Magnetic field control of absorption coefficient and group index in an impurity doped quantum disc

Ecaterina C. Niculescu, Cristina Stan (), Gabriela Tiriba and Cristina Truşcǎ
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Ecaterina C. Niculescu: Physics Department, “Politehnica” University of Bucharest
Cristina Stan: Physics Department, “Politehnica” University of Bucharest
Gabriela Tiriba: Physics Department, “Politehnica” University of Bucharest
Cristina Truşcǎ: Physics Department, “Politehnica” University of Bucharest

The European Physical Journal B: Condensed Matter and Complex Systems, 2017, vol. 90, issue 5, 1-11

Abstract: Abstract The electronic properties and optical characteristics – absorption coefficient, refractive index and group index – in an impurity doped pseudo-harmonic quantum disc subjected to an applied magnetic field are investigated. Numerical calculations are performed using the exact diagonalization technique and the compact density-matrix formalism. It is found that the chosen structure could be switched between a lambda-type and a ladder-type configuration by a proper tailoring of the magnetic field strength. Furthermore, the absorption profile and the associated slow light frequency range can be controlled not only by varying the control field amplitude and its detuning but also by changing the impurity position and the magnetic field strength.

Keywords: Mesoscopic; and; Nanoscale; Systems (search for similar items in EconPapers)
Date: 2017
References: View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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DOI: 10.1140/epjb/e2017-80138-0

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