Fine structure of excitons in InAs/GaAs coupled quantum dots: A sensitive test of electronic coupling

Physical Review Letters

Volumn 90, Issue 8, 2003, Pages

  Ortner, G ^a,b   Bayer, M ^a,b   Larionov, A ^a,b   Timofeev, V B ^b   Forchel, A ^b   Lyanda Geller, Y B ^c   Reinecke, T L ^c   Hawrylak, P ^d   Fafard, S ^d   Wasilewski, Z ^d  

^a TU DORTMUND UNIVERSITY   (Germany)

^b UNIVERSITY OF WÜRZBURG   (Germany)

^c NAVAL RESEARCH LABORATORY   (United States)

^d NATIONAL RESEARCH COUNCIL CANADA   (Canada)

Author keywords

[No Author keywords available]

Indexed keywords

BAND STRUCTURE; EMISSION SPECTROSCOPY; EXCITONS; HAMILTONIANS; MAGNETIC FIELD EFFECTS; MOLECULAR BEAM EPITAXY; MOLECULAR DYNAMICS; NUMERICAL ANALYSIS; QUANTUM THEORY; SEMICONDUCTING GALLIUM ARSENIDE; SEMICONDUCTING INDIUM COMPOUNDS;

CONDUCTION BAND; INDIUM ARSENIDE; MAGNETO-OPTICAL SPECTROSCOPY; PHOTOLUMINESCENCE SPECTROSCOPY; VALENCE BAND;

SEMICONDUCTOR QUANTUM DOTS;

EID: 0037471061     PISSN: 00319007     EISSN: None     Source Type: Journal    
DOI: None     Document Type: Article

References (23)

1. D. Gammon et al., Phys. Rev. Lett. 76, 3005 (1996)
2. M. Bayer et al., Phys. Rev. Lett. 82, 1748 (1999).
3. The Physics of Quantum Information, D. Bouwmeester, A. Ekert, and A. Zeilinger (Springer, Berlin, 2000).
4. G. Chen et al., Science 289, 1906 (2000)
5. P.C. Chen et al., Phys. Rev. Lett. 87, 067401 (2001).
6. R.H. Blick et al., Phys. Rev. Lett. 80, 4032 (1998)
7. T. Fujisawa et al., Science 282, 932 (1998)
8. T. Oosterkamp et al., Nature (London) 395, 873 (1998)
9. G. Schedelbeck et al., Science 278, 1792 (1997).
10. M. Bayer et al., Science 291, 451 (2001).
11. By coherent coupling we mean quantum mechanical coupling between states of the two QDs for which the resulting splittings are greater than broadening due to dephasing.
12. S. Fafard et al., Appl. Phys. Lett. 76, 2268 (2000).
13. A. Kuther et al., Phys. Rev. B 58, R7508 (1998).
14. E.L. Ivchenko and G.E. Pikus, Superlattices and Other Heterostructures (Springer, New York, 1997).
15. G.E. Pikus and A.N. Titkov, in Optical Orientation, F. Meier and B.P. Zakharchenya (North-Holland, New York, 1984).
16. M. Bayer et al., Phys. Rev. B 61, 7273 (2000).
17. Further details are given in Y.B. Lyanda-Geller and T.L. Reinecke (unpublished).
18. M. Korkusinski and P. Hawrylak, Phys. Rev. B 63, 5311 (2001).
19. Other theoretical work on QDMs can be found in G.W. Bryant, Phys. Rev. B 48, 8024 (1993)
20. L.R.C. Fonseca et al., Phys. Rev. B 58, 9955 (1998).
21. g of GaAs is 1.510 eV. The potential offsets between InAs and GaAs are 600 meV for electrons and 120 meV for holes [16]. Because the parabolic potential does not represent the diagmagnetic shift quantitatively, we choose the overall ratio of exciton diamagnetic shift to spin splitting to be comparable to that in the experiment in Fig. 2.
22. C. Pryor, Phys. Rev. Lett. 80, 3579 (1998).
23. To simplify, we ignore the small exchange splittings at B = 0.