Wednesday, March 30, 2011

Self-Assembled InGaAs/GaAs Quantum Dots, Volume 60 (Semiconductors and Semimetals)



Self-Assembled InGaAs/GaAs Quantum Dots, Volume 60 (Semiconductors and Semimetals)
Mitsuru Sugawara,Robert K. Willardson,Eicke R. Weber | 1999-04-05 00:00:00 | Academic Press | 368 | Assembly Language Programming
This volume is concerned with the crystal growth, optical properties, and optical device application of the self-formed quantum dot, which is one of the major current subjects in the semiconductor research field.
The atom-like density of states in quantum dots is expected to drastically improve semiconductor laser performance, and to develop new optical devices. However, since the first theoretical prediction for its great possibilities was presented in 1982, due to the difficulty of their fabrication process. Recently, the advent of self-organized quantum dots has made it possible to apply the results in important optical devices, and further progress is expected in the near future.
The authors, working for Fujitsu Laboratories, are leading this quantum-dot research field. In this volume, they describe the state of the art in the entire field, with particular emphasis on practical applications.
Reviews
GaAs and InGaAs compounds are already widely used in many commercial applications that take advantage of the ability to make solid state lasers and light emitting diodes out of them. But if it is possible to make these smaller and cheaper, then the economics may enable even more applications.

Hence the practical emphasis of this book. Though, of course, it is meant for the researcher.

The self assembling property offers a glittering [pun] chance to make cheaper devices. Hopefully, this might eliminate a few lithographic steps and hence help push up device yield. Plus, of course, the small size of the dots leads to novel quantum effects. For example, if the current thresholds could be lowered due to this, it might reduce power consumption, which is no bad thing.

While the book is presented mostly at the research level, you should expect, since the authors are from a company, Fujitsu, with large interests in this topic, that not all the experimental steps might be fully described. The science is. But, for proprietary reasons, experimental steps which cannot be patented might be not disclosed, and held as trade secrets. Which actually is not too different from papers written by university researchers, anyway.

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