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Article
Optical polariton properties in ZnSe-based planar and pillar structured microcavities
Strong coupling is demonstrated in monolithic ZnSe-based microcavities. Under nonresonant excitation the polariton dispersion has been investigated in dependence on the photon-exciton detuning for different e...
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Chapter
Wide-Bandgap Quantum Dot Based Microcavity VCSEL Structures
In this contribution we report on the optical properties of planar and pillar structured GaN- and ZnSe-based monolithic microcavities. These structures reveal three-dimensional confined optical modes with high...
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Article
Spatially Resolved Characterization of Plastic Deformation Induced by Focused-Ion Beam Processing in Structured InGaN/GaN Layers
In this study the results of polychromatic X-ray microbeam analysis (PXM) of the structural changes caused by FIB in nitride heterostructures are presented and discussed in connection with micro-photoluminesce...
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Article
Comparative investigation of quantum-dot-like localization centers in InGaN quantum well and quantum dot structures
We present comparative micro-photoluminescence measurements on InGaN/GaN quantum well and quantum dot samples. Single sharp emission lines were investigated for both kinds of samples as a function of temperatu...
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Article
Microphotoluminescence Studies on Single GaN Nanocolumns
We present comparative micro-photoluminescence measurements on ensembles and isolated single GaN nanocolumns. The samples were prepared in a top-down approach by etching compact GaN layers grown on Si(111) and...
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Article
Resonant modes in monolithic nitride pillar microcavities
GaN-based airpost pillar microcavities are realized by focused-ion beam etching starting from an all-epitaxially grown vertical-cavity surface-emitting laser structure. Pillar diameters below 1 μm are well co...
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Article
Micro-photoluminescence studies of excitonic and multiexcitonic states of quantum dot-like localization centers in InGaN/GaN structures
We present micro-photoluminescence measurements on unstructured InGaN/GaN quantum well samples. Single sharp emission lines were observed and their optical properties were studied as a function of temperature ...