SIZE DEPENDENCE OF LATERAL QUANTUM-CONFINEMENT EFFECTS OF THE OPTICAL-RESPONSE IN IN0.53GA0.47AS/INP QUANTUM WIRES

被引:20
作者
NOTOMI, M [1 ]
NOJIMA, S [1 ]
OKAMOTO, M [1 ]
IWAMURA, H [1 ]
TAMAMURA, T [1 ]
HAMMERSBERG, J [1 ]
WEMAN, H [1 ]
机构
[1] LINKOPING UNIV, DEPT PHYS & MEASUREMENT TECHNOL, S-58183 LINKOPING, SWEDEN
关键词
D O I
10.1103/PhysRevB.52.11073
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
The size dependence of various aspects of quantum-confinement effects in In0.53Ga0.47As/InP quantum wires was quantitatively examined through photoluminescence experiments with and without magnetic field, along with theoretical calculation. The wires were fabricated by combining electron-beam lithography and reverse-mesa wet etching, thus enabling us to easily control the lateral size independently of the vertical size. Photoluminescence experiments showed distinct peak shifts with changes in the lateral size and showed a shoulder structure that is attributed to laterally quantized second subbands. The energy shift of both levels is explained by a detailed theoretical calculation that incorporates conduction-band nonparabolicity, valence-band coupling, and excitonic correction. The lateral quantum confinement is also demonstrated by the magnetic-field effect on the luminescence spectrum, in which we can distinguish the lateral quantum effects from other factors. As magnetic-field strength increases, a transition from quantum-confined subbands to Landau subbands was clearly observed for first and second subbands. At high excitation levels, the quenching of higher Landau levels was observed. Inplane and perpendicular-to-plane anisotropy of polarization in luminescence was also investigated and the size dependence of this anisotropy in both directions is largely explained by the calculated lateral confinement effect of the optical-transition matrix elements. The phenomenon observed for narrower wires, however, cannot be explained by our theory and is thought to be due to wave-function localization.
引用
收藏
页码:11073 / 11088
页数:16
相关论文
共 52 条
[1]   MULTIDIMENSIONAL QUANTUM WELL LASER AND TEMPERATURE-DEPENDENCE OF ITS THRESHOLD CURRENT [J].
ARAKAWA, Y ;
SAKAKI, H .
APPLIED PHYSICS LETTERS, 1982, 40 (11) :939-941
[2]  
ASADA M, 1985, JPN J APPL PHYS PT 2, V95, P78
[3]   NARROW TWO-DIMENSIONAL ELECTRON-GAS CHANNELS IN GAAS/AIGAAS SIDEWALL INTERFACES BY SELECTIVE GROWTH [J].
ASAI, H ;
YAMADA, S ;
FUKUI, T .
APPLIED PHYSICS LETTERS, 1987, 51 (19) :1518-1530
[4]   EIGENFUNCTION-EXPANSION METHOD FOR SOLVING THE QUANTUM-WIRE PROBLEM - FORMULATION [J].
BARAFF, GA ;
GERSHONI, D .
PHYSICAL REVIEW B, 1991, 43 (05) :4011-4022
[5]  
BASTARD G, 1991, SOLID STATE PHYSICS, V44
[6]   MAGNETIC DEPOPULATION OF 1D SUBBANDS IN A NARROW 2D ELECTRON-GAS IN A GAAS-ALGAAS HETEROJUNCTION [J].
BERGGREN, KF ;
THORNTON, TJ ;
NEWSON, DJ ;
PEPPER, M .
PHYSICAL REVIEW LETTERS, 1986, 57 (14) :1769-1772
[7]   EXCITON BINDING-ENERGY IN A QUANTUM-WELL WIRE [J].
BROWN, JW ;
SPECTOR, HN .
PHYSICAL REVIEW B, 1987, 35 (06) :3009-3012
[8]   STEP-FLOW GROWTH ON STRAINED SURFACES - (AL,GA)SB TILTED SUPERLATTICES [J].
CHALMERS, SA ;
KROEMER, H ;
GOSSARD, AC .
APPLIED PHYSICS LETTERS, 1990, 57 (17) :1751-1753
[9]   ENHANCEMENT OF THE ELECTRONIC EFFECTIVE-MASS IN QUANTUM WIRES [J].
CHEN, R ;
BAJAJ, KK .
PHYSICAL REVIEW B, 1994, 50 (03) :1949-1952
[10]   QUANTUM STATES OF CONFINED CARRIERS IN VERY THIN ALXGA1-XAS-GAAS-ALXGA1-XAS HETEROSTRUCTURES [J].
DINGLE, R ;
WIEGMANN, W ;
HENRY, CH .
PHYSICAL REVIEW LETTERS, 1974, 33 (14) :827-830