Dynamical and Steady State Processes of Probe Absorption-Dispersion in a Four-Level Quantum Dot Nanostructure
E. Asadi Amirabadi a, M. Jamshidnejad b, S. Miraboutalebi b and S.H. Asadpourc
aYoung Researchers and Elite Club, Marvdasht Branch, Islamic Azad University, Marvdasht, Iran
bDepartment of Physics, Faculty of Science, Islamic Azad University, North Tehran Branch, Tehran, Iran
cDepartment of Physics, Marvdasht Branch, Islamic Azad University, Marvdasht, Iran
Received: April 11, 2016; In final form: January 12, 2017
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In this paper, we investigated the transient electron population and the transient behaviour of the dispersion, absorption and refractive property of weak probe light in a four-level InGaN/GaN quantum dot nanostructure. In order to achieve the wave functions and their corresponding energy levels of the mentioned quantum dot nanostructure, the Schrödinger and Poisson equations is solved selfconsistently for carriers (here electron) in quantum dot. Our findings show that the properties of transient processes can be dramatically affected by parameters such as intensity, detuning and relative phase of applied fields. Our proposed scheme provides a realistic model for transient control of refraction index properties in a quantum dot nanostructure. These results may have potential applications in high speed optical switch for quantum information technologies.

DOI: 10.12693/APhysPolA.131.1460
PACS/topics: quantum dot nanostructure, absorption, dispersion, optical transient processes