Dr. Wolfgang Fritzsche Profile

Dr. Wolfgang Fritzsche

Head/Nano Biophotonics Dept at Leibniz-Institut für Photonische Technologien eV

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Author

Publications (35)

Proceedings Article | 22 December 2015 Paper

Printed circuit boards as platform for disposable lab-on-a-chip applications

Christian Leiterer, Matthias Urban, Wolfgang Fritzsche, Ewa Goldys, David Inglis

Proceedings Volume 9668, 96680X (2015) https://doi.org/10.1117/12.2202413

KEYWORDS: Microfluidics, Lab on a chip, Dielectrophoresis, Electronic components, Lithography, Biomedical optics, Luminescence, Electrodes, Metals, Yeast, Connectors

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Proceedings Article | 28 August 2015 Presentation + Paper

Dielectrophoresis based integration of nanostructures and their sensorial application

Christian Leiterer, Gerald Brönstrup, Steffen Berg, Norbert Jahr, Wolfgang Fritzsche

Proceedings Volume 9555, 95550Q (2015) https://doi.org/10.1117/12.2189235

KEYWORDS: Gold, Silicon, Electrodes, Nanostructures, Nanoparticles, Dielectrophoresis, Sensors, Absorption, Particles, Nanowires

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Proceedings Article | 21 August 2015 Presentation + Paper

Plasmonic nanoparticles sensors utilizing hybrid modes, electrical excitation, and anisotropic particles

Andre Dathe, Pavel Kliuiev, Jacqueline Jatschka, Uwe Hübner, Mario Ziegler, Matthias Thiele, Steffen Trautmann, Janina Wirth, Frank Garwe, Andrea Csaki, Ondrej Stranik, Wolfgang Fritzsche

Proceedings Volume 9550, 95500T (2015) https://doi.org/10.1117/12.2190102

KEYWORDS: Nanoparticles, Plasmons, Particles, Surface plasmons, Metals, Nanostructures, Gold, Molecules, Silver, Corrosion

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Proceedings Article | 13 September 2013 Paper

Matrix induced in-situ growth of crystalline Au nanoparticles for photonic applications

C. Katzer, M. Westerhausen, P. Naujok, H. Bernhardt, G. Schmidl, W. Fritzsche, A. Undisz, M. Drüe, M. Rettenmayr, F. Schmidl

Proceedings Volume 8807, 88070K (2013) https://doi.org/10.1117/12.2024058

KEYWORDS: Particles, Gold, Nanoparticles, Thin films, Crystals, Dewetting, Photonic crystals, Etching, Integrating spheres, Scanning electron microscopy

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Proceedings Article | 22 February 2013 Paper

Bioanalytics using single plasmonic nanostructures

O. Stranik, T. Schneider, N. Jahr, J. Wirth, F. Garwe, A. Csaki, W. Fritzsche

Proceedings Volume 8595, 85950C (2013) https://doi.org/10.1117/12.2008222

KEYWORDS: Neptunium, Nanoparticles, Metals, Gold, Molecules, Nanostructures, Particles, Plasmonics, Electromagnetism, Silver

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Proceedings Article | 7 November 2012 Paper

Multiplexed localized surface plasmon resonance sensing with suspended core fibers

Kerstin Schröder, Marko Zobel, Andrea Csáki, Anka Schwuchow, Wolfgang Fritzsche, Reinhardt Willsch, Hartmut Bartelt

Proceedings Volume 8421, 84217L (2012) https://doi.org/10.1117/12.965875

KEYWORDS: Nanoparticles, Multiplexing, Refractive index, Sensors, Gold, Silver, Optical fibers, Optical spheres, Surface plasmons, Molecules

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Proceedings Article | 1 May 2012 Paper

Imaging of waveguiding and scattering interferences in individual GaAs nanowires via second-harmonic generation

Rachel Grange, Gerald Brönstrup, Anton Sergeyev, Jessica Richter, Thomas Pertsch, Andreas Tünnermann, Silke Christiansen, Christian Leiterer, Wolfgang Fritzsche, Christoph Gutsche, Andrey Lysov, Werner Prost, Franz-Josef Tegude

Proceedings Volume 8424, 84241J (2012) https://doi.org/10.1117/12.921758

KEYWORDS: Second-harmonic generation, Gallium arsenide, Gold, Mie scattering, Near infrared, Scattering, Visible radiation, Waveguides, Scanning electron microscopy, Nanowires

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Proceedings Article | 29 November 2011 Paper

Plasmonic nanoparticles for bioanalytics and therapy at the limit

T. Schneider, J. Wirth, F. Garwe, A. Csáki, W. Fritzsche

Proceedings Volume 8311, 83110F (2011) https://doi.org/10.1117/12.901242

KEYWORDS: Nanoparticles, Molecules, Plasmonics, Sensors, Particles, Gold, Metals, Plasmons, Spectroscopy, Nanoantennas

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Proceedings Article | 13 September 2011 Paper

Noble metal nanoparticles for LSPR-based optical sensing

T. Schneider, O. Stranik, A. Csáki, W. Fritzsche

Proceedings Volume 8099, 80990Y (2011) https://doi.org/10.1117/12.893518

KEYWORDS: Nanoparticles, Particles, Spectroscopy, Metals, Molecules, Scattering, Gold, Nanosensors, Glasses, Sensors

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Proceedings Article | 10 May 2011 Paper

Homogenous metallic nanoparticle monolayer inside a microstructured optical fiber

Kerstin Schröder, Andrea Csáki, Anka Schwuchow, Ines Latka, Katharina Strehlau, Thomas Henkel, Daniell Malsch, Kay Schuster, Karina Weber, Robert Möller, Wolfgang Fritzsche, Hartmut Bartelt

Proceedings Volume 8073, 80732J (2011) https://doi.org/10.1117/12.886846

KEYWORDS: Micro optical fluidics, Gold, Nanoparticles, Structured optical fibers, Silver, Sensors, Raman spectroscopy, Optical spheres, Particles, Refractive index

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Proceedings Article | 7 May 2011 Paper

Plasmonic nanoparticles for optical biosensing

A. Csáki, K. Schröder, R. Willsch, H. Bartelt, W. Fritzsche

Proceedings Volume 8073, 80730I (2011) https://doi.org/10.1117/12.886798

KEYWORDS: Nanoparticles, Particles, Optical fibers, Plasmonics, Plasmons, Gold, Sensors, Refractive index, Metals, Transducers

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Proceedings Article | 3 May 2011 Paper

Ultrasensitive nanosensors based on electronic effects in nanoscale structures

Christian Leiterer, Steffen Berg, Thomas Schneider, Norbert Jahr, Ondrej Stranik, Gerald Broenstrup, Silke Christiansen, Andrea Csaki, Wolfgang Fritzsche

Proceedings Volume 8068, 806802 (2011) https://doi.org/10.1117/12.886577

KEYWORDS: Molecules, Sensors, Metals, Nanoparticles, Nanosensors, Plasmonics, Surface plasmons, Particles, Nanostructures, Nanowires

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Proceedings Article | 3 May 2011 Paper

Micronano integration of nanoscale objects for parallel biosensorics

Christian Leiterer, Steffen Berg, Norbert Jahr, Gerald Brönstrup, Silke Christiansen, Andrea Csaki, Wolfgang Fritzsche

Proceedings Volume 8068, 80680W (2011) https://doi.org/10.1117/12.886576

KEYWORDS: Dielectrophoresis, Electrodes, Sensors, Molecules, Bridges, Nanoparticles, Metals, Particles, Molecular bridges, Nanowires

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Proceedings Article | 28 April 2010 Paper

Easy characterization of SERS substrates of enzymatically produced silver nanoparticles and their applications in the area of bioanalytics

K. Strelau, T. Schüler, R. Möller, W. Fritzsche, J. Popp

Proceedings Volume 7715, 771539 (2010) https://doi.org/10.1117/12.854236

KEYWORDS: Surface enhanced Raman spectroscopy, Silver, Nanoparticles, Molecules, Raman spectroscopy, Particles, Electrodes, Nanostructures, Glasses, Calibration

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Proceedings Article | 28 April 2010 Paper

A microfluidic platform for chip-based DNA detection using SERS and silver colloids

K. Strelau, K. Weber, R. Möller, W. Fritzsche, J. Popp

Proceedings Volume 7715, 771514 (2010) https://doi.org/10.1117/12.854268

KEYWORDS: Microfluidics, Surface enhanced Raman spectroscopy, Raman spectroscopy, Nanoparticles, Silver, Molecules, Target detection, Molecular interactions, Microscopes, Nanostructuring

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Proceedings Article | 17 February 2010 Paper

Plasmonic nanostructures for biophotonic applications

D. Cialla, K. Strelau, T. Schüler, R. Möller, U. Hübner, H. Schneidewind, M. Zeisberger, R. Mattheis, W. Fritzsche, J. Popp

Proceedings Volume 7577, 757702 (2010) https://doi.org/10.1117/12.840596

KEYWORDS: Surface enhanced Raman spectroscopy, Nanoparticles, Gold, Silver, Raman spectroscopy, Crystals, Nanostructures, Plasmonics, Scanning electron microscopy, Molecules

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Proceedings Article | 2 September 2009 Paper

Sensoric applications based on plasmonic effects at metal nanoparticles

T. Schneider, A. Steinbrück, M. Löchner, A. Csáki, W. Fritzsche

Proceedings Volume 7395, 73951U (2009) https://doi.org/10.1117/12.825924

KEYWORDS: Nanoparticles, Particles, Metals, Proteins, Surface plasmons, Silver, Spectroscopy, Glasses, Gold, Plasmonics

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Proceedings Article | 21 August 2009 Paper

Integration of DNA molecules in microelectronic environment using dielectrophoresis

Ch. Leiterer, A. Csaki, N. Jahr, R. Kretschmer, W. Fritzsche

Proceedings Volume 7397, 73970V (2009) https://doi.org/10.1117/12.825936

KEYWORDS: Electrodes, Dielectrophoresis, Molecules, Luminescence, Lab on a chip, Microelectronics, Biological research, Molecular interactions, Optical lithography, Gold

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Proceedings Article | 29 August 2008 Paper

Integration of molecular structures in electrode gaps by dielectrophoresis

A. Csáki, St. Berg, Ch. Leiterer, R. Kretschmer, A. Wolff, W. Fritzsche

Proceedings Volume 7035, 70350I (2008) https://doi.org/10.1117/12.794768

KEYWORDS: Dielectrophoresis, Nanoparticles, Electrodes, Molecules, Metals, Particles, Luminescence, Molecular photonics, Gold, Nanowires

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Proceedings Article | 5 June 2008 Paper

Analysis of the diffuse light and optoacoustic signal generation in nanoparticles

H. Lamela, V. Cunningham, P. Pedreira, D. Gallego, P. Acedo, W. Fritzsche, A. Csaki, G. Festag, A. Steinbrük

Proceedings Volume 7022, 702207 (2008) https://doi.org/10.1117/12.803907

KEYWORDS: Nanoparticles, Gold, Absorption, Light scattering, Scattering, Signal attenuation, Signal generators, Tissue optics, Avalanche photodetectors, Medical imaging

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Proceedings Article | 23 April 2008 Paper

Nanophotonics with sub-wavelength holes and nanoparticles

Norbert Jahr, Andrea Csaki, Andrea Steinbrück, Siegmund Schröter, Wolfgang Fritzsche

Proceedings Volume 6988, 69880X (2008) https://doi.org/10.1117/12.782280

KEYWORDS: Nanoparticles, Particles, Atomic force microscopy, Scanning electron microscopy, Spectroscopy, Metals, Chromium, Nanophotonics, Near field scanning optical microscopy, Near field optics

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Proceedings Article | 4 March 2008 Paper

Comparative analysis of optical absorption and optoacoustic signal generation in nanoparticles

H. Lamela, V. Cunningham, P. Pedreira, D. Gallego, P. Acedo, W. Fritzsche, A. Csaki, G. Festag, A. Steinbrük

Proceedings Volume 6856, 68560L (2008) https://doi.org/10.1117/12.772305

KEYWORDS: Absorption, Nanoparticles, Transmittance, Gold, Signal generators, Spherical lenses, Tissue optics, Signal attenuation, Medical imaging, Scattering

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Proceedings Article | 14 February 2008 Paper

Optical properties of core-shell gold-silver and silver-gold nanoparticles for some laser wavelengths

Victor Pustovalov, Karsten König, Liudmila Astafyeva, Wolfgang Fritzsche

Proceedings Volume 6879, 687915 (2008) https://doi.org/10.1117/12.761551

KEYWORDS: Nanoparticles, Optical properties, Absorption, Metals, Particles, Silver, Gold, Scattering, Spherical lenses, Plasmons

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Proceedings Article | 27 December 2007 Paper

DNA-conjugated metal nanoparticle for bioanalytics, nanophotonics, and nanoelectronics

Wolfgang Fritzsche, Andrea Csaki, Robert Möller, Andrea Steinbrück, Grit Festag, Andreas Wolff, Thomas Schüler

Proceedings Volume 6799, 679906 (2007) https://doi.org/10.1117/12.758621

KEYWORDS: Nanoparticles, Metals, Particles, Gold, Molecules, Nanoelectronics, Electrodes, Silver, Signal detection, Nanowires

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Proceedings Article | 13 July 2007 Paper

Characterization of silver nanoparticles deposited by an enzyme

Thomas Schüler, Robert Möller, Andrea Steinbrück, Wolfgang Fritzsche, Jürgen Popp

Proceedings Volume 6633, 66331V (2007) https://doi.org/10.1117/12.728138

KEYWORDS: Particles, Silver, Nanoparticles, Gold, Metals, Electrodes, Scanning electron microscopy, Light scattering, Atomic force microscopy, Signal detection

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Proceedings Article | 13 July 2007 Paper

Protein chip analysis by probing time-resolved UV fluorescence

Paulius Grigaravicius, Rüdiger Dietrich, Wolfgang Fritzsche, Karl Otto Greulich, Uwe Horn, Dietmar Knoll, Sven Peters, Hans-Martin Striebel, Peter Schellenberg

Proceedings Volume 6633, 66332E (2007) https://doi.org/10.1117/12.728451

KEYWORDS: Proteins, Luminescence, Ultraviolet radiation, Molecules, Pulsed laser operation, Single photon, Glasses, Picosecond phenomena, Biological research, Cancer

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Proceedings Article | 13 July 2007 Paper

Preparation and optical characterization of core-shell bi-metallic nanoparticles

Andrea Steinbrück, Andrea Csáki, Grit Festag, Thomas Schüler, Wolfgang Fritzsche

Proceedings Volume 6633, 66332I (2007) https://doi.org/10.1117/12.728625

KEYWORDS: Nanoparticles, Silver, Gold, Particles, Metals, Transmission electron microscopy, Absorption, Scanning electron microscopy, Optical properties, Atomic force microscopy

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Proceedings Article | 20 April 2006 Paper

Fabrication and characterization of nanoparticle-based plasmonic nanostructures

Andrea Csáki, Andrea Steinbrück, Siegmund Schröter, Wolfgang Fritzsche

Proceedings Volume 6195, 61950X (2006) https://doi.org/10.1117/12.662756

KEYWORDS: Particles, Nanoparticles, Metals, Atomic force microscopy, Plasmonics, Chromium, Nanostructures, Image transmission, Silver, Optical properties

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Proceedings Article | 20 April 2006 Paper

Designing plasmonic structures: bi-metalic core-shell nanoparticles

Andrea Steinbrück, Andrea Csáki, Grit Festag, Wolfgang Fritzsche

Proceedings Volume 6195, 619513 (2006) https://doi.org/10.1117/12.662778

KEYWORDS: Particles, Nanoparticles, Gold, Silver, Metals, Atomic force microscopy, Transmission electron microscopy, Optical properties, Plasmons, Spectroscopy

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Proceedings Article | 14 April 2006 Paper

Localization of laser energy conversion by metal nanoparticles: basic effects and applications

Andrea Csáki, Frank Garwe, Andrea Steinbrück, Anja Weise, Karsten König, Wolfgang Fritzsche

Proceedings Volume 6191, 61911K (2006) https://doi.org/10.1117/12.662730

KEYWORDS: Nanoparticles, Particles, Atomic force microscopy, Metals, Gold, Laser therapeutics, Luminescence, Plasmons, Molecules, Laser energy

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Proceedings Article | 29 March 2005 Paper

A novel DNA restriction technology based on laser pulse energy conversion on sequence-specific bound metal nanoparticles

Andrea Csaki, Gunter Maubach, Frank Garwe, Andrea Steinbrueck, Karsten Koenig, Wolfgang Fritzsche

Proceedings Volume 5699, (2005) https://doi.org/10.1117/12.590450

KEYWORDS: Nanoparticles, Particles, Molecules, Metals, Gold, Laser applications, Atomic force microscopy, Polymers, Laser irradiation, Pulsed laser operation

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Proceedings Article | 29 March 2005 Paper

Metal nanoparticles as passive and active tools for bioanalytics

Wolfgang Fritzsche, Andrea Csaki, Andrea Steinbrueck, Frank Garwe, Karsten Koenig, Markus Raschke

Proceedings Volume 5699, (2005) https://doi.org/10.1117/12.590501

KEYWORDS: Nanoparticles, Metals, Particles, Molecules, Nanotechnology, Molecular lasers, Molecular nanotechnology, Signal detection, Surface plasmons, Nano antennas

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Proceedings Article | 10 September 2004 Paper

Nanoprocessing of DNA with femtosecond laser

Karsten Koenig, Frank Garwe, Andrea Czaki, Gunther Maubach, Iris Riemann, Wolfgang Fritzsche

Proceedings Volume 5462, (2004) https://doi.org/10.1117/12.545730

KEYWORDS: Molecules, Nanoparticles, Femtosecond phenomena, Gold, Molecular lasers, Laser cutting, Particles, Silver, Atomic force microscopy, Near infrared

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Proceedings Article | 21 June 2002 Paper

Nanoparticle-based optical detection of molecular interactions of DNA-chip technology

Wolfgang Fritzsche, Andrea Csaki, Robert Moeller

Proceedings Volume 4626, (2002) https://doi.org/10.1117/12.472097

KEYWORDS: Silver, Nanoparticles, Scanners, Gold, Molecular interactions, Particles, Molecules, Optical microscopes, Microscopes, Reflection

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Proceedings Article | 1 April 2002 Paper

Nanodissection of human chromosomes and ultraprecise eye surgery with nanojoule near-infrared femtosecond laser pulses

Karsten Koenig, Iris Riemann, Oliver Krauss, Wolfgang Fritzsche

Proceedings Volume 4633, (2002) https://doi.org/10.1117/12.461380

KEYWORDS: Femtosecond phenomena, Surgery, Nanoprocess, Tissues, Laser therapeutics, Brain, Tissue optics, Laser vision correction, Laser processing, Absorption

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Nanojoule and sub-nanojoule 80 MHz femtosecond laser pulses at 750-850 nm of a compact titanium:sapphire laser have been used for highly precise nanoprocessing of DNA as well as of intracellular and intratissue compartments. In particular, a mean power between 15 mW and 100 mW, 170 fs pulse width, submicron distance of illumination spots and microsecond beam dwell times on spots have been used for multiphoton- mediated nanoprocessing of human chromosomes, brain and ocular intrastromal tissue. By focusing the laser beam with high numerical aperture focusing optics of the laser scan system femt-O-cut and of modified multiphoton scanning microscopes to diffraction-limited spots and TW/cm² light intensities, precise submicron holes and cuts have been processed by single spot exposure and line scans. A minimum FWHM cut size below 70 nm during the partial dissection of the human chromosome 3 was achieved. Complete chromosome dissection could be performed with FWHM cut sizes below 200 nm. Intracellular chromosome dissection was possible. Intratissue processing in depths of 50 - 100micrometers and deeper with a precision of about 1micrometers including cuts through a nuclei of a single intratissue cell without destructive photo-disruption effects to surrounding tissue layers have been demonstrated in brain and eye tissues. The femt-O-cut system includes a diagnostic system for optical tomography with submicron resolution based on multiphoton- excited autofluorescence imaging (MAI) and second harmonic generation. This system was used to localize the intracellular and intratissue targets and to control the effects of nanoprocessing. These studies show, that in contrast to conventional approaches of material processing with amplified femtosecond laser systems and (mu) J pulse energies, nanoprocessing of materials including biotissues can be performed with nJ and sub-nJ high repetition femtosecond laser pulses of turn-key compact lasers without collateral damage. Potential applications include highly precise cell and embryo surgery, gene diagnostics and gene therapy, intrastromal refractive surgery, cancer therapy and brain surgery.

Showing 5 of 35 publications

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