Abstract The exciton Stark shift and polarization in hemispherical quantum dots (HQDs) each as a function of strength and orientation of applied electric field are theoretically investigated by an exact diagonalization method. A highly anisotropic Stark redshift of exciton energy is found. As the electric field is rotated from Voigt to Faraday geometry, the redshift of exciton energy monotonically decreases. This is because the asymmetric geometric shape of the hemispherical quantum dot restrains the displacement of the wave function to the higher orbital state in response to electric field along Faraday geometry. A redshift of hole energy is found all the time while a transition of electron energy from this redshift to a blueshift is found as the field is rotated from Voigt to Faraday geometry. Taking advantage of the diminishing of Stark effect along Faraday geometry, the hemispherical shapes can be used to improve significantly the radiative recombination efficiency of the polar optoelectronic devices if the strong internal polarized electric field is along Faraday geometry.
Shu-Dong Wu(吴曙东) Anisotropic exciton Stark shift in hemispherical quantum dots 2021 Chin. Phys. B 30 053201
[1] Miyata N, Watanabe H and Ichikawa M 2000 Appl. Phys. Lett.77 1620 [2] Rodríguez A H, Trallero-Giner C, Ulloa S E and Marín-Antuña J 2001 Phys. Rev. B63 125319 [3] Akazawa H 2003 Appl. Phys. Lett.82 1464 [4] Haase J, Shinohara S, Mundra P, Risse G, Lyssenko V G, Fröb H, Hentschel M, Eychmüller A and Leo K 2010 Appl. Phys. Lett.97 211101 [5] Li K H, Feng C and Choi H W 2014 Appl. Phys. Lett.104 051107 [6] Mano T, Watanabe K, Tsukamoto S and Koguchi N 2000 Appl. Phys. Lett.76 3543 [7] Kolobov A V, Shklyaev A A, Oyanagi H, Fons P, Yamasaki S and Ichikawa M 2001 Appl. Phys. Lett.78 2563 [8] Prado S J, Trallero-Giner C, Alcalde A M, López-Richard V and Marques G E 2004 Phys. Rev. B69 201310 [9] Bondarenko V and Zhao Y 2006 Phys. Rev. B73 035335 [10] Li S, Shi L and Yan Z W 2020 Chin. Phys. B29 097802 [11] Tanriseven S, Maaskant P and Corbett B 2008 Appl. Phys. Lett.92 123501 [12] Li J, Yu H, Li Y, Wang F, Yang M and Wong S M 2011 Appl. Phys. Lett.98 021905 [13] Lysak V V, Kang J H and Hong C H 2013 Appl. Phys. Lett.102 061114 [14] Park W Y, Kwon Y, Cheong H W, Lee C and Whang K W 2016 J. Appl. Phys.119 095502 [15] Anderson M A, Gorer S and Penner R M 1997 J. Phys. Chem. B101 5895 [16] Leonard D, Pond K and Petroff P M 1994 Phys. Rev. B50 11687 [17] Zhang Y, Feng C, Wang T and Choi H W 2016 Appl. Phys. Lett.108 031110 [18] Miller D A B, Chemla D S, Damen T C, Gossard A C, Wiegmann W, Wood T. H and Burrus C A 1984 Phys. Rev. Lett.53 2173 [19] Fröhlich D, Wille R, Schlapp W and Weimann G 1987 Phys. Rev. Lett.59 1748 [20] Yang X C and Xing Y 2020 Chin. Phys. B29 087802 [21] Li X C, Ye C B, Gao J and Wang B 2020 Chin. Phys. B29 087302 [22] Pedersen T G 2019 Phys. Rev. A99 063410 [23] Tsai W C, Chen Y T, Lin C H, Hsu W T, Hsu Y S, Chen L C, Chen K H and Chang W H 2013 Phys. Rev. B88 155323 [24] Shirasaki Y, Supran G J, Tisdale W A and Bulović V 2013 Phys. Rev. Lett.110 217403 [25] Xu H and Lai Y C 2015 Phys. Rev. B92 195120 [26] Pedersen T G 2016 Phys. Rev. B94 125424 [27] Scharf B, Frank T, Gmitra M, Fabian J, Žutić I and Perebeinos V 2016 Phys. Rev. B94 245434 [28] Zahra H, Elmaghroui D, Fezai I and Jaziri S 2016 J. Appl. Phys.120 205702 [29] Shevlyagin A V, Goroshko D L, Chusovitin E A and Galkin N G 2016 Appl. Phys. Lett.109 171101 [30] Pedersen T G 2019 Phys. Rev. B100 155410 [31] Krüger S O, Stolz H and Scheel S 2020 Phys. Rev. B101 235204 [32] Kamban H C, Pedersen T G and Peres N M R 2020 Phys. Rev. B102 115305 [33] Henriques J C G, Kamban H C, Pedersen T G and Peres N M R 2020 Phys. Rev. B102 035402 [34] Wang S Y, Kawakami Y, Simpson J, Stewart H, Prior K A and Cavenett B C 1993 Appl. Phys. Lett.62 1715 [35] Thoma J, Liang B, Reyner C, Ochalski T, Williams D, Hegarty S P, Huffaker D and Huyet G 2013 Appl. Phys. Lett.102 013120 [36] Zhu S, Lin S, Li J, Yu Z, Cao H, Yang C, Li J and Zhao L 2017 Appl. Phys. Lett.111 171105 [37] Li C F, Shi K J, Xu M S, Xu X G and Ji Z W 2019 Chin. Phys. B28 107803 [38] Chen P, Zhao D G, Jiang D S, Yang J, Zhu J J, Liu Z S, Liu W, Liang F, Liu S T, Xing Y and Zhang L Q 2020 Chin. Phys. B29 034206 [39] Oukerroum A, Feddi E, Bailach J B, Martínez-Pastor J, Dujardin F and Assaid E 2010 J. Phys.: Condens. Matter22 375301 [40] Gross E F, Zakharchenya B P and Kanskaya L M 1961 Soviet Phys. Solid State3 706 [41] Dow J D and Redfield D 1970 Phys. Rev. B1 3358 [42] Chaves A, Low T, Avouris P, Çakir D and Peeters F M 2015 Phys. Rev. B91 155311 [43] Brunne D, Lafrentz M, Pavlov V V, Pisarev R V, Rodina A V, Yakovlev D R and Bayer M 2015 Phys. Rev. B92 085202
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