Omnidirectional optical mirror in a cladded-superlattice structure
- 25 February 2002
- journal article
- research article
- Published by AIP Publishing in Journal of Applied Physics
- Vol. 91 (5), 2569-2572
- https://doi.org/10.1063/1.1433188
Abstract
In recent years, it has been shown that one-dimensional photonic crystals such as superlattices can exhibit an omnidirectional reflection of light for a given frequency range. However, this property requires that the incident wave be launched from vacuum or from a low refractive index material. In this article, we show that the limitation about the choice of the substrate can be removed by adding a clad layer of low refractive index at one boundary of the superlattice. The additional layer acts like a barrier for the propagation of light. An alternative solution based on a combination of two multilayer structures is also mentioned.Keywords
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