[1] Knill E, Laflamme R and Milburn G J 2001 Nature
409 46

[2] Daniel L and David P D 1998 Phys. Rev. A 57
120

[3] Ulrich S M, Benyoucef M et al 2005 Phys. Rev. B
71 235328

[4] Peng J, Ye X L and Wang Z G 2005 Nanotechnology
16 2775

[5] Stevenson R M, Thompson R M, Shields A J, Farrer I,
Kardynal B E, Ritchie D A and Pepper M 2002 Phys. Rev. B
66 081302

[6] Arno H, Yann D, Eli K, Ulrich and Elisa M 2000 Phys.
Rev. Lett. 84 5648

[7] Ward M B, Unitt D C, Yuan Z Y, See P, Stevenson R M,
Cooper K et al 2004 Physica E 21 390

[8] Finley J J, Ashmore A D, Lema\^re A, Mowbray D J,
Itskevich I E, Maksym P A, Hopkinson M and Krauss T F 2001
Phys. Rev. B 63 073307

[9] Huang S S, Niu Z C, Ni H Q et al 2007 J. Cryst.
Growth 301--302 751

[10] Moskalenko E S, Karlsson K F, Holtz P O, Monemar B,
Schoenfeld W V, Garcia J M and Petroff P M 2002 Phys. Rev. B
66 195332

[11] Nakata Y, Mukai K, Sugawara M et al 2001 J. Cryst.
Growth 208 93

[12] Bayer M and Forchel A 2002 Phys. Rev. B 65
041308

[13] Regelman D V, Dekel E, Gershoni D, Ehrenfreund E,
Williamson A J, Shumway J, Zunger A, Schoenfeld W V and Petroff P M
2001 Phys. Rev. B 64 165301

[14] Besombes L and Kheng K 2001 Phys. Rev. B 63
155307

[15] Akimov A, Hundt A, Flissikowski F and Henneberger F 2002
Appl. Phys. Lett. 81 4730

[16] Baier M H, Malko A, Pelucchi E, Oberli D Y and Kapon E
2006 Phys. Rev. B 73 205321

[17] Xiong Y H, Niu Z C, Dou X M, Sun B Q, Huang S S, Ni H Q,
Du Y and Xia J B 2009 Chin. Phys. Lett. 26 026802

[18] Dou X M, Sun B Q, Xiong Y H, Huang S S, Ni H Q and Niu Z
C 2008 Chin. Phys. Lett. 25 3440