Coupled quantum dots fabricated by cleaved edge overgrowth: From artificial atoms to molecules

被引：252

作者：

Schedelbeck, G ^{[1
]}

Wegscheider, W ^{[1
]}

Bichler, M ^{[1
]}

Abstreiter, G ^{[1
]}

机构：

[1] TECH UNIV MUNICH,WALTER SCHOTTKY INST,D-85748 GARCHING,GERMANY

来源：

SCIENCE | 1997年 / 278卷 / 5344期

关键词：

D O I：

10.1126/science.278.5344.1792

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Atomically precise quantum dots of mesoscopic size have been fabricated in the gallium arsenide-aluminum gallium arsenide material system by cleaved edge overgrowth, with a high degree of control over shape, composition, and position. The formation of bonding and antibonding states between two such ''artificial atoms'' was studied as a function of quantum dot separation by microscopic photoluminescence (PL) spectroscopy. The coupling strength within these ''artificial molecules'' is characterized by a systematic dependence, of the separation of the bonding and antibonding levels, and of the PL linewidth, on the ''interatomic'' distance. This model system opens new insights into the physics of coupled quantum objects.

引用

页码：1792 / 1795

页数：4

共 28 条

[1] QUANTUM-WELL LASERS GAIN, SPECTRA, DYNAMICS [J].

ARAKAWA, Y ;

YARIV, A .

IEEE JOURNAL OF QUANTUM ELECTRONICS, 1986, 22 (09) :1887-1899

[2] N-ELECTRON GROUND-STATE ENERGIES OF A QUANTUM-DOT IN MAGNETIC-FIELD [J].

ASHOORI, RC ;

STORMER, HL ;

WEINER, JS ;

PFEIFFER, LN ;

BALDWIN, KW ;

WEST, KW .

PHYSICAL REVIEW LETTERS, 1993, 71 (04) :613-616

[3] Electrons in artificial atoms [J].

Ashoori, RC .

NATURE, 1996, 379 (6564) :413-419

[4] 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

[5] 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

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

CHANG, YC ;

CHANG, LL ;

ESAKI, L .

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

[7] Homogeneous linewidths in the optical spectrum of a single gallium arsenide quantum dot [J].

Gammon, D ;

Snow, ES ;

Shanabrook, BV ;

Katzer, DS ;

Park, D .

SCIENCE, 1996, 273 (5271) :87-90

[8] 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

[9] 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

[10] 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

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