Optical and magnetic anisotropies of the hole states in Stranski-Krastanov quantum dots

被引:158
作者
Koudinov, AV
Akimov, IA
Kusrayev, YG
Henneberger, F
机构
[1] Humboldt Univ, Inst Phys, D-12489 Berlin, Germany
[2] RAS, AF Ioffe Phys Tech Inst, St Petersburg 194021, Russia
关键词
D O I
10.1103/PhysRevB.70.241305
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Using the trion as a monitor we investigate the anisotropy of the single-hole state in epitaxial CdSe/ZnSe quantum dots. Heavy-light hole mixing caused by a symmetry reduction below D-2d results in elliptical polarization of the optical transitions with a specific axis for each dot defined by strain and shape. In a transverse magnetic field, a quartet of strictly linearly polarized lines appears that reveals the off-diagonal coupling of both electron and hole states. Although induced by the field, the linear polarization is not related to the field orientation, but either along or perpendicular to the dot axis seen at zero field. We find an in-plane hole g factor as large as 0.3 with distinct anisotropic behavior.
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页码:1 / 4
页数:4
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