Application of the Double Parabolic Quantum Well in a Laser

Authors: Molinar-Tabares, Martín E.; Campoy-Güereña, Germán

Source: Journal of Computational and Theoretical Nanoscience, Volume 7, Number 11, November 2010 , pp. 2308-2313(6)

Publisher: American Scientific Publishers

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We propose an alternative method for the development of AlxGa1−x As semiconductor laser diodes. The emission of this device is based on the behavior of the electrons inside of a system where the deposition with variable concentration of semiconductors creates a structure of two asymmetrical parabolic potential wells. Considering a position-dependent electron effective mass, we solve the Schrödinger equation to calculate the ground state energy, first and second excited state energies and the emission frequency of the laser as well as the relevant factor for the gain. These results are compared with values found in the literature for systems that work with rectangular potential wells. Forming structures or chains consisting of double parabolic potential wells separated by different given distances, the rise of subbands is observed. Our study has been performed considering different parabolic potential wells and a variety of separation distances between the double potential wells on the chains.
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  • Journal of Computational and Theoretical Nanoscience is an international peer-reviewed journal with a wide-ranging coverage, consolidates research activities in all aspects of computational and theoretical nanoscience into a single reference source. This journal offers scientists and engineers peer-reviewed research papers in all aspects of computational and theoretical nanoscience and nanotechnology in chemistry, physics, materials science, engineering and biology to publish original full papers and timely state-of-the-art reviews and short communications encompassing the fundamental and applied research.
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