Open AccessAnomalous diamagnetic shifts in InP-GaP lateral quantum-wires
Author(s) -
Yong Ho Shin,
Byoung Kyu Choi,
Yongmin Kim,
Jin Dong Song,
Daisuke Nakamura,
Y. Matsuda,
S. Takeyama
Publication year - 2015
Publication title -
optics express
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.23.028349
Subject(s) - diamagnetism , photoluminescence , condensed matter physics , magnetic field , polarization (electrochemistry) , exciton , band gap , materials science , nanowire , quantum dot , optics , physics , optoelectronics , chemistry , quantum mechanics
Linearly polarized photoluminescence (PL) measurements were carried out on InP-GaP lateral nanowires grown using a lateral composition modulation method in pulsed magnetic fields up to ∼ 50 T. In these structures, the energy band alignment becomes type-I and type-II in In-rich wire and Ga-rich barrier regions, respectively. It is revealed that the polarization of the type-I PL is oriented along the [11̄0] crystal direction, whereas that of the type-II PL is along the [110] direction in the absence of magnetic field. These two different PL peaks exhibit anomalous energy shifts with respect to the direction of the magnetic field due to the variation of the confined energy in the exciton center of mass potential.