Prof. Martina Gerken Profile

Prof. Martina Gerken

Professor at Kiel Univ

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Publications (24)

Proceedings Article | 7 March 2022 Presentation + Paper

Beamforming OLEDs for sensing applications employing a nanostructured fluorescent waveguide layer

Janek Buhl, Hannes Lüder, Tim Nolte, Fynn Ole Sbrisny, Martina Gerken

Proceedings Volume 11998, 1199802 (2022) https://doi.org/10.1117/12.2608647

KEYWORDS: Waveguides, Organic light emitting diodes, Absorption, Luminescence, OLED lighting, Nanostructures, Light sources, Sensing systems, Nanostructuring, Quenching (fluorescence)

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Proceedings Article | 4 March 2022 Presentation + Paper

Effect of localized current distributions in periodically nanostructured OLEDs on the resonant light outcoupling

Hannes Lüder, Janek Buhl, Martina Gerken

Proceedings Volume 11995, 119950A (2022) https://doi.org/10.1117/12.2606225

KEYWORDS: Electro optical modeling, Photonic crystals, Organic optoelectronics, Organic light emitting diodes, Nanostructuring, Nanostructures, OLED lighting, Finite-difference time-domain method, Finite element methods

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Proceedings Article | 1 June 2015 Paper

Imaging label-free biosensor with microfluidic system

S. Jahns, P. Glorius, M. Hansen, Y. Nazirizadeh, M. Gerken

Proceedings Volume 9518, 95180K (2015) https://doi.org/10.1117/12.2179366

KEYWORDS: Sensors, Microfluidics, Imaging systems, Blood, Proteins, Biosensors, Photonic crystals, Glasses, Plasma, Cameras

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Proceedings Article | 15 May 2014 Paper

Optical transmission measurements for in-line monitoring of turbid oil-water emulsions

Philipp Metz, Katja Dopf, Markus Aichholz, Boris Riedel, Uli Lemmer, Barbara Freudig, Clifton Zimmermann, Martina Gerken

Proceedings Volume 9141, 91410J (2014) https://doi.org/10.1117/12.2049396

KEYWORDS: Sensors, Signal attenuation, Scattering, Light scattering, Transmittance, Optical testing, Glasses, Absorption, Signal detection, Monte Carlo methods

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Proceedings Article | 2 May 2014 Paper

Thermally tunable optical aperture based on a segmented thin-film resonator

Hendrik Block, Philipp Metz, Jost Adam, Martina Gerken

Proceedings Volume 9130, 913002 (2014) https://doi.org/10.1117/12.2052135

KEYWORDS: Mirrors, Silver, Thin films, Image segmentation, Beam shaping, Resonators, Fabry–Perot interferometers, Thermography, Optical testing, Microelectromechanical systems

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Proceedings Article | 2 May 2014 Paper

On the effect of broadband, multi-angular excitation and detection in guided-mode resonance biosensors

Daniela Threm, Sabrina Jahns, Yousef Nazirizadeh, Martin Ziegler, Mirko Hansen, Hermann Kohlstedt, Jost Adam, Martina Gerken

Proceedings Volume 9127, 91270X (2014) https://doi.org/10.1117/12.2051907

KEYWORDS: Sensors, Organic light emitting diodes, Light emitting diodes, Biosensors, Finite-difference time-domain method, Glasses, Refractive index, Photonic crystals, Light sources, Water

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Proceedings Article | 30 September 2013 Paper

Miniaturized optical fiber endoscope without inertial scan for simultaneous imaging and laser microsurgery

Jost Adam, Philipp Metz, Martina Gerken, Bahram Jalali

Proceedings Volume 8842, 884204 (2013) https://doi.org/10.1117/12.2023962

KEYWORDS: Diffraction, Diffraction gratings, Optical design, Pixel resolution, Refractive index, Prisms, Laser microsurgery, Gaussian beams, Endoscopes, Endoscopy

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Proceedings Article | 11 March 2013 Paper

Elastomer-based tunable virtually imaged phased array for reconfigurable optical interconnects

Philipp Metz, Christopher Behnke, Martina Gerken, Jost Adam

Proceedings Volume 8621, 86211C (2013) https://doi.org/10.1117/12.2003483

KEYWORDS: Silver, Reflectivity, Dispersion, Phased arrays, Wavelength division multiplexing, Optical interconnects, Glasses, Thermal optics, Temperature metrology, Reflection

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SPIE Journal Paper | 1 January 2011 Open Access

Periodic nanostructuring for guided mode extraction in organic light-emitting diodes

Julian Hauss, Boris Riedel, Sebastian Gleiss, Ulf Geyer, Uli Lemmer, Martina Gerken

JPE, Vol. 1, Issue 1, 011012, (January 2011) https://doi.org/10.1117/12.10.1117/1.3544495

KEYWORDS: Organic light emitting diodes, Nanostructuring, Finite-difference time-domain method, Scattering, Glasses, Refraction, Nanolithography, Lithography, Plasma etching, Etching

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SPIE Journal Paper | 1 January 2011

Polymer light-emitting diodes with inorganic nanocomposite interlayers for efficiency enhancement

Boris Riedel, Julian Hauss, Yuxin Shen, Markus Aichholz, Uli Lemmer, Martina Gerken

JPE, Vol. 1, Issue 1, 011018, (January 2011) https://doi.org/10.1117/12.10.1117/1.3569102

KEYWORDS: Organic light emitting diodes, Nanoparticles, Luminous efficiency, Nanocomposites, Electroluminescence, Luminous efficacy, Internal quantum efficiency, Quantum efficiency, Scattering, Waveguide modes

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SPIE Journal Paper | 1 February 2008

Spontaneous emission control for communications devices - a review

Martina Gerken, Yousef Nazirizadeh

JNP, Vol. 2, Issue 01, 021795, (February 2008) https://doi.org/10.1117/12.10.1117/1.2884037

KEYWORDS: Photonic crystals, Light emitting diodes, Photons, Control systems, Optical microcavities, Dielectrics, Pollution control, Optoelectronic devices, Organic light emitting diodes, Modulation

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Proceedings Article | 2 October 2007 Paper

Organic photo detectors for an integrated thin-film spectrometer

Sabine Peters, Yunwu Sui, Felix Gloeckler, Uli Lemmer, Martina Gerken

Proceedings Volume 6765, 676503 (2007) https://doi.org/10.1117/12.736189

KEYWORDS: Sensors, Thin films, Spectroscopy, Dispersion, Photonic crystals, Glasses, Optical filters, Polymers, Photography, Biological research

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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

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Proceedings Article | 2 October 2006 Paper

Design of a 1:N switch using nonlinear optical materials in one-dimensional photonic nanostructures

Felix Glöckler, Sabine Peters, Uli Lemmer, Martina Gerken

Proceedings Volume 6393, 63930K (2006) https://doi.org/10.1117/12.686070

KEYWORDS: Refractive index, Dielectrics, Switches, Switching, Wave propagation, Organic materials, Photonic nanostructures, Thin films, Nonlinear optics, Linear filtering

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Proceedings Article | 21 April 2006 Paper

Organic semiconductor devices for micro-optical applications

Martin Punke, Steffen Mozer, Marc Stroisch, Martina Gerken, Georg Bastian, Uli Lemmer, Dominik Rabus, Patric Henzi

Proceedings Volume 6185, 618505 (2006) https://doi.org/10.1117/12.673849

KEYWORDS: Organic light emitting diodes, Waveguides, Polymers, Optical interconnects, Modulation, Polymethylmethacrylate, Organic semiconductors, Sensors, Photodiodes, Polymer multimode waveguides

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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

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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 | 17 November 2005 Paper

Dispersive photonic nanostructures for integrated sensors

Martina Gerken, Uli Lemmer

Proceedings Volume 6008, 60080W (2005) https://doi.org/10.1117/12.630827

KEYWORDS: Thin films, Dispersion, Sensors, Spectrometers, Microlens, Photonic nanostructures, Thin film devices, Beam steering, Photonic crystals, Tunable lasers

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Proceedings Article | 20 October 2005 Paper

Transmission measurements for the optical characterization of 2D-photonic crystals

Martina Gerken, René Boschert, Rainer Bornemann, Uli Lemmer, Detlef Schelle, Markus Augustin, Ernst-Bernhard Kley, Andreas Tünnermann

Proceedings Volume 5965, 59650F (2005) https://doi.org/10.1117/12.625661

KEYWORDS: Photonic crystals, Niobium, Crystals, Optical testing, Nanolithography, Scanning electron microscopy, Quartz, Nanostructuring, Optical properties, Spatial resolution

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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

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Proceedings Article | 5 October 2005 Paper

Spatial beam switching using the superprism effect in nonlinear thin-film stacks

Felix Glöckler, Martina Gerken, Uli Lemmer

Proceedings Volume 5963, 59632B (2005) https://doi.org/10.1117/12.625893

KEYWORDS: Refractive index, Thin films, Polymers, Electro optics, Switching, Beam propagation method, Optical simulations, Wave propagation, Photonic crystals, Dispersion

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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

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Proceedings Article | 25 October 2004 Paper

Photonic nanostructures for wavelength division multiplexing

Martina Gerken, David Miller

Proceedings Volume 5597, (2004) https://doi.org/10.1117/12.579946

KEYWORDS: Dispersion, Wave propagation, Wavelength division multiplexing, Interfaces, Computer simulations, Photonic nanostructures, Multiplexing, Beam propagation method, Photonic crystals, Light wave propagation

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Proceedings Article | 15 July 1999 Paper

High-accuracy optical property measurements using frequency domain technique

Martina Gerken, Gregory Faris

Proceedings Volume 3597, (1999) https://doi.org/10.1117/12.356855

KEYWORDS: Absorption, Scattering, Optical properties, Liquids, Blood, Optical testing, Scatter measurement, Sensors, Phase measurement, Light scattering

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Proceedings Article | 17 May 1999 Paper

Application of frequency domain techniques to samples with moderate scatter

Martina Gerken, Devon Godfrey, Gregory Faris

Proceedings Volume 3599, (1999) https://doi.org/10.1117/12.348366

KEYWORDS: Absorption, Scattering, Monte Carlo methods, Photons, Sensors, Phase measurement, Optical spheres, Optical properties, Light scattering, Water

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