Homoepitaxial nonpolar (10-10) ZnO/ZnMgO monolithic microcavities: Towards reduced photonic disorder

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 impo...

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Bibliographic Details
Published in:Applied physics letters 2016-06, Vol.108 (25)
Main Authors: Zuniga-Perez, J., Kappei, L., Deparis, C., Reveret, F., Grundmann, M., de Prado, E., Jamadi, O., Leymarie, J., Chenot, S., Leroux, M.
Format: Article
Language:English
Subjects:
ANISOTROPY
Applied physics
Bragg reflectors
CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS
Epitaxial growth
Heterostructures
LAYERS
Microcavities
MILLI EV RANGE
MOLECULAR BEAM EPITAXY
Photonics
PLASMA
POLARIZATION
Q factors
QUALITY FACTOR
REFLECTIVITY
SPECTRA
SUBSTRATES
SURFACES
Zinc oxide
ZINC OXIDES
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Summary: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 μm 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.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.4954796