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Phys Rev E Stat Nonlin Soft Matter Phys. 2001 Jul;64(1 Pt 2):016604. Epub 2001 Jun 19.

Coupling of impurity modes in one-dimensional periodic systems.

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  • 1Institut de Micro- et Optoélectronique, Ecole Polytechnique Fédérale de Lausanne, CH 1015, Lausanne EPFL, Switzerland.


One-dimensional periodic dielectric structures are known to exhibit band gaps because of their symmetry. Defect states can be found in the band gaps if an impurity layer is added to the lattice such that the symmetry of the structure is broken. In this paper, we consider the case where a second impurity layer is added and we discuss the existence of coupling between the two defects. We discuss the possibility of exploiting the coupling of impurity modes in the realization of tunable wavelength emitting devices and dual-wavelength vertical-cavity surface-emitting lasers.

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