@article{64474, author = {{Höpfner, Henning and Ludwig, Arne and Ludwig, Astrid and Reuter, Dirk and Wieck, Andreas and Gerhardt, Nils Christopher and Hofmann, Martin and Fritsche, Carola and Stromberg, Frank and Wende, Heiko and Keune, Werner}}, journal = {{Applied physics letters}}, number = {{11}}, pages = {{112402--1--112402--4}}, title = {{{Magnetic field dependence of the spin relaxation length in spin light-emitting diodes}}}, doi = {{10.1063/1.4752162}}, volume = {{101}}, year = {{2012}}, } @article{64471, author = {{Koukourakis, Nektarios and Jaedicke, Volker and Ad­in­da-Oug­ba, Adamou and Gerhardt, Nils Christopher and Hofmann, Martin and Goebel, Sebastian and Wiethoff, Helge and Höpfner, Henning}}, journal = {{Optics express}}, number = {{20}}, pages = {{22636 -- 22648}}, title = {{{Depth-filtered digital holography}}}, doi = {{10.1364/oe.20.022636}}, volume = {{20}}, year = {{2012}}, } @inproceedings{64478, author = {{Jaedicke, Volker and Agcaer, Semih and Kasseck, Christoph Tobias and Gerhardt, Nils Christopher and Hofmann, Martin and Goebel, Sebastian and Welp, Hubert}}, booktitle = {{Proceedings of the 7th International Workshop on Biosignal Interpretation (BSI2012)}}, pages = {{224 -- 227}}, title = {{{Signal processing for spectroscopic optical coherence tomography}}}, year = {{2012}}, } @article{64475, author = {{Beckmann, Martin and Friedrich, Claus-Stefan and Mienkina, Martin and Gerhardt, Nils Christopher and Hofmann, Martin and Schmitz, Georg}}, journal = {{Photons plus ultrasound}}, pages = {{82231E--1--82231E--8}}, title = {{{Multispectral photoacoustic coded excitation using pseudorandom codes - 82231E}}}, doi = {{10.1117/12.907427}}, year = {{2012}}, } @inproceedings{64497, author = {{Gerhardt, Nils Christopher and Koukourakis, Nektarios and Funke, Dominic and Hofmann, Martin R. and Klimasch, Max and Kunert, Bernardette and Liebich, Sven and Trusheim, Daniel and Zimprich, Martin and Volz, Kerstin and Stolz, Wolfgang}}, booktitle = {{2011 13th International Conference on Transparent Optical Networks (ICTON 2011)}}, pages = {{111 -- 114}}, title = {{{Time-resolved photoluminescence and optical gain of Ga(NAsP) heterostructures pseudomorphically grown on silicon (001) substrate}}}, doi = {{10.1109/icton.2011.5970794}}, volume = {{1}}, year = {{2011}}, } @inproceedings{64494, author = {{Beckmann, Martin and Mienkina, Martin and Friedrich, Claus-Stefan and Gerhardt, Nils Christopher and Hofmann, Martin and Schmitz, Georg}}, booktitle = {{2011 IEEE International Ultrasonics Symposium (IUS 2011)}}, pages = {{1179 -- 1182}}, title = {{{Photoacoustic coded excitation using periodically perfect sequences}}}, doi = {{10.1109/ultsym.2011.0290}}, volume = {{2}}, year = {{2011}}, } @inproceedings{64486, author = {{Gerhardt, Nils Christopher and Hofmann, Martin R. and Koukourakis, Nektarios and Funke, Dominic A. and Kunert, B. and Liebich, S. and Trusheim, D. and Zimprich, M. and Bückers, C. and Koch, S. W. and Volz, K. and Stolz, W.}}, title = {{{Modal gain and time-resolved photoluminescence of Ga(NAsP) heterostructures pseudomorphically grown on Silicon (001) substrate}}}, year = {{2011}}, } @inproceedings{64487, author = {{Gerhardt, Nils Christopher and Hofmann, Martin R. and Koukourakis, Nektarios and Funke, Dominic A. and Kunert, B. and Liebich, S. and Trusheim, D. and Zimprich, M. and Bückers, C. and Koch, S. W. and Volz, K. and Stolz, W.}}, title = {{{Modal gain and time-resolved photoluminescence of Ga(NAsP) heterostructures pseudomorphically grown on silicon (001) substrate}}}, year = {{2011}}, } @inproceedings{64496, author = {{Friedrich, Claus-Stefan and Mienkina, Martin and Gerhardt, Nils Christopher and Beckmann, Martin and Schmitz, Georg and Hofmann, Martin R. and Brenner, Carsten and Jörger, Manfred and Strauß, Andreas}}, booktitle = {{Diffuse optical imaging III}}, pages = {{1 -- 9}}, title = {{{Quantitative photoacoustic blood oxygenation measurement of whole porcine blood samples using a multi-wavelength semiconductor laser system}}}, doi = {{10.1117/12.889682}}, year = {{2011}}, } @article{64495, author = {{Koukourakis, Nektarios and Li, Mingyuan and Lai, Ryan Yiu Wai and Brenner, Carsten and Gerhardt, Nils Christopher and Hofmann, Martin and Abdelwahab, Tarek and Höpfner, Henning and Darakis, Emmanouil}}, journal = {{Optics express}}, number = {{22}}, pages = {{22004 -- 22023}}, title = {{{Photorefractive two-wave mixing for image amplification in digital holography}}}, doi = {{10.1364/oe.19.022004}}, volume = {{19}}, year = {{2011}}, } @inproceedings{64493, author = {{Mienkina, Martin and Friedrich, Claus-Stefan and Gerhardt, Nils Christopher and Hofmann, Martin and Schmitz, Georg and Eder, Alexander}}, booktitle = {{442. Wilhelm und Else Heraeus-Seminar "Molecular Imaging" in Bad Honnef, October 5th - 8th, 2009}}, title = {{{Ex­pe­ri­men­tal eva­lua­ti­on of mul­tis­pec­tral pho­toa­coustic coded ex­ci­ta­ti­on using or­tho­go­nal uni­po­lar golay codes}}}, year = {{2011}}, } @inproceedings{64488, author = {{Gerhardt, Nils Christopher and Hofmann, Martin R. and Koukourakis, Nektarios and Funke, Dominic A. and Kunert, B. and Liebich, S. and Trusheim, D. and Zimprich, M. and Bückers, C. and Koch, S. W. and Volz, K. and Stolz, W.}}, title = {{{Modal gain and time-resolved photoluminescence of Ga(NAsP) heterostructures pseudomorphically grown on silicon (001) substrate}}}, year = {{2011}}, } @inproceedings{64489, author = {{Brenner, Carsten and Gerhardt, Nils Christopher and Hofmann, Martin R. and Schmitz, Georg and Friedrich, Claus-Stefan and Mienkina, Martin P. and Beckmann, Martin F. and Jörger, Manfred and Strauß, Andreas}}, title = {{{Quantitative photoacoustic blood oxygenation measurement of whole porcine blood samples using a multi-wavelength semiconductor laser system}}}, year = {{2011}}, } @inproceedings{64491, author = {{Gerhardt, Nils Christopher and Hofmann, Martin R. and Koukourakis, Nektarios and Funke, Dominic A. and Kunert, B. and Liebich, S. and Trusheim, D. and Zimprich, M. and Buckers, C. and Koch, S. W. and Volz, K. and Stolz, W.}}, title = {{{Modal gain and time-resolved photoluminescence of Ga(NAsP) heterostructures pseudomorphically grown on silicon (001) substrate}}}, year = {{2011}}, } @inproceedings{64490, author = {{Gerhardt, Nils Christopher and Hofmann, Martin R. and Jaedicke, Volker and Kasseck, Christoph and Wiethoff, Helge and Agcaer, Semih and Welp, Hubert}}, title = {{{Spectroscopic optical coherence tomography for substance identification}}}, year = {{2011}}, } @article{59692, abstract = {{We report spin-induced polarization oscillations in vertical-cavity surface-emitting lasers above threshold and at room temperature. The oscillation frequency is 11.6 GHz, which is significantly higher than the modulation bandwidth of less than 4 GHz in the device. The oscillation frequency is determined by an additional resonance frequency in birefringence containing microcavities, which is potentially much higher than the conventional relaxation oscillation frequency. The damping of the oscillations can be controlled by the current, allowing for oscillation lifetimes much longer than the spin lifetime in the device as well as for short bursts potentially interesting for information transmission.}}, author = {{Gerhardt, N. C. and Li, M. Y. and Jähme, H. and Höpfner, H. and Ackemann, T. and Hofmann, M. R.}}, issn = {{0003-6951}}, journal = {{Applied Physics Letters}}, number = {{15}}, publisher = {{AIP Publishing}}, title = {{{Ultrafast spin-induced polarization oscillations with tunable lifetime in vertical-cavity surface-emitting lasers}}}, doi = {{10.1063/1.3651339}}, volume = {{99}}, year = {{2011}}, } @article{64492, author = {{Li, Mingyuan and Jähme, Hendrik and Soldat, Henning and Gerhardt, Nils Christopher and Hofmann, Martin and Ackemann, Thorsten}}, journal = {{2011 Conference on Lasers and Electro-Optics Europe and 12th European Quantum Electronics Conference (CLEO Europe/EQEC 2011)}}, pages = {{109}}, title = {{{Birefringence and spin controlled ultrafast polarization oscillations in vertical-cavity surface-emitting lasers}}}, doi = {{10.1109/cleoe.2011.5942549}}, year = {{2011}}, } @article{64505, author = {{Mienkina, Martin and Friedrich, Claus-Stefan and Gerhardt, Nils Christopher and Schiffner, Martin F. and Hofmann, Martin and Schmitz, Georg and Beckmann, Martin F.}}, journal = {{Optics express}}, number = {{9}}, pages = {{9076 -- 9087}}, title = {{{Multispectral photoacoustic coded excitation imaging using unipolar orthogonal Golay codes}}}, doi = {{10.1364/oe.18.009076}}, volume = {{18}}, year = {{2010}}, } @article{64502, author = {{Lai, Ryan Yiu Wai and Koukourakis, Nektarios and Gerhardt, Nils Christopher and Hamann, Sven and Ehmann, Michael and Hackl, Klaus and Ludwig, Alfred and Meyer, Robert and Hofmann, Martin R. and Darakis, Emmanouil}}, journal = {{Journal of microelectromechanical systems}}, number = {{5}}, pages = {{1175 -- 1179}}, title = {{{Integrity of micro-hotplates during high-temperature operation monitored by digital holographic microscopy}}}, doi = {{10.1109/jmems.2010.2067442}}, volume = {{19}}, year = {{2010}}, } @article{64500, author = {{Mienkina, Martin and Friedrich, Claus-Stefan and Gerhardt, Nils Christopher and Wilkening, Wilko G. and Hofmann, Martin and Schmitz, Georg}}, journal = {{IEEE transactions on ultrasonics, ferroelectrics, and frequency control}}, number = {{7}}, pages = {{1583 -- 1593}}, title = {{{Experimental evaluation of photoacoustic coded excitation using unipolar golay codes}}}, doi = {{10.1109/tuffc.2010.1588}}, volume = {{57}}, year = {{2010}}, }