Regensburg 2019 – wissenschaftliches Programm

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DY: Fachverband Dynamik und Statistische Physik

DY 50: Poster: Nonlinear Systems, Patterns, Flows ..

DY 50.12: Poster

Donnerstag, 4. April 2019, 15:00–18:00, Poster B2

Controlling soliton molecules: Driven vibrations and separation switching — •Felix Kurtz¹, Claus Ropers¹, and Georg Herink² — ¹IV. Physical Institute - Solids and Nanostructures, University of Göttingen, Germany — ²Experimental Physics VIII - Ultrafast Dynamics, University of Bayreuth, Bayreuth, Germany

Solitons, localized excitations balanced by dispersion and nonlinearity, are of particular interest in various nonlinear systems. In analogy to real molecules, they can bind together and form “soliton molecules”. Here, we study the behavior of soliton molecules in a mode-locked Ti:Sapph laser oscillator. Previously hidden internal dynamics of soliton molecules can now be accessed by employing the time-stretch dispersive Fourier transform (TS-DFT), which enables us to track the double-pulse separation and relative phase in real-time [1].

In the current work, we actively drive internal vibrations over a range of frequencies and amplitudes by weakly modulating the pump power. We resolve internal resonances of the soliton molecule, and detect higher harmonic and subharmonic responses. These observations are related to simulations in the framework of the complex Ginzburg-Landau equation. Beyond perturbative excitations, we apply stronger stimuli, which leads to a reversible switching between discrete pulse separations.

[1] G. Herink, F. Kurtz, B. Jalali, D.R. Solli, C. Ropers, Science 356, 50-54 (2017)