Self-assembly of concentric quantum double rings.
We demonstrate the self-assembled formation of concentric quantum double rings with high uniformity and excellent rotational symmetry using the droplet epitaxy technique. Varying the growth process conditions can control each ring's size. Photoluminescence spectra emitted from an individual quantum ring complex show peculiar quantized levels that are specified by the carriers' orbital trajectories.
Mano
Takaaki
T
Nanomaterials Laboratory, National Institute for Materials Science, 1-2-1 Sengen, Tsukuba, Ibaraki 305-0047, Japan. MANO.Takaaki@nims.go.jp
Kuroda
Takashi
T
Sanguinetti
Stefano
S
Ochiai
Tetsuyuki
T
Tateno
Takahiro
T
Kim
Jongsu
J
Noda
Takeshi
T
Kawabe
Mitsuo
M
Sakoda
Kazuaki
K
Kido
Giyuu
G
Koguchi
Nobuyuki
N
D001152:Arsenicals / Q000032:analysis / Q000737:chemistry*; D003198:Computer Simulation; D003460:Crystallization / Q000379:methods*; D005708:Gallium / Q000032:analysis / Q000737:chemistry*; D008956:Models, Chemical; D008958:Models, Molecular; D008968:Molecular Conformation; D049329:Nanostructures / Q000032:analysis / Q000737:chemistry* / Q000648:ultrastructure*; D010316:Particle Size; D045663:Quantum Dots; D011789:Quantum Theory; D013329:Structure-Activity Relationship
D001152:Arsenicals; C043055:gallium arsenide; D005708:Gallium