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Photonic crystals are artificial structures having a periodic dielectric structure designed to influence the behaviour of photons in much the same way that the crystal structure of a semiconductor affects the properties of electrons *RF 1*. In particular, photonic crystals forbid propagation of photons having a certain range of energies (known as a photonic bandgap), a property that could be incorporated in the design of novel optoelectronic devices . Following the demonstration of a material with a full photonic bandgap at microwave frequencies , there has been considerable progress in the fabrication of three-dimensional photonic crystals with operational wavelengths as short as 1.5 micrometer , although the optical properties of such structures are still far from ideal . Here we show that, by restricting the geometry of the photonic crystal to two dimensions (in a waveguide configuration), structures with polarization-sensitive photonic bandgaps at still lower wavelengths (in the range 800-900 nm) can be readily fabricated. Our approach should permit the straightforward integration of photonic-bandgap structures with other optical and optoelectronic devices.
|Glasgow Author(s) Enlighten ID:||De La Rue, Professor Richard|
|Authors:||Krauss, T. F., De La Rue, R. M., and Brand, S.|
|Subjects:||T Technology > TA Engineering (General). Civil engineering (General)|
|College/School:||College of Science and Engineering > School of Engineering > Electronics and Nanoscale Engineering|
|Publisher:||Nature Publications Group|
|Copyright Holders:||© Copyright Macmillan Magazines Ltd|
|First Published:||First published in Nature 383:699-702|
|Publisher Policy:||Reproduced with the permission of the Publisher.|
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