標題: Magneto-optical response of layers of semiconductor quantum dots and nanorings
作者: Voskoboynikov, O
Wijers, CMJ
Liu, JL
Lee, CP
應用數學系
電子工程學系及電子研究所
Department of Applied Mathematics
Department of Electronics Engineering and Institute of Electronics
公開日期: 1-六月-2005
摘要: In this paper a comparative theoretical study was made of the magneto-optical response of square lattices of nanoobjects (dots and rings). Expressions for both the polarizability of the individual objects as their mutual electromagnetic interactions (for a lattice in vacuum) was derived. The quantum-mechanical part of the derivation is based upon the commonly used envelope function approximation. The description is suited to investigate the optical response of these layers in a narrow region near the interband transitions onset, particularly when the contribution of individual level pairs can be separately observed. A remarkable distinction between clearly quantum-mechanical and classical electromagnetic behavior was found in the shape and volume dependence of the polarizability of the dots and rings. This optical response of a single plane of quantum dots and nanorings was explored as a function of frequency, magnetic field, and angle of incidence. Although the reflectance of these layer systems is not very strong, the ellipsometric angles are large. For these isolated dot-ring systems they are of the order of magnitude of degrees. For the ring systems a full oscillation of the optical Bohm-Ahronov effect could be isolated. Layers of dots do not display any remarkable magnetic field dependence. Both type of systems, dots and rings, exhibit an outspoken angular-dependent dichroism of quantum-mechanical origin.
URI: http://dx.doi.org/10.1103/PhysRevB.71.245332
http://hdl.handle.net/11536/13596
ISSN: 1098-0121
DOI: 10.1103/PhysRevB.71.245332
期刊: PHYSICAL REVIEW B
Volume: 71
Issue: 24
結束頁: 
顯示於類別:期刊論文