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We propose a novel class of large-area single-mode semiconductor lasers in which notions from parity-time symmetry is employed to reliably suppress higher-order modes. The feasibility of our design is investigated in InGaAsP quantum-well arrangements.
We report on the observation of relativistic wave evolution in a waveguide array. The high frequency trembling motion, known as Zitterbewegung is observed in specially designed waveguide arrays.
We report on the first experimental realization of topological crystals, solely formed by a geometric potential of an undulated slab waveguide. Transport mechanisms like Bloch oscillations and Zener tunneling are demonstrated.
We predict theoretically and observe experimentally novel defect-free surface waves in truncated arrays of coupled optical waveguides with periodically bent axes, demonstrating their different properties compared to the previously studied Tamm or Shockley type states.
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