Prof. Christian Karnutsch Profile

Prof. Christian Karnutsch

Professor of Optical Sensor Systems at Hochschule Karlsruhe Technik und Wirtschaft

SPIE Involvement:

Author

Area of Expertise:

Optofluidics , Selective nanoinfiltration , UV nanoimprint Lithography , Organic semiconductor lasers , Blood analysis

Websites:

Company Website

Publications (19)

SPIE Journal Paper | 27 June 2017

Tunable air-suspended polymer grating couplers

Christoph Prokop, Tobias Schmalz, Philipp Kleessen, Bert Laegel, Sandra Wolff, Arnan Mitchell, Christian Karnutsch

OE, Vol. 56, Issue 06, 067112, (June 2017) https://doi.org/10.1117/12.10.1117/1.OE.56.6.067112

KEYWORDS: Polymers, Polymer multimode waveguides, Waveguides, Numerical simulations, Temperature metrology, Thermal optics

Read Abstract +

Proceedings Article | 27 February 2015 Paper

Air-suspended polymer rib waveguides

Christoph Prokop, Philipp Kleeßen, Nico Irmler, Arnan Mitchell, Christian Karnutsch

Proceedings Volume 9365, 93650T (2015) https://doi.org/10.1117/12.2079207

KEYWORDS: Waveguides, Polymers, Polymer multimode waveguides, Polymer thin films, Visible radiation, Cladding, Wave propagation, Refractive index, Beam propagation method, Ions

Read Abstract +

Proceedings Article | 17 February 2010 Paper

Waveguide-based optofluidics

Christian Karnutsch, Snjezana Tomljenovic-Hanic, Christelle Monat, Christian Grillet, Peter Domachuk, Ross McPhedran, Benjamin Eggleton, Liam O'Faolain, Thomas Krauss, Sanshui Xiao, Niels Mortensen

Proceedings Volume 7606, 760615 (2010) https://doi.org/10.1117/12.839822

KEYWORDS: Waveguides, Liquids, Refractive index, Microfluidics, Silicon, Optical microcavities, Dispersion, Optical components, Sensors, Thermal optics

Read Abstract +

Proceedings Article | 18 February 2009 Paper

Reconfigurable optofluidic silicon-based photonic crystal components

Christian Karnutsch, Uwe Bog, Cameron Smith, Snjezana Tomljenovic-Hanic, Christian Grillet, Christelle Monat, Liam O’Faolain, Tom White, Thomas Krauss, Ross McPhedran, Benjamin Eggleton

Proceedings Volume 7220, 72200K (2009) https://doi.org/10.1117/12.811083

KEYWORDS: Waveguides, Microfluidics, Refractive index, Liquids, Photonic crystals, Optical microcavities, Silicon, Microfluidic imaging, Dispersion, Sensors

Read Abstract +

Proceedings Article | 5 January 2009 Paper

Lithographically defined intersecting optical waveguides and fluidic channels

Tanveer Mahmud, Eike Zeller, Christian Karnutsch, Arnan Mitchell

Proceedings Volume 7269, 72690F (2009) https://doi.org/10.1117/12.814124

KEYWORDS: Waveguides, Microfluidics, Positron emission tomography, Photomasks, Rhodamine, Silicon, Cladding, Silicon films, Fabrication, Adhesives

Read Abstract +

Proceedings Article | 16 October 2007 Paper

Loss processes in organic double-heterostructure laser diodes

Christian Gärtner, Christian Karnutsch, Jan Brückner, Nico Christ, Stephan Uebe, Uli Lemmer, Patrick Görrn, Torsten Rabe, Thomas Riedl, Wolfgang Kowalsky

Proceedings Volume 6655, 66550T (2007) https://doi.org/10.1117/12.733686

KEYWORDS: Excitons, Absorption, Polarons, Semiconductor lasers, Signal attenuation, Atmospheric particles, Laser damage threshold, Organic materials, Refractive index, Electron transport

Read Abstract +

Proceedings Article | 12 September 2007 Paper

Organic semiconductor lasers as integrated light sources for optical sensor systems

Martin Punke, Thomas Woggon, Marc Stroisch, Bernd Ebenhoch, Ulf Geyer, Christian Karnutsch, Martina Gerken, Uli Lemmer, Mathias Bruendel, Jing Wang, Thomas Weimann

Proceedings Volume 6659, 665909 (2007) https://doi.org/10.1117/12.733165

KEYWORDS: Semiconductor lasers, Waveguides, Nanoimprint lithography, Laser resonators, Polymethylmethacrylate, Ultraviolet radiation, Laser damage threshold, Organic semiconductors, Resonators, Polymers

Read Abstract +

Proceedings Article | 6 December 2006 Paper

Numerical study of annihilation processes in electrically pumped organic semiconductor laser diodes

Christian Gärtner, Christof Pflumm, Christian Karnutsch, Veronika Haug, Uli Lemmer

Proceedings Volume 6333, 63331J (2006) https://doi.org/10.1117/12.680370

KEYWORDS: Excitons, Semiconductor lasers, Laser damage threshold, Surface plasmons, Organic semiconductors, Electrons, Polarons, Waveguides, Laser processing, Particles

Read Abstract +

Proceedings Article | 5 December 2006 Paper

Influence of electronic properties on the threshold behaviour of organic laser diode structures

Christof Pflumm, Christian Gärtner, Christian Karnutsch, Uli Lemmer

Proceedings Volume 6333, 63330W (2006) https://doi.org/10.1117/12.680733

KEYWORDS: Excitons, Semiconductor lasers, Electroluminescence, Laser damage threshold, Organic semiconductors, Particles, Electron transport, Organic light emitting diodes, Absorption, Electrodes

Read Abstract +

Proceedings Article | 17 November 2005 Paper

Organic semiconductor distributed feedback lasers

W. Kowalsky, T. Rabe, D. Schneider, H.-H. Johannes, C. Karnutsch, M. Gerken, U. Lemmer, J. Wang, T. Weimann, P. Hinze, T. Riedl

Proceedings Volume 6008, 60080Z (2005) https://doi.org/10.1117/12.637436

KEYWORDS: Laser damage threshold, Thin films, Semiconductor lasers, Luminescence, Resonators, Organic light emitting diodes, Absorption, Organic semiconductors, Doping, Molecules

Read Abstract +

Compared to well established liquid based dye lasers, amplifying media based on amorphous organic thin films allow the realisation of versatile, cost effective and compact lasers. Aside from that, the materials involved are organic semiconductors, which in principle allow the fabrication of future electrically driven organic laser diodes. A highly promising, low-loss resonator geometry for these lasers is the distributed feedback (DFB) structure, which is based on a periodic modulation of the refractive index in the waveguide on the nanometer scale. By variation of the grating period Λ one may tune the laser emission within the gain spectrum of the amplifying medium. We will demonstrate organic lasers spanning the entire spectral region from 360-715 nm. Tuning ranges as large as 115 nm (λ = 598-713 nm) in the red spectral region and more than 30 nm (λ = 362-394 nm) in the UV render these novel lasers highly attractive for various spectroscopic applications. As the grating period Λ is typically between 100 nm and 400 nm the DFB resonators are fabricated by e-beam lithography. These gratings may, however, be used as masters to obtain an arbitrary amount of copies by nanoimprint lithography into plastic substrates. Therefore these lasers are very attractive even for single-use applications (e.g. in medicine and biotechnology). Today, the key challenge in the field is the realisation of the first electrically driven organic laser. Key pre-requisites are highly efficient amplifying material systems which allow for low threshold operation and charge transport materials that bring about the stability to sustain the necessary current densities, several orders of magnitude higher than in OLEDs. We will demonstrate diode structures operated electrically under pulsed conditions at current densities up to 760 A/cm² with a product of the current density and the external quantum effciency (J×η_ext) of 1.27 A/cm². Mechanisms deteriorating the quantum efficieny at elevated current densities will be discussed.

Proceedings Article | 8 October 2005 Paper

Modelling of the laser dynamics of electrically pumped organic semiconductor laser diodes

Christof Pflumm, Christian Karnutsch, René Boschert, Martina Gerken, Uli Lemmer, John deMello, Donal D.C. Bradley

Proceedings Volume 5937, 59370X (2005) https://doi.org/10.1117/12.616907

KEYWORDS: Excitons, Semiconductor lasers, Refractive index, Laser damage threshold, Waveguides, Absorption, Organic semiconductors, Electroluminescence, Electrons, Electrodes

Read Abstract +

Proceedings Article | 10 November 2004 Paper

Numerical simulation of modal gain in electrically pumped organic semiconductor lasers

Christof Pflumm, Christian Karnutsch, Martina Gerken, Uli Lemmer

Proceedings Volume 5519, (2004) https://doi.org/10.1117/12.560944

KEYWORDS: Absorption, Electrons, Polarons, Excitons, Semiconductor lasers, Organic semiconductors, Particles, Diffusion, Numerical simulations, Organic light emitting diodes

Read Abstract +

Proceedings Article | 3 July 2003 Paper

Absorption of guided modes in light-emitting diodes

Sven-Silvius Schad, Barbara Neubert, Matthias Seyboth, Frank Habel, Christoph Eichler, Marcus Scherer, Peter Unger, Wolfgang Schmid, Christian Karnutsch, Klaus Streubel

Proceedings Volume 4996, (2003) https://doi.org/10.1117/12.476552

KEYWORDS: Absorption, Light emitting diodes, Waveguides, Interfaces, Scattering, Sensors, Dispersion, Light scattering, Wave propagation, Reflection

Read Abstract +

Proceedings Article | 3 July 2003 Paper

Wafer-bonded thin-film surface-roughened light-emitting diodes

Cathleen Rooman, Stijn De Jonge, Christian Karnutsch, Klaus Streubel, Maarten Kuijk, Barundeb Dutta, Gustaaf Borghs, Paul Heremans

Proceedings Volume 4996, (2003) https://doi.org/10.1117/12.476566

KEYWORDS: Light emitting diodes, External quantum efficiency, Thin films, Quantum efficiency, Mirrors, Internal quantum efficiency, Metals, Temperature metrology, Semiconductors, Reflection

Read Abstract +

Proceedings Article | 3 July 2003 Paper

Recent progress of AlGaInP thin-film light-emitting diodes

Ralph Wirth, Stefan Illek, Christian Karnutsch, Ines Pietzonka, Andreas Ploessl, Peter Stauss, Wilhelm Stein, Walter Wegleiter, Reiner Windisch, Heribert Zull, Klaus Streubel

Proceedings Volume 4996, (2003) https://doi.org/10.1117/12.476582

KEYWORDS: Light emitting diodes, Mirrors, Thin films, Reflectivity, Semiconducting wafers, Absorption, Semiconductors, Gold, Aluminium gallium indium phosphide, Dielectrics

Read Abstract +

Proceedings Article | 6 June 2002 Paper

Efficient InAlGaP light-emitting diodes using radial outcoupling taper

Marcus Scherer, Barbara Neubert, Sven-Silvius Schad, Wolfgang Schmid, Christian Karnutsch, Walter Wegleiter, Andreas Ploessl, Klaus Streubel

Proceedings Volume 4641, (2002) https://doi.org/10.1117/12.469214

KEYWORDS: Light emitting diodes, Absorption, External quantum efficiency, Semiconductors, Quantum efficiency, Mirrors, Gold, Etching, Aluminum, Reflection

Read Abstract +

Proceedings Article | 6 June 2002 Paper

Thin-film surface-textured LEDs with current injection through a rear reflector

Reiner Windisch, Cathleen Rooman, Stijn De Jonge, Christian Karnutsch, Klaus Streubel, Maarten Kuijk, Barundeb Dutta, Gustaaf Borghs, Paul Heremans

Proceedings Volume 4641, (2002) https://doi.org/10.1117/12.469212

KEYWORDS: Light emitting diodes, Thin films, Resistance, External quantum efficiency, Mirrors, Reflectors, Quantum efficiency, Gold, Gallium arsenide, Etching

Read Abstract +

Proceedings Article | 4 June 2002 Paper

Optically pumped semiconductor thin-disk laser with external cavity operating at 660 nm

Moritz Mueller, Norbert Linder, Christian Karnutsch, Wolfgang Schmid, Klaus Streubel, Johann Luft, Svent-Simon Beyertt, Adolf Giesen, Gottfried Doehler

Proceedings Volume 4649, (2002) https://doi.org/10.1117/12.469242

KEYWORDS: Semiconductor lasers, Quantum wells, Absorption, Semiconductors, Mirrors, Reflectivity, Optical pumping, Optical semiconductors, Pulsed laser operation, Aluminium gallium indium phosphide

Read Abstract +

Proceedings Article | 14 May 2001 Paper

Red and orange resonant-cavity LEDs

Ralph Wirth, Christian Karnutsch, Siegmar Kugler, Simone Thaler, Klaus Streubel

Proceedings Volume 4278, (2001) https://doi.org/10.1117/12.426855

KEYWORDS: Mirrors, Light emitting diodes, Quantum wells, Reflectivity, Aluminium gallium indium phosphide, Epoxies, Aluminum, Gallium, Fabry–Perot interferometers, Absorption

Read Abstract +

Showing 5 of 19 publications

View contact details

UPDATE YOUR PROFILE

Is this your profile? Update it now.

Sign into your SPIE.org account

Don’t have a profile and want one?

Create an account on SPIE.org

Keywords/Phrases

Search In:

Publication Years