Journal
APPLIED PHYSICS LETTERS
Volume 108, Issue 25, Pages -Publisher
AIP Publishing
DOI: 10.1063/1.4954796
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- Ministerio de Economia y Competitividad [EEBB-I-15-09749]
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Nonpolar ZnO/ZnMgO-based optical microcavities have been grown on (10-10) m-plane ZnO substrates by plasma-assisted molecular beam epitaxy. Reflectivity measurements indicate an exponential increase of the cavity quality factor with the number of layers in the distributed Bragg reflectors. Most importantly, microreflectivity spectra recorded with a spot size in the order of 2 mu m show a negligible photonic disorder (well below 1 meV), leading to local quality factors equivalent to those obtained by macroreflectivity. The anisotropic character of the nonpolar heterostructures manifests itself both in the surface features, elongated parallel to the in-plane c direction, and in the optical spectra, with two cavity modes being observed at different energies for orthogonal polarizations. Published by AIP Publishing.
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