Giant birefringence is demonstrated in ensembles of randomly grown, vertically aligned semiconductor nanowires. Bottom-up fabrication of epitaxial semiconductor nanowires grown using the vapor-liquid-solid mechanism yields a highly anisotropic photonic metamaterial. The birefringence in the material is shown to depend on the nanowire length. Short nanowires with a volume filling fraction around 50% exhibit the strongest birefringence, in agreement with effective medium theories. A large difference is found between the in-plane and out-of-plane refractive indices of , exceeding by a factor of 75 the natural birefringence of quartz and by more than a factor of 2 that of inverted artificial materials.
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Research Article| December 07 2006
Giant optical birefringence in ensembles of semiconductor nanowires
O. L. Muskens;
M. T. Borgström;
E. P. A. M. Bakkers;
O. L. Muskens, M. T. Borgström, E. P. A. M. Bakkers, J. Gómez Rivas; Giant optical birefringence in ensembles of semiconductor nanowires. Appl. Phys. Lett. 4 December 2006; 89 (23): 233117. https://doi.org/10.1063/1.2402906
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