Atomically precise GaAs/AlGaAs quantum dots fabricated by twofold cleaved edge overgrowth

被引：71

作者：

Wegscheider, W

Schedelbeck, G

Abstreiter, G

Rother, M

Bichler, M

机构：

[1] Walter Schottky Institut, Technische Universität München, Garching, D-85748, Am Coulombwall

来源：

PHYSICAL REVIEW LETTERS | 1997年 / 79卷 / 10期

关键词：

D O I：

10.1103/PhysRevLett.79.1917

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The formation of a 7 x 7 x 7 nm(3) size GaAs quantum dot (QD) at the intersection of three quantum wells is demonstrated for the first time. Intense radiative recombination between zero-dimensional states in the QDs is clearly identified by microscopic photoluminescence (mu PL). In contrast to the inhomogeneously broadened quantum well and quantum wire signals originating from the complex twofold cleaved edge overgrowth structure, the strongly spatially localized QD response is characterized by spectrally sharp lines in mu PL excitation spectra with a linewidth below 70 mu eV.

引用

收藏

页码：1917 / 1920

页数：4

相关论文

共 22 条

[1] ELECTRON-HOLE TRANSITIONS BETWEEN STATES WITH NONZERO ANGULAR MOMENTA IN THE MAGNETOLUMINESCENCE OF QUANTUM DOTS [J].

BAYER, M ;

SCHMIDT, A ;

FORCHEL, A ;

FALLER, F ;

REINECKE, TL ;

KNIPP, PA ;

DREMIN, AA ;

KULAKOVSKII, VD .

PHYSICAL REVIEW LETTERS, 1995, 74 (17) :3439-3442

[2] PHOTOLUMINESCENCE FROM A SINGLE GAAS/ALGAAS QUANTUM DOT [J].

BRUNNER, K ;

BOCKELMANN, U ;

ABSTREITER, G ;

WALTHER, M ;

BOHM, G ;

TRANKLE, G ;

WEIMANN, G .

PHYSICAL REVIEW LETTERS, 1992, 69 (22) :3216-3219

[3] SHARP-LINE PHOTOLUMINESCENCE OF EXCITONS LOCALIZED AT GAAS/ALGAAS QUANTUM-WELL INHOMOGENEITIES [J].

BRUNNER, K ;

ABSTREITER, G ;

BOHM, G ;

TRANKLE, G ;

WEIMANN, G .

APPLIED PHYSICS LETTERS, 1994, 64 (24) :3320-3322

[4] SHARP-LINE PHOTOLUMINESCENCE AND 2-PHOTON ABSORPTION OF ZERO-DIMENSIONAL BIEXCITONS IN A GAAS/ALGAAS STRUCTURE [J].

BRUNNER, K ;

ABSTREITER, G ;

BOHM, G ;

TRANKLE, G ;

WEIMANN, G .

PHYSICAL REVIEW LETTERS, 1994, 73 (08) :1138-1141

[5] A NEW ONE-DIMENSIONAL QUANTUM WELL STRUCTURE [J].

CHANG, YC ;

CHANG, LL ;

ESAKI, L .

APPLIED PHYSICS LETTERS, 1985, 47 (12) :1324-1326

[6] Fine structure splitting in the optical spectra of single GaAs quantum dots [J].

Gammon, D ;

Snow, ES ;

Shanabrook, BV ;

Katzer, DS ;

Park, D .

PHYSICAL REVIEW LETTERS, 1996, 76 (16) :3005-3008

[7] OBSERVATION OF QUANTUM WIRE FORMATION AT INTERSECTING QUANTUM-WELLS [J].

GONI, AR ;

PFEIFFER, LN ;

WEST, KW ;

PINCZUK, A ;

BARANGER, HU ;

STORMER, HL .

APPLIED PHYSICS LETTERS, 1992, 61 (16) :1956-1958

[8] OPTICAL SPECTROSCOPY OF A GAAS/ALGAAS QUANTUM-WIRE STRUCTURE USING NEAR-FIELD SCANNING OPTICAL MICROSCOPY [J].

GROBER, RD ;

HARRIS, TD ;

TRAUTMAN, JK ;

BETZIG, E ;

WEGSCHEIDER, W ;

PFEIFFER, L ;

WEST, K .

APPLIED PHYSICS LETTERS, 1994, 64 (11) :1421-1423

[9] ULTRANARROW LUMINESCENCE LINES FROM SINGLE QUANTUM DOTS [J].

GRUNDMANN, M ;

CHRISTEN, J ;

LEDENTSOV, NN ;

BOHRER, J ;

BIMBERG, D ;

RUVIMOV, SS ;

WERNER, P ;

RICHTER, U ;

GOSELE, U ;

HEYDENREICH, J ;

USTINOV, VM ;

EGOROV, AY ;

ZHUKOV, AE ;

KOPEV, PS ;

ALFEROV, ZI .

PHYSICAL REVIEW LETTERS, 1995, 74 (20) :4043-4046

[10] Formation of quantum dots in twofold cleaved edge overgrowth [J].

Grundmann, M ;

Bimberg, D .

PHYSICAL REVIEW B, 1997, 55 (07) :4054-4056