Post-Growth Intermixing of GaAs Based Quantum Dot Devices

Chapter
Part of the Lecture Notes in Nanoscale Science and Technology book series (LNNST, volume 13)

Abstract

Post-growth intermixing is a powerful technique currently applied in areas such as high power laser arrays and photonics integrated circuits. The application of this technique to quantum dot (QD) based laser materials is of significant interest offering new types of device and allows large-scale integrated devices, but brings about new challenges. In this paper, we will initially review quantum well (QW) intermixing processes and applications and move on to describe specific differences between QW and QD based materials and review the literature on various forms of QD intermixing. Structural and spectroscopic studies of intermixed QD materials will be discussed, and the importance of modulation p-doping of structures will be highlighted. We will then go on to describe active intermixed QD devices including both lasers and broadband devices such as super luminescent diodes and amplifiers, and conclude with our latest results on selective area intermixed devices.

Keywords

Quantum well Quantum dot  Post-growth intermixing  Group III vacancies  Group III interstitials  Laser diodes  Superluminescent light emitting diodes  Photonic integrated circuits  

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Copyright information

© Springer Science+Business Media New York 2012

Authors and Affiliations

  1. 1.EPSRC National Centre for III-V Technologies, Department of Electronic and Electrical Engineering, Centre for Nanoscience and TechnologyUniversity of SheffieldSheffieldUK

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