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### Abstract

The nonlinear optical response of self-assembled quantum dots to cw driving is analyzed via numerical simulations of a spatially resolved rate equation model. The saturation is shown to follow a behavior in between the one for a dominantly, homogeneously, and inhomogeneously broadened medium. Self-lensing is suggested to probe the refractive-index nonlinearities and to open a complementary way of characterizing phase-amplitude coupling (alpha factor) in quantum-dots samples. For conservative assumptions on current samples the minimum focal length is predicted to be +/-1.7 mm for an input beam with 15 mu m radius at a detuning of 1.1 inhomogeneous linewidths from gain center.

Original language | English |
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Article number | 035314 |

Number of pages | 6 |

Journal | Physical Review B |

Volume | 80 |

Issue number | 3 |

DOIs | |

Publication status | Published - Jul 2009 |

### Keywords

- linewidth enhancement factor
- semiconductor optical amplifiers
- differential efficiency
- feedback solitons
- gain saturation
- cavity solitons
- lasers
- beam
- filamentation
- pattern

## Fingerprint Dive into the research topics of 'Saturation and self-lensing in self-assembled quantum dots with constant-wave driving'. Together they form a unique fingerprint.

## Projects

- 1 Finished

## NONLINEAR OPTICS AND LIGHT LOCALIZATION IN QUANTUM DOT

EPSRC (Engineering and Physical Sciences Research Council)

1/01/07 → 30/06/10

Project: Research

## Cite this

Tierno, A., Ackemann, T., Maggipinto, T., & Brambilla, M. G. (2009). Saturation and self-lensing in self-assembled quantum dots with constant-wave driving.

*Physical Review B*,*80*(3), [035314]. https://doi.org/10.1103/PhysRevB.80.035314