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  • Quantum Electronics and Laser Science Conference
  • OSA Technical Digest (Optica Publishing Group, 2002),
  • paper JThB5

Waveguiding in Low Index Photonic Crystals

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Abstract

The control of light on a micrometer scale is a subject of active research in contemporary optics. In this context many experimental efforts have focused on the investigation of photonic crystals (PCs). Their inherent potential to suppress light propagation into certain or all directions makes them attractive as new artificial materials for numerous optical applications. In particular waveguides embedded into PCs are predicted to have completely new and exciting properties. Most of the recent experimental studies have concentrated on semiconductors. Their high index contrast with respect to air results in complete gaps in a wide spectral range, therefore allowing for an efficient suppression of radiative losses e.g. in bends and splitters. However, also major problems are caused by the choice of this material system. In particular high losses result from scattering, residual absorption and index mismatch at the fiber-pc interface. Thus, the use of amorphous low index materials, like Nb2O5 and SiO2, has potential advantages. Losses are usually smaller, mature fabrication technologies exist and they fit much better to the well established fiber technology. In this contribution we experimentally demonstrate that waveguiding along defect channels in PC films made from low index materials is possible.

© 2002 Optical Society of America

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