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Nonlinear Photonics in semiconductor lasers: Solitonic microlasers and spin effects

  • IFISC Seminar

  • Thorsten Ackemann
  • Strathclyde University, Glasgow, Scotland
  • March 27, 2012, 2:30 p.m.
  • IFISC Seminar Room
  • Announcement file

Vertical-cavity surface-emitting lasers (VCSELs) show a very complex phenomenology of instabilities due to the presence of a large number of spatial, spectral and polarization degrees of freedom interacting with nonlinearities and disorder. Though the resulting limitations of their spatial and temporal coherence are usually considered to be a nuisance in applications, a proper understanding and design of the underlying self-organization processes can lead to new functionalities and devices. By frequency-selective feedback, emission can be funnelled into coherent microlasers which can be optically controlled, i.e. switched-on and off by external optical beams. These microlasers are a special form of a spatial soliton. We demonstrate frequency- and phase-locking of solitons defying the disorder. The locking phase vs. detuning follows an Adler scenario. Synchronization of laser solitons might provide a test bed for the interaction of complex networks of nonlinear oscillators. Spin dynamics can lead to ultra-fast self-oscillations based on polarization oscillations induced by birefringence, which are not subject to the usual limits for laser modulation given by the damping of intensity relaxation oscillations.



Coffee and cookies will be served 15 minutes before the start of the seminar


Contact details:

Manuel Matías

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