Design of In[sub x]Ga[sub 1−x]As[sub 1−y]N[sub y]∕AlAs quantum cascade structures for 3.4 μm intersubband emission
Dang, Y. X.
Date of Issue2007
School of Electrical and Electronic Engineering
We report the design of an active region of InxGa1−xAs1−yNy /AlAs quantum cascade laser structure emitting in the near infrared wavelength range based on an eight-band k· p model. The InxGa1−xAs1−yNy /AlAs heterostructure system is of significant interest for the development of short wavelength quantum cascade lasers due to its large conduction band discontinuity 1.5 eV and compatibility with the mature GaAs fabrication process. A detailed analysis of the intersubband transition energy within the conduction band as a function of layer thickness, composition, electric field, and temperature has been carried out. Finally, an optimized combination of In0.2Ga0.8As0.97N0.03 /AlAs three-coupled-well structure has been obtained. Under an applied field of 100 kV/cm and at room temperature, a shortest wavelength of 3.4 m has been achieved by making use of this system without introducing an upper lasing level beyond the X minima of the AlAs barrier
Electrical and Electronic Engineering
Journal of applied physics
© 2007 American Institute of Physics. This paper was published in Journal Of Applied Physics and is made available as an electronic reprint(preprint) with permission of American Institute of Physics. The paper can be found at the following official DOI: http://dx.doi.org/10.1063/1.2717130. One print or electronic copy may be made for personal use only. Systematic or multiple reproduction, distribution to multiple locations via electronic or other means, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper is prohibited and is subject to penalties under law.