## Abstract

This paper compares and contrasts different theoretical approaches with experimental measurements of transport in optoelectronic devices based on semiconductor heterostructures. The Monte Carlo method which makes no a priori assumptions about the carrier distribution in momentum or phase space is compared with less computationally demanding energy-balance rate equation models which assume thermalised carrier distributions. It is shown that the two approaches produce qualitatively similar results for the specific case of hole transport in p-type Si_{1-x}Ge_{x}/Si superlattices designed for terahertz emission though there are significant differences which originate in the absolute values of the carrier kinetic energy in the plane of the quantum wells. In contrast to this, simulations of electron transport in n-type GaAs/Ga_{1-x}Al_{x}As terahertz quantum cascade lasers show a more similar behaviour between both theoretical approaches. In addition, the very good comparison with experiment substantiates the Incoherent scattering approach which underpins both methods. Further evidence to support the applicability of carrier transport in semiconductor heterostructures at finite temperature being dominated by incoherent scattering, which can be modelled by self-consistent energy-balance rate equations, is given by further comparisons with experimental measurements of two other categories of devices namely quantum well infrared photodetectors and quantum dot infrared photodetectors.

Original language | English |
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Title of host publication | Proceedings of the 10th Biennial Baltic Electronics Conference 2006 |

Publisher | IEEE |

Pages | 11-18 |

Number of pages | 8 |

ISBN (Electronic) | 1424404150 |

ISBN (Print) | 9781424404142 |

DOIs | |

Publication status | Published - 20 Feb 2007 |

Externally published | Yes |

Event | 10th International Biennial Baltic Electronics Conference 2006 - Tallinn, Estonia Duration: 2 Oct 2006 → 4 Oct 2006 Conference number: 10 |

### Publication series

Name | International Baltic Electronics Conference |
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Publisher | IEEE |

Volume | 2006 |

ISSN (Print) | 1736-3705 |

ISSN (Electronic) | 2382-820X |

### Conference

Conference | 10th International Biennial Baltic Electronics Conference 2006 |
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Abbreviated title | BEC 2006 |

Country/Territory | Estonia |

City | Tallinn |

Period | 2/10/06 → 4/10/06 |