metallic reflection, photonic bandgap, and total internal reflections. Here, we propose a new concept about localization of electromagnetic waves, named self-trapped state. We design an ordinary photonic crystal waveguide with...

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Bibliographic Details
Published in:IEEE journal of quantum electronics 2016-07, Vol.52 (7), p.1-7
Main Authors: Hu, Jian-Xia, Fang, Yun-Tuan
Format: Article
Language:English
Subjects:
Arrays
Dispersion
Electromagnetic waves
Holes
Light localization
Localization
magneto-optical effect
Optical surface waves
Optical waveguides
Optics
Photonic band gap
photonic crystal
Photonic crystals
Position (location)
Reflection
semi-opening cavity
Waveguides
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Summary:Localization of light is usually achieved by external mechanisms, such as metallic reflection, photonic bandgap, and total internal reflections. Here, we propose a new concept about localization of electromagnetic waves, named self-trapped state. We design an ordinary photonic crystal waveguide with two array rods made of magneto-optical media on its two sides. The waveguide modes form a self-trapped band in which electromagnetic waves are trapped. The trapping does not rely on the external mechanisms; instead, it comes from band's own properties. Based on the self-trapped band, the virtual reflection walls and semi-opening cavity can be achieved. The semi-opening cavity has some unique advantages compared with ordinary cavities, e.g., electromagnetic field in it can be either trapped or released; its position and the field amplification in it are tunable. Our study opens a new research door for the combining of magneto-optical materials and photonic crystals.
ISSN:0018-9197
1558-1713
DOI:10.1109/JQE.2016.2569458