Quantum dot cascade laser: Arguments in favor

Details Quantum dot cascade laser: Arguments in favor Quantum dot cascade laser: Arguments in favor

2007-11-27

arxiv.org/abs/0711.4294v1

Physics

Condensed Matter

Other Condensed Matter

4 pages, 2 figures; Proceedings of MSS13 to be published in Physica E

Scientific paper

10.1016/j.physe.2007.09.055

Quantum cascade lasers are recognized as propitious candidates for future terahertz optoelectronics. Here we demonstrate several definite advantages of quantum dot cascade structures over quantum well devices, which suffer fundamental performance limitations owing to continuous carrier spectrum. The discrete spectrum of quantum dots opens an opportunity to control the non-radiative relaxation and optical loss and also provides for more flexibility in the choice of an optical and electrical design of the laser.

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