Projects per year

### Abstract

The nonlinear optical response of self-assembled quantum dots is relevant to the application of quantum dot based devices in nonlinear optics, all-optical switching, slow light and self-organization. Theoretical investigations are based on numerical simulations of a spatially and spectrally resolved rate equation model, which takes into account the strong coupling of the quantum dots to the carrier reservoir created by the wetting layer states. The complex dielectric susceptibility of the ground state is obtained. The saturation is shown to follow a behavior in between the one for a dominantly homogeneously and inhomogeneously broadened medium. Approaches to extract the nonlinear refractive index change by fringe shifts in a cavity or self-lensing are discussed. Experimental work on saturation characteristic of InGa/GaAs quantum dots close to the telecommunication O-band (1.24-1.28 mm) and of InAlAs/GaAlAs quantum dots at 780 nm is described and the first demonstration of the cw saturation of absorption in room temperature quantum dot samples is discussed in detail.

Original language | English |
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Title of host publication | Quantum dot devices |

Editors | Z.M. Wang |

Place of Publication | New York |

Publisher | Springer |

Pages | 251-295 |

Number of pages | 45 |

Volume | 13 |

ISBN (Print) | 9781461435693 |

DOIs | |

Publication status | Published - 2012 |

### Publication series

Name | Lecture Notes in Nanoscale Science and Technology |
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Publisher | Springer |

Volume | 13 |

ISSN (Print) | 2195-2159 |

### Keywords

- nonlinear optics
- quantum dot samples
- continuous wave driving
- semiconductor quantum dot-sensitized solar cells
- colloidal quantum dots
- optoelectronic appllications
- photonic crystal cavity lasers
- quantum dot devices book
- quantum dot lasers
- quantum dots
- quantum dot LEDs
- quantum dot infrared photodetectors
- quantum dot lasers catastrophic optical damage
- quantum dot mode
- locked lasers
- exotic behavior
- quantum dot solar cells
- quantum dot switches
- quantum dots book
- quantum optical transistor

## 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

Ackemann, T., Tierno, A., Kuszelewicz, R., Barbay, S., Brambilla, M. G., Leburn, C. G., & Brown, C. T. A. (2012). Nonlinear optics and saturation behavior of quantum dot samples under continuous wave driving. In Z. M. Wang (Ed.),

*Quantum dot devices*(Vol. 13, pp. 251-295). (Lecture Notes in Nanoscale Science and Technology; Vol. 13). Springer. https://doi.org/10.1007/978-1-4614-3570-9