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Directed transversal laser-emission from electrically-driven quantum-dot microplillar-resonators

Schematic of a micropillar with optical excitation from the top and highly-directed lateral side-emission

Microdisk lasers with a lateral emission-profile can be fabricated without cleaving the wafer in contrast to, e.g, edge-emitting lasers. Hence, they are promising candidates for on-chip quantum optics.

This projects aims at the realization of quantum-dot microdisk lasers for electrical operation. The lasers will have large Q-values and small mode volumes. Using a Limacon-shaped cross-section they will be optimized to allow for lateral directional emission into a small angular range.


Prof. Dr. J. Wiersig, Institute of Theoretical Physics, Otto-von-Guericke University in Magdeburg, Germany

Prof. Dr. M. Kamp, Technische Physik, University of Würzburg, Germany

Finished: 08.2014

Funded by:

German Research Foundation, Grant-No.: Re2974/2-1


[1] F. Albert, T. Braun, T. Heidel, C. Schneider, S. Reitzenstein, S. Höfling, L. Worschech, and A. Forchel, "Whispering gallery mode lasing in electrically driven quantum dot micropillars", Appl. Phys. Lett, 97:101108, 2010.

[2] F. Albert, C. Hopfmann, S. Reitzenstein, C. Schneider, S. Höfling, L. Worschech, M. Kamp,W. Kinzel, A. Forchel, and I. Kanter, "Observing chaos for quantum-dot microlasers with external feedback", Nature Comm., 2:336, 2011.

[3] S. Reitzenstein, T. Heindel, C. Kistner, F. Albert, T. Braun, C. Hopfmann, P. Mrowinski, M. Lermer, C. Schneider, S. Höfling, M. Kamp, and A. Forchel, "Electrically driven quantum dot micropillar light sources", IEEE J. Sel. Top. Quantum Electron., 17:1670, 2011"

[4] F. Albert, C. Hopfmann, A. Eberspächer, F. Arnold, M. Emmerling, C. Schneider, S. Höfling, A. Forchel, M. Kamp, J. Wiersig, and S. Reitzenstein, „Directional whispering gallery mode emission from Limacon-shaped electrically pumped quantum dot micropillar lasers“, Appl. Phys. Lett. 101, 021116 (2012)

[5] H.A.M. Leymann, A. Foerster, and J. Wiersig, "Expectation value based cluster expansion", Phys. Status Solidi C, 10:1242, 2013.

[6] H.A.M. Leymann, A. Foerster, M. Khanbekyan, and J. Wiersig, "Strong photon bunching in a quantum-dot-based two-mode microcavity laser",  Phys. Status Solidi B, 250:1777, 2013.

[7] H.A.M. Leymann, C. Hopfmann, F. Albert, A. Foerster, M. Khanbekyan, C. Schneider, S. Höfling, A. Forchel, M. Kamp, J. Wiersig, and S. Reitzenstein, "Intensity fluctuations in bimodal micropillar lasers enhanced by quantum-dot gain competition", Phys. Rev. A, 87:053819, 2013.

[8] E. Stock, F. Albert, C. Hopfmann, M. Lermer, C. Schneider, S. Höfling, A. Forchel, M. Kamp, and S. Reitzenstein, "On-chip quantum optics with quantum dot microcavities", Adv. Mat., 25:707–710, 2013

[9] C. Hopfmann, F. Albert, C. Schneider, S. Höfling, M. Kamp, A. Forchel, I. Kanter, and S. Reitzenstein, "Nonlinear emission characteristics of quantum dot–micropillar lasers in the presence of polarized optical feedback", New J. Phys., 15:025030, 2013.

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