Tuning the g-factor of neutral and charged excitons confined to self-assembled (Al,Ga)As shell quantum dots

被引：7
|
作者：
Corfdir, P. [1 ]
Fontana, Y. [2 ]
Van Hattem, B. [1 ]
Russo-Averchi, E. [2 ]
Heiss, M. [2 ]
Fontcuberta i Morral, A. [2 ]
Phillips, R. T. [1 ]
机构：
[1] Univ Cambridge, Cavendish Lab, Cambridge CB3 0HE, England
[2] Ecole Polytech Fed Lausanne, Inst Mat, Lab Mat Semicond, CH-1015 Lausanne, Switzerland
来源：
APPLIED PHYSICS LETTERS | 2014年 / 105卷 / 22期
关键词：
GAAS NANOWIRES; HETEROSTRUCTURES; EMISSION; PROBE; WELLS;
D O I：
10.1063/1.4903515
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
We study the neutral exciton (X) and charged exciton (CX) transitions from (Al,Ga) As shell quantum dots located in core-shell nanowires, in the presence of a magnetic field. The g-factors and the diamagnetic coefficients of both the X and the CX depend on the orientation of the field with respect to the nanowire axis. The aspect ratio of the X wavefunction is quantified based on the anisotropy of the diamagnetic coefficient. For specific orientations of the magnetic field, it is possible to cancel the g-factor of the bright states of the X and the CX by means of an inversion of the sign of the hole's g-factor, which is promising for quantum information processing applications. (C) 2014 AIP Publishing LLC.
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页数：4
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