TY - JOUR AB - e study the discrete soliton formation in one- and two- dimensional arrays of nanowires coated with graphene monolayers. Highly confined solitons, including the fundamental and the higher-order modes, are found to be supported by the proposed structure with a low level of power flow. Numerical analysis reveals that, by tuning the input intensity and Fermi energy, the beam diffraction, soliton dimension and propagation loss can be fully controlled in a broad range, indicating potential values of the graphene-based solitons in nonlinear/active nanophotonic systems. AU - Kou, Yao AU - Förstner, Jens ID - 3884 IS - 5 JF - Optics Express KW - tet_topic_plasmonics KW - tet_topic_polariton SN - 1094-4087 TI - Discrete plasmonic solitons in graphene-coated nanowire arrays VL - 24 ER - TY - JOUR AB - We study the formation of subwavelength solitons in binary metal-dielectric lattices. We show that the transverse modulation of the lattice constant breaks the fundamental plasmonic band and suppresses the discrete diffraction of surface plasmon waves. New types of plasmonic solitons are found, and their characteristics are analyzed. We also demonstrate the existence of photonic-plasmonic vector solitons and elucidate their propagation properties. AU - Kou, Yao AU - Förstner, Jens ID - 3896 IS - 6 JF - Optics Letters KW - tet_topic_polariton SN - 0146-9592 TI - Subwavelength binary plasmonic solitons VL - 40 ER - TY - JOUR AB - We present phase-resolved pulse propagation measurements that allow us to fully describe the transition between several light–matter interaction regimes. The complete range from linear excitation to the breakdown of the photonic bandgap on to self-induced transmission and self-phase modulation is studied on a high-quality multiple-quantum-well Bragg structure. An improved fast-scanning cross-correlation frequency-resolved optical gating setup is applied to retrieve the pulse phase with an excellent signal-tonoise ratio. Calculations using the semiconductor Maxwell–Bloch equations show qualitative agreement with the experimental findings. AU - zu Siederdissen, Tilman Höner AU - Nielsen, Nils C. AU - Kuhl, Jürgen AU - Schaarschmidt, Martin AU - Förstner, Jens AU - Knorr, Andreas AU - Khitrova, Galina AU - Gibbs, Hyatt M. AU - Koch, Stephan W. AU - Giessen, Harald ID - 4256 IS - 11 JF - Optics Letters KW - tet_topic_polariton KW - tet_topic_qw SN - 0146-9592 TI - Transition between different coherent light–matter interaction regimes analyzed by phase-resolved pulse propagation VL - 30 ER - TY - JOUR AB - The interaction of strong low-area pulses with two-level systems shows absorption line narrowing and hole burning within the homogeneous linewidth as a result of nonlinear wave mixing. The wave mixing results from the two-level electronic saturation nonlinearity and occurs, depending on the sign of the pulse area, as a strong absorption enhancement or gain at the transition frequency of the two-level system for resonant excitation. AU - Förstner, Jens AU - Knorr, A. AU - Lindberg, M. AU - Koch, S. W. ID - 4303 IS - 20 JF - Optics Letters KW - tet_topic_polariton SN - 0146-9592 TI - Line narrowing and hole burning within the homogeneous linewidth: a new wave-mixing effect in two-level systems VL - 27 ER - TY - CHAP AB - We investigate the spatiotemporal characteristics of subpicosecond pulse propagation in the nonlinear defocusing regime below the band edge of bulk GaAs. We observe temporal and spatial pulse compression and instabilities. AU - Nielsen, N. C. AU - zu Höner Siederdissen, T. AU - Kuhl, J. AU - Schaarschmidt, M. AU - Förstner, Jens AU - Knorr, A. AU - Koch, S. W. AU - Giessen, H. ID - 4269 KW - tet_topic_polariton SN - 0172-6218 T2 - Springer Series in Chemical Physics TI - Temporal and Spatial Pulse Compression in a Nonlinear Defocusing Material ER - TY - CONF AB - We demonstrate temporal and spatial pulse compression and modulational instabilities in the nonlinear defocusing regime near the band edge of bulk GaAs. Experiment and theory show that spatiotemporal coupling is responsible for these surprising phenomena. AU - Nielsen, Nils. C. AU - Siederdissen, Tilmann H. zu AU - Kuhl, Jürgen AU - Schaarschmidt, Martin AU - Förstner, Jens AU - Knorr, Andreas AU - Koch, Stephan W. AU - Giessen, Harald ID - 4279 KW - tet_topic_polariton SN - 3-54024-110-8 T2 - International Conference on Ultrafast Phenomena 2004 TI - Subpicosecond spatiotemporal pulse compression in a nonlinear defocusing material ER - TY - CONF AB - The coupled spatiotemporal characteristics of subpicosecond pulses propagating in the nonlinear defocusing regime near the band edge of bulk GaAs are investigated experimentally and theoretically. We demonstrate pulse compression both in time and transverse space. AU - Nielsen, Nils C. AU - Kuhl, Jürgen AU - Schaarschmidt, Martin AU - Förstner, Jens AU - Knorr, Andreas AU - Koch, Stephan W. AU - Giessen, Harald ID - 4281 KW - tet_topic_polariton SN - 1-55752-770-9 T2 - Conference on Lasers and Electro-Optics/International Quantum Electronics Conference and Photonic Applications Systems Technologies TI - Temporal and spatial compression of near-resonant pulses in a nonlinear defocusing semiconductor ER - TY - JOUR AB - The occurrence of non-Lorentzian lineshapes is analyzed for a variety of nanooptical semiconductor systems such as quantum wells and quantum dots. Their origin is traced back to light–matter interaction (light propagation) and many-particle correlations (electron–electron and electron– phonon interaction). AU - Förstner, Jens AU - Ahn, K.J. AU - Danckwerts, J. AU - Schaarschmidt, M. AU - Waldmüller, I. AU - Weber, C. AU - Knorr, A. ID - 4300 IS - 1 JF - physica status solidi (b) KW - tet_topic_polariton SN - 0370-1972 TI - Light Propagation- and Many-particle-induced Non-Lorentzian Lineshapes in Semiconductor Nanooptics VL - 234 ER - TY - JOUR AB - The coherent exciton-light coupling in pulse propagation experiments on the A-exciton resonance in bulk CdSe is investigated over a broad intensity range. At low light intensities, polariton propagation beats due to interference between excited states on both polariton branches are observed. In an intermediate intensity regime, the temporal polariton beating is suppressed in consequence of exciton-exciton interaction. At the highest light intensities, self-induced transmission and multiple pulse breakup are identified as a signature for carrier density Rabi flopping. Exciton-phonon scattering is shown to gradually eliminate coherent nonlinear propagation effects due to enhanced dephasing of the excitonic polarization. Calculations using the semiconductor Maxwell-Bloch equations are in qualitative agreement with the experimental data. AU - Nielsen, N. C. AU - Linden, S. AU - Kuhl, J. AU - Förstner, Jens AU - Knorr, A. AU - Koch, S. W. AU - Giessen, H. ID - 4306 IS - 24 JF - Physical Review B KW - tet_topic_polariton SN - 0163-1829 TI - Coherent nonlinear pulse propagation on a free-exciton resonance in a semiconductor VL - 64 ER - TY - JOUR AB - Features reminiscent of spectral hole burning in a homogeneous line are predicted to result from the interaction of small area pulses with the semiconductor exciton resonance. The small area pulses may be designed through pulse shaping or evolve naturally in bulk semiconductors via polaritonic effects. The spectral features exhibit signatures that are characteristic for the underlying material nonlinearity and should occur in any system with isolated spectral resonances and coherent nonlinearities. AU - Förstner, Jens AU - Knorr, A. AU - Koch, S. W. ID - 4308 IS - 3 JF - Physical Review Letters KW - tet_topic_polariton SN - 0031-9007 TI - Nonlinear Pulse Propagation in Semiconductors: Hole Burning within a Homogeneous Line VL - 86 ER - TY - JOUR AB - Nonlinear propagation of optical pulses through an extended bulk semiconductor is investigated using the coupled semiconductor Maxwell‐Bloch equations including excitation induced correlations. For short pulse excitation around the exciton resonance, the theory describes the development of polariton beats and their suppression at increasing input pulse intensities due to the coupling of single exciton states to the Coulomb‐correlated continuum of two‐exciton states. A comparison of the theoretical results with experimental observations for CdSe bulk material is presented. AU - Förstner, Jens AU - Knorr, A. AU - Kuckenburg, S. AU - Meier, T. AU - Koch, S.W. AU - Giessen, H. AU - Linden, S. AU - Kuhl, J. ID - 4310 IS - 1 JF - physica status solidi (b) KW - tet_topic_polariton SN - 0370-1972 TI - Nonlinear Polariton Pulse Propagation in Bulk Semiconductors VL - 221 ER -