Dr. Christopher Koelper Profile

Dr. Christopher Koelper

at ams-OSRAM International GmbH

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Author

Publications (3)

Proceedings Article | 28 February 2012 Paper

Luminescence and efficiency optimization of InGaN/GaN core-shell nanowire LEDs by numerical modelling

Friedhard Römer, Marcus Deppner, Zhelio Andreev, Christopher Kölper, Matthias Sabathil, Martin Strassburg, Johannes Ledig, Shunfeng Li, Andreas Waag, Bernd Witzigmann

Proceedings Volume 8255, 82550H (2012) https://doi.org/10.1117/12.908207

KEYWORDS: Light emitting diodes, Quantum wells, Luminescence, Absorption, Gallium nitride, Quantum efficiency, Polarization, Internal quantum efficiency, Quantization, Nanowires

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Proceedings Article | 4 April 2011 Paper

Fabrication of hole pattern for position-controlled MOVPE-grown GaN nanorods with highly precise nanoimprint technology

Torbjörn Eriksson, Ki-Dong Lee, Babak Heidari, Patrick Rode, Werner Bergbauer, Martin Mandl, Christopher Kölper, Martin Strassburg

Proceedings Volume 7970, 797015 (2011) https://doi.org/10.1117/12.879368

KEYWORDS: Nanoimprint lithography, Gallium nitride, Nanostructures, Semiconducting wafers, Scanning electron microscopy, Etching, Silica, Nanotechnology, Manufacturing, Nanorods

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Proceedings Article | 21 February 2011 Paper

Optical properties of individual GaN nanorods for light emitting diodes: influence of geometry, materials, and facets

C. Kölper, M. Sabathil, B. Witzigmann, F. Römer, W. Bergbauer, M. Strassburg

Proceedings Volume 7933, 793314 (2011) https://doi.org/10.1117/12.874984

KEYWORDS: Gallium nitride, Interfaces, Light emitting diodes, Optical properties, Cladding, Mirrors, Silver, Refractive index, Phase shifts, Nanorods

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