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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Theory of near-gap second harmonic generation in centrosymmetric magnetic semiconductors: Europium chalcogenides

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Henriques, A. B. [1] ; Abramof, E. [2] ; Rappl, P. H. O. [2]
Total Authors: 3
[1] Univ Sao Paulo, Inst Fis, BR-05315970 Sao Paulo - Brazil
[2] LAS INPE, BR-12227010 Sao Jose Dos Campos - Brazil
Total Affiliations: 2
Document type: Journal article
Source: Physical Review B; v. 80, n. 24 DEC 2009.
Web of Science Citations: 10

Second harmonic generation is strictly forbidden in centrosymmetric materials, within the electric dipole approximation. Recently, it was found that the centrosymmetric magnetic semiconductors EuTe and EuSe can generate near-gap second harmonics, if the system is submitted to an external magnetic field. Here, a theoretical model is presented, which well describes the observed phenomena. The model shows that second harmonic generation becomes efficient when the magnetic dipole oscillations between the band-edge excited states of the system, induced by the excitation light, enter the in-phase regime, which can be achieved by applying a magnetic field to the material. (AU)

FAPESP's process: 08/09753-3 - Optical detection and control of magnetism in magnetic semiconductors and quantum dots
Grantee:Andre Bohomoletz Henriques
Support type: Regular Research Grants