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Size-dependent exciton spin relaxation dynamics in CdTe colloidal quantum dots is studied at room temperature with the cross-polarized heterodyne third-order nonlinear transient grating technique The CdTe exciton spin relaxation reveals a mono-exponential decay behavior with a time constant of 0.1-0.5 ps when the pump-probe photon energy is tuned to be in resonance with the lowest exciton absorption transition (1Se-1Sh). The exciton spin relaxation in quantum dot is mainly governed by the hole spin flip process and ascribed to the transitions between bright-dark exciton fine structure states, i.e. J= 1+2. This finding suggests that the exciton spin relaxation rate in CdTe quantum dot is inversely proportional to the fourth power of quantum dot size.
[1] Gupta J A, Knobel R, Samarth N, Awschalom D D 2001 Science 292 2458
[2] Ouyang M, Dabid D, Awschalom D D 2003 Science 301 1074
[3] Ramsay A J 2010 Semi. Sci. Technol. 25 103001
[4] Tong H, Wu M W 2011 Phys. Rev. B 83 235323
[5] Ma S S, Dou X M, Chang X Y, Sun B Q, Xiong Y H, Niu Z C, Ni H Q 2009 Chin. Phys. Lett. 26 117201
[6] Gupta J A, Awschalom D D, Peng X, Alivisatos A P 1999 Phys. Rev. B 59 R10421
[7] Tartakovskii A I, Cahill J, Makhonin M N, Whittaker D M, Wells J P R, Fox A M, Mowbray D J, Skolnick M S, Groom K M, Steer M J, Hopkinson M 2004 Phys. Rev. Lett. 93 057401
[8] Nair P S, Fritz K P, Scholes G D 2004 Chem. Comm. 18 2084
[9] Yu W W, Qu L H, Guo W Z, Peng X G 2003 Chem. Mater. 15 2854
[10] Zhong H Z, Nagy M, Jones M, Scholes G D 2009 J. Phys. Chem. C 113 10465
[11] An L M, Yang Y Q, Song W S, Su W H, Zeng Q H, Chao K F, Kong X G 2009 Acta Phys. Sin. 58 7914 (in Chinese) [安利民, 杨延强, 宋维斯, 苏文辉, 曾庆辉, 朝克夫, 孔祥贵 2009 物理学报 58 7914]
[12] Gerardot B D, Brunner D, Dalgarno P A, Ohberg P, Seidl S, Kroner M, Karrai K, Stoltz N G, Petroff P M, Warburton R J 2008 Nature 451 441
[13] Brunner D, Gerardot B D, Dalgarno P A, Wust G, Laraai K, Stoltz N G, Petroff P M, Warburton R J 2009 Science 325 70
[14] Scholes G D, Kim J, Wong C Y 2006 Phys. Rev. B 73 195325
[15] Huxter V M, Kim J, Lo S S, Lee A, Nair P S, Scholes G D 2010 Chem. Phys. Lett. 491 187
[16] Kim J, Wong C Y, Nair P S, Fritz K P, Kumar S, Scholes G D 2006 J. Phys. Chem. B 110 25371
[17] Scholes G D, Kim J, Wong C Y, Huxter V M, Nair P S, Fritz K P, Kumar S 2006 Nano Lett. 6 1765
[18] He J, Zhong H Z, Scholes G D 2010 Phys. Rev. Lett. 105 046601
[19] He J, Lo S S, Kim J, Scholes G D 2008 Nano Lett. 8 4007
[20] Wong C Y, Kim J, Nair P S, Nagy M C, Scholes G D 2009 J. Phys. Chem. C 113 795
[21] Brus L E 1984 J. Chem. Phys. 80 4403
[22] Efros A L, Rosen M, Kuno M, Nirmal M, Norris D J 1996 Phys. Rev. B 54 4843
[23] Nahalkova P, Sprinzl D, Maly P, Nemec P, Gladilin V N, Devreese J T 2007 Phys. Rev. B 75 113306
[24] Pikus G E, Bir G L 1971 Sov. Phys. JEPT 33 108
[25] Vinattieri A, Shah J, Damen T C, Kim D S, Pfeiffer L N, Maialle M Z, Sham L J 1994 Phys. Rev. B 50 10868
[26] Ma H, Jin Z, Zhang Z, Li G, Ma G 2012 J. Phys. Chem. A 116 2018
[27] He J, Ji W, Ma G H, Tang S H, Elim H L, Sun W X, Zhang Z H, Chin W S 2004 J. Appl. Phys. 95 6381
[28] Viswanatha R, Sapra S, Saha-Dasgupta T, Sarma D D 2005 Phys. Rev. B 72 045333
[29] Atature M, Dreiser J, Badolato A, Hogele A, Karrai K, Imamoglu A 2006 Science 312 551
[30] Gupta J A, Awschalom D D, Efros A L, Rodina A V 2002 Phys. Rev. B 66 125307
[31] Gundogdu K, Hall K C, Koerperick E J, Pryor C E, Flatté M E, Boggess T F 2005 Appl. Phys. Lett. 86 113111
[32] Hall K C, Koerperick E J, Boggess T F, Shchekin O B 2007 Appl. Phys. Lett. 90 053109
[33] Fischer J, Loss D 2009 Science 324 1277
[34] Kolodrubetz M H, Petta J R 2009 Science 325 42
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[1] Gupta J A, Knobel R, Samarth N, Awschalom D D 2001 Science 292 2458
[2] Ouyang M, Dabid D, Awschalom D D 2003 Science 301 1074
[3] Ramsay A J 2010 Semi. Sci. Technol. 25 103001
[4] Tong H, Wu M W 2011 Phys. Rev. B 83 235323
[5] Ma S S, Dou X M, Chang X Y, Sun B Q, Xiong Y H, Niu Z C, Ni H Q 2009 Chin. Phys. Lett. 26 117201
[6] Gupta J A, Awschalom D D, Peng X, Alivisatos A P 1999 Phys. Rev. B 59 R10421
[7] Tartakovskii A I, Cahill J, Makhonin M N, Whittaker D M, Wells J P R, Fox A M, Mowbray D J, Skolnick M S, Groom K M, Steer M J, Hopkinson M 2004 Phys. Rev. Lett. 93 057401
[8] Nair P S, Fritz K P, Scholes G D 2004 Chem. Comm. 18 2084
[9] Yu W W, Qu L H, Guo W Z, Peng X G 2003 Chem. Mater. 15 2854
[10] Zhong H Z, Nagy M, Jones M, Scholes G D 2009 J. Phys. Chem. C 113 10465
[11] An L M, Yang Y Q, Song W S, Su W H, Zeng Q H, Chao K F, Kong X G 2009 Acta Phys. Sin. 58 7914 (in Chinese) [安利民, 杨延强, 宋维斯, 苏文辉, 曾庆辉, 朝克夫, 孔祥贵 2009 物理学报 58 7914]
[12] Gerardot B D, Brunner D, Dalgarno P A, Ohberg P, Seidl S, Kroner M, Karrai K, Stoltz N G, Petroff P M, Warburton R J 2008 Nature 451 441
[13] Brunner D, Gerardot B D, Dalgarno P A, Wust G, Laraai K, Stoltz N G, Petroff P M, Warburton R J 2009 Science 325 70
[14] Scholes G D, Kim J, Wong C Y 2006 Phys. Rev. B 73 195325
[15] Huxter V M, Kim J, Lo S S, Lee A, Nair P S, Scholes G D 2010 Chem. Phys. Lett. 491 187
[16] Kim J, Wong C Y, Nair P S, Fritz K P, Kumar S, Scholes G D 2006 J. Phys. Chem. B 110 25371
[17] Scholes G D, Kim J, Wong C Y, Huxter V M, Nair P S, Fritz K P, Kumar S 2006 Nano Lett. 6 1765
[18] He J, Zhong H Z, Scholes G D 2010 Phys. Rev. Lett. 105 046601
[19] He J, Lo S S, Kim J, Scholes G D 2008 Nano Lett. 8 4007
[20] Wong C Y, Kim J, Nair P S, Nagy M C, Scholes G D 2009 J. Phys. Chem. C 113 795
[21] Brus L E 1984 J. Chem. Phys. 80 4403
[22] Efros A L, Rosen M, Kuno M, Nirmal M, Norris D J 1996 Phys. Rev. B 54 4843
[23] Nahalkova P, Sprinzl D, Maly P, Nemec P, Gladilin V N, Devreese J T 2007 Phys. Rev. B 75 113306
[24] Pikus G E, Bir G L 1971 Sov. Phys. JEPT 33 108
[25] Vinattieri A, Shah J, Damen T C, Kim D S, Pfeiffer L N, Maialle M Z, Sham L J 1994 Phys. Rev. B 50 10868
[26] Ma H, Jin Z, Zhang Z, Li G, Ma G 2012 J. Phys. Chem. A 116 2018
[27] He J, Ji W, Ma G H, Tang S H, Elim H L, Sun W X, Zhang Z H, Chin W S 2004 J. Appl. Phys. 95 6381
[28] Viswanatha R, Sapra S, Saha-Dasgupta T, Sarma D D 2005 Phys. Rev. B 72 045333
[29] Atature M, Dreiser J, Badolato A, Hogele A, Karrai K, Imamoglu A 2006 Science 312 551
[30] Gupta J A, Awschalom D D, Efros A L, Rodina A V 2002 Phys. Rev. B 66 125307
[31] Gundogdu K, Hall K C, Koerperick E J, Pryor C E, Flatté M E, Boggess T F 2005 Appl. Phys. Lett. 86 113111
[32] Hall K C, Koerperick E J, Boggess T F, Shchekin O B 2007 Appl. Phys. Lett. 90 053109
[33] Fischer J, Loss D 2009 Science 324 1277
[34] Kolodrubetz M H, Petta J R 2009 Science 325 42
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