Self-phase modulation of a single-cycle THz pulse

Autor: Turchinovich, Dmitry, Hvam, Jørn Märcher, Hoffmann, M. C.

Publikováno v: Turchinovich, D, Hvam, J M & Hoffmann, M C 2013, Self-phase modulation of a single-cycle THz pulse . in XVIIIth International Conference on Ultrafast Phenomena : THz Science and Technology, Nano-Optics, Plasmonics and Meta Materials . EDP Sciences, E P J Web of Conferences, vol. 41, pp. 09003, 18th International Conference on Ultrafast Phenomena (UP 2012), Lausanne, Switzerland, 08/07/2012 . https://doi.org/10.1051/epjconf/20134109003

We demonstrate self-phase modulation (SPM) of a single-cycle THz pulse in a semiconductor, using bulk n-GaAs as a model system. The SPM arises from the heating of free electrons in the electric field of the THz pulse. Electron heating leads to an ult

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https://orbit.dtu.dk/en/publications/d0cd041e-84c5-4323-b1d3-77aa7b22223f

Polariton condensation in a disordered potential

Autor: Antón, C., Tosi, G., Lingg, C. A., Cuadra, J., Spano, R., Marchetti, F. M., Szymanska, M. H., Martín, M. D., Poel, Mike van der, Hvam, Jørn Märcher, Lemaître, A., Bloch, J., Tejedor, C., Viña, L.

Publikováno v: Antón, C, Tosi, G, Lingg, C A, Cuadra, J, Spano, R, Marchetti, F M, Szymanska, M H, Martín, M D, Poel, M V D, Hvam, J M, Lemaître, A, Bloch, J, Tejedor, C & Viña, L 2011, Polariton condensation in a disordered potential . in Conference Booklet . pp. MoP41, 12th International Conference on Optics of Excitons in Confined Systems, Paris, France, 12/09/2011 . < http://www.oecs12.org/OECS12/Home.html >

We study polariton condensation under OPO (Optical Parametric Oscillator) out-of-equilibrium conditions [1] in the presence of linear and point defects. Because of the simultaneous presence of pump, signal and idler emitting at different wave vectors

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https://orbit.dtu.dk/en/publications/e99183dc-7940-4a24-86fd-c8bde3c8f26c

Optical waveform sampling and error-free demultiplexing of 1.28 Tbit/s serial data in a silicon nanowire:[post deadline]

Autor: Ji, Hua, Hu, Hao, Galili, Michael, Oxenløwe, Leif Katsuo, Pu, Minhao, Yvind, Kresten, Hvam, Jørn Märcher, Jeppesen, Palle

Publikováno v: Ji, H, Hu, H, Galili, M, Oxenløwe, L K, Pu, M, Yvind, K, Hvam, J M & Jeppesen, P 2010, Optical waveform sampling and error-free demultiplexing of 1.28 Tbit/s serial data in a silicon nanowire : [post deadline] . in 2010 Conference on (OFC/NFOEC) Optical Fiber Communication (OFC), collocated National Fiber Optic Engineers Conference . IEEE, pp. 1-3, 2010 Optical Fiber Communication Conference and Exposition and the National Fiber Optic Engineers Conference, San Diego, CA, United States, 21/03/2010 .

We experimentally demonstrate 640 Gbit/s and 1.28 Tbit/s serial data optical waveform sampling and 640-to-10 Gbit/s and 1.28 Tbit/s-to-10 Gbit/s error-free demultiplexing using four-wave mixing in a 300nm$$450nm$$5mm silicon nanowire.

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https://orbit.dtu.dk/en/publications/834afbf0-6997-4fbc-8761-ed3d5239b54f

Novel design of low-jitter 10 GHz all-active monolithic mode-locked lasers

Autor: Larsson, David, Yvind, Kresten, Christiansen, Lotte Jin, Mørk, Jesper, Hvam, Jørn Märcher, Hanberg, Jesper

Publikováno v: Larsson, D, Yvind, K, Christiansen, L J, Mørk, J, Hvam, J M & Hanberg, J 2004, Novel design of low-jitter 10 GHz all-active monolithic mode-locked lasers . in 2004 CLEO/IQEC Technical Digest CD-Rom . IEEE, Conference on Lasers and Electro-Optics 2004, San Francisco, CA, United States, 18/05/2004 . https://doi.org/10.1109/CLEO.2004.1360941

Using a novel design, we have fabricated 10 GHz all-active monolithic mode-locked semiconductor lasers that generate 1.4 ps pulses with record-low timing jitter. The dynamical properties of lasers with 1 and 2 QWs are compared.

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Dynamics of unidirectional phonon-assisted transport of photoexcited carriers in step-graded In-x(Al0.17Ga0.83)(1-x)As/Al0.17Ga0.83As multiple quantum wells

Autor: Machida, S., Matsuo, M., Fujiwara, K., Folkenberg, J.R., Hvam, Jørn Märcher

Publikováno v: Machida, S, Matsuo, M, Fujiwara, K, Folkenberg, J R & Hvam, J M 2003, ' Dynamics of unidirectional phonon-assisted transport of photoexcited carriers in step-graded In-x(Al0.17Ga0.83)(1-x)As/Al0.17Ga0.83As multiple quantum wells ', Physical Review B Condensed Matter, vol. 67, no. 20, pp. 205322 . https://doi.org/10.1103/PhysRevB.67.205322

The dynamics of perpendicular transport of photoexcited carriers assisted by phonon scattering is investigated in a novel step-graded In-x(Al0.17Ga0.83)(1-x)As quantum-well heterostructure by measuring the temperature dependence of spectrally and tem

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