Abstract
The absorption of uncoupled and tunnel-coupled vertically correlated quantum dots (QDs), measured at room temperature, has been experimentally compared. It is revealed that matching of the laser wavelength and Stark shift for laser structures with tunnel-coupled QDs leads to resonant absorption with formation of bound and antibound exciton states with a splitting energy of ∼62 meV between them in QD molecules. For these states, an external field causes a large linear Stark shift (up to 68 meV). For uncoupled QDs, one resonant absorption peak with the formation of an exciton (for which the Stark shift does not exceed 13 meV) is observed.
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N. N. Ledentsov, V. A. Shchukin, M. Grundmann, N. Kirstaedter, J. Böhrer, O. Schmidt, D. Bimberg, V. M. Ustinov, A. Yu. Egorov, A. E. Zhukov, P. S. Kop’ev, S. V. Zaitsev, N. Yu. Gordeev, Zh. I. Alferov, A. I. Borovkov, A. O. Kosogov, S. S. Ruvimov, P. Werner, U. Gösele, and J. Heydenrech, Phys. Rev. B 54, 8743 (1996).
M. M. Sobolev, G. É. Tsyrlin, Yu. B. Samsonenko, N. K. Polyakov, A. A. Tonkikh, and Yu. G. Musikhin, Fiz. Tekh. Poluprovodn. 39, 131 (2005) [Semiconductors 39, 119 (2005)].
M. M. Sobolev, A. E. Zhukov, A. P. Vasil’ev, E. S. Semenova, V. S. Mikhrin, G. É. Tsyrlin, and Yu. G. Musikhin, Fiz. Tekh. Poluprovodn. 40, 84 (2006) [Semiconductors 40, 331 (2006)].
V. Aimez, J. Beauvais, J. Beerens, S. L. Ng, and B. S. Ooi, Appl. Phys. Lett. 79, 3582 (2001).
A. Gubenko, D. Livshits, I. Krestnikov, S. Mikhrin, A. Kozhukhov, A. Kovsh, N. Ledentsov, A. Zhukov, and E. Portnoi, Electron. Lett. 41, 1124 (2005).
V. G. Talalaev, B. V. Novikov, A. S. Sokolov, I. V. Shtrom, J. W. Tomm, N. D. Zakharov, P. Werner, G. É. Tsyrlin, and A. A. Tonkikh, Fiz. Tekh. Poluprovodn. 41, 204 (2007) [Semiconductors 41, 197 (2007)].
B. Gerardot, D. Brunner, P. Dalgarno, P. Ohberg, S. Seidl, M. Kroner, K. Karrai, N. Stoltz, P. Petroff, and R. Warburton, Nature 451, 441 (2008).
B. Szafran, E. Barczyk, F. M. Peeters, and S. Bednarek, Phys. Rev. B 77, 115441 (2008).
M. Bayer, P. Hawrylak, K. Hinzer, S. Fafard, M. Korkusinski, Z. R. Wasilewski, O. Stern, and A. Forchel, Science 291, 451 (2001).
G. Ortner, I. Yugova, G. Baldassarri Höger von Högersthal, A. Larionov, H. Kurtze, D. R. Yakovlev, M. Bayer, S. Fafard, Z. Wasilewski, P. Hawrylak, Y. B. Lyanda-Geller, T. L. Reinecke, A. Babinski, M. Potemski, V. B. Timofeev, and A. Forchel, Phys. Rev. B 71, 125335 (2005).
E. L. Portnoi, I. M. Gadzhiev, A. E. Gubenko, M. M. Sobolev, A. R. Kovsh, and I. O. Bakshaev, Pis’ma Zh. Tekh. Fiz. 33(16), 28 (2007) [Tech. Phys. Lett. 33, 686 (2007)].
H. J. Krenner, M. Sabathil, E. C. Clark, A. Kress, D. Schuh, M. Bichler, G. Abstreiter, and J. J. Finley, Phys. Rev. Lett. 94, 057402 (2005).
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Original Russian Text © M.M. Sobolev, I.M. Gadzhiyev, I.O. Bakshaev, V.S. Mikhrin, V.N. Nevedomskiy, M.S. Buyalo, Yu.M. Zadiranov, E.L. Portnoi, 2009, published in Fizika i Tekhnika Poluprovodnikov, 2009, Vol. 43, No. 4, pp. 512–516.
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Sobolev, M.M., Gadzhiyev, I.M., Bakshaev, I.O. et al. Absorption in laser structures with coupled and uncoupled quantum dots in an electric field at room temperature. Semiconductors 43, 490–494 (2009). https://doi.org/10.1134/S1063782609040150
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DOI: https://doi.org/10.1134/S1063782609040150