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Pis'ma v Zhurnal Èksperimental'noi i Teoreticheskoi Fiziki, 2009, Volume 89, Issue 3, Pages 158–164
(Mi jetpl355)
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CONDENSED MATTER
Dynamics of the magnetic-field-induced optical alignment of triplet bound excitons in GaSe under resonant excitation conditions
A. N. Starukhin, D. K. Nelson, B. S. Razbirin Ioffe Physico-Technical Institute, Russian Academy of Sciences
Abstract:
The dynamics of the transverse-magnetic-field-induced linear polarization of the radiation of triplet bound excitons in uniaxial crystals has been studied by time-resolved spectroscopy on an example of GaSe under resonant excitation by linearly polarized light. The linear polarization of the radiation arises due to the difference between the behaviors of its π- and σ-components in a magnetic field. It has been found that the magnetic-field dependences of the π- and σ-component intensities are functions of the pump light polarization and vary considerably with the lifetime t of the excited states. It has been revealed that the resonant excitation of excitons by light polarized with E‖B and E ⊥ B is accompanied by the magnetic-field-induced alignment of their dipole moments along the vector E of the pump light. In the case of excitation by light with E ⊥ B, the optical alignment of excitons is observed only in the initial period of their life, and the linear polarization of exciton radiation changes sign at a certain t>t 0. A theoretical description of these effects is proposed.
Received: 29.12.2008
Citation:
A. N. Starukhin, D. K. Nelson, B. S. Razbirin, “Dynamics of the magnetic-field-induced optical alignment of triplet bound excitons in GaSe under resonant excitation conditions”, Pis'ma v Zh. Èksper. Teoret. Fiz., 89:3 (2009), 158–164; JETP Letters, 89:3 (2009), 139–144
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https://www.mathnet.ru/eng/jetpl355 https://www.mathnet.ru/eng/jetpl/v89/i3/p158
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Abstract page: | 189 | Full-text PDF : | 65 | References: | 40 |
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