INTERFACE EXCITONS IN STAGGERED-LINE-UP QUANTUM-WELLS - THE ALAS/GAAS CASE

被引：40

作者：

ZIMMERMANN, R

BIMBERG, D

机构：

[1] TECH UNIV BERLIN,INST FESTKORPERPHYS,W-1000 BERLIN 12,GERMANY

[2] UNIV CALIF SANTA BARBARA,CTR QUANTIZED ELECTR STUDIES,SANTA BARBARA,CA 93106

来源：

PHYSICAL REVIEW B | 1993年 / 47卷 / 23期

关键词：

D O I：

10.1103/PhysRevB.47.15789

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

For spatially indirect excitons in staggered-line-up single quantum wells, binding energies, Bohr radii, and Oscillator strengths are calculated, taking into account finite barrier heights and image-charge effects. Numerical results are presented for a model case of particular fundamental importance. For AlAs/GaAs quantum wells, which are indirect in k space, we find binding energies up to 11 meV for the X(z) exciton and 5 meV for the X(xy) exciton. However, no-phonon oscillator strengths fall below the direct exciton by five orders of magnitude. A comparison to experiment suggests that the X(xy) exciton is lowest in energy.

引用

收藏

页码：15789 / 15793

页数：5

相关论文

共 24 条

[1] HYDROGENIC IMPURITY STATES IN A QUANTUM WELL - A SIMPLE-MODEL [J].

BASTARD, G .

PHYSICAL REVIEW B, 1981, 24 (08) :4714-4722

[2] BINARY ALAS/GAAS VERSUS TERNARY GAALAS/GAAS INTERFACES - A DRAMATIC DIFFERENCE OF PERFECTION [J].

BIMBERG, D ;

HEINRICHSDORFF, F ;

BAUER, RK ;

GERTHSEN, D ;

STENKAMP, D ;

MARS, DE ;

MILLER, JN .

JOURNAL OF VACUUM SCIENCE & TECHNOLOGY B, 1992, 10 (04) :1793-1798

[3] A DENSE ELECTRON-HOLE-LIQUID IN GA0.08AL0.92AS [J].

BIMBERG, D ;

BLUDAU, W ;

LINNEBACH, R ;

BAUSER, E .

SOLID STATE COMMUNICATIONS, 1981, 37 (12) :987-991

[4] BAND OFFSETS AND TRANSITIVITY OF IN1-XGAXAS/IN1-YALYAS/INP HETEROSTRUCTURES [J].

BOHRER, J ;

KROST, A ;

WOLF, T ;

BIMBERG, D .

PHYSICAL REVIEW B, 1993, 47 (11) :6439-6443

[5] STAGGERED-LINEUP HETEROJUNCTIONS AS SOURCES OF TUNABLE BELOW-GAP RADIATION - EXPERIMENTAL-VERIFICATION [J].

CAINE, EJ ;

SUBBANNA, S ;

KROEMER, H ;

MERZ, JL ;

CHO, AY .

APPLIED PHYSICS LETTERS, 1984, 45 (10) :1123-1125

[6] BAND OFFSETS AND EXCITONS IN CDTE (CD,MN)TE QUANTUM WELLS [J].

CHANG, SK ;

NURMIKKO, AV ;

WU, JW ;

KOLODZIEJSKI, LA ;

GUNSHOR, RL .

PHYSICAL REVIEW B, 1988, 37 (03) :1191-1198

[7] LOCALIZATION INDUCED ELECTRON-HOLE TRANSITION RATE ENHANCEMENT IN GAAS QUANTUM WELLS [J].

CHRISTEN, J ;

BIMBERG, D ;

STECKENBORN, A ;

WEIMANN, G .

APPLIED PHYSICS LETTERS, 1984, 44 (01) :84-86

[8] LINE-SHAPES OF INTERSUBBAND AND EXCITONIC RECOMBINATION IN QUANTUM-WELLS - INFLUENCE OF FINAL-STATE INTERACTION, STATISTICAL BROADENING, AND MOMENTUM CONSERVATION [J].

CHRISTEN, J ;

BIMBERG, D .

PHYSICAL REVIEW B, 1990, 42 (11) :7213-7219

[9]

DINGLE R, 1987, SEMICONDUCTORS SEMIM, V24

[10]

Duggan G., 1987, Proceedings of the SPIE - The International Society for Optical Engineering, V792, P147, DOI 10.1117/12.940833