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Binding energy of hydrogenic impurities in quantum dots under intense laser radiation

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Gonzalez-Santander, C. and Apostolova, T. and Domínguez-Adame Acosta, Francisco (2013) Binding energy of hydrogenic impurities in quantum dots under intense laser radiation. Journal of physics: Condensed matter, 25 (33). ISSN 0953-8984

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Official URL: http://dx.doi.org/10.1088/0953-8984/25/33/335802


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Abstract

We calculate the binding energy of on-and off-center hydrogenic impurities in a parabolic quantum dot subjected to an intense high-frequency laser field. An exactly solvable model that replaces the actual Coulomb interaction with the donor by a non-local separable potential is introduced for calculating the binding energy. The separable potential allows us to solve the problem exactly and all calculations are carried out analytically. The action of the laser irradiation results in dressed Coulomb and confinement potentials. At low laser intensity the binding energy is found to decrease when the impurity is shifted away from the origin. At high laser intensity and strong confinement the opposite behavior is observed. We propose a simple one-dimensional model that explains the observed crossover.


Item Type:Article
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©2013 IOP Publishing Ltd.
Work at Madrid was supported by MICINN (project MAT2010-17180). CG-S acknowledges financial support from Comunidad de Madrid and European Social Foundation. TA was sponsored by the Air Force Office of Scientific Research, Air Force Material Command, USAF, under grant number FA8655-12-1-2052.

Uncontrolled Keywords:States; Fields; Donors; Superintense; Atoms; Well
Subjects:Sciences > Physics > Materials
Sciences > Physics > Solid state physics
ID Code:31018
Deposited On:23 Jun 2015 14:57
Last Modified:30 Jun 2015 07:56

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