Spectroscopy of Indirect Excitons in Vertically Stacked CdTe Quantum Dot Structures

• Authors: K. Kukliński , Ł. Kłopotowski , K. Fronc , P. Wojnar , T. Wojciechowski , M. Czapkiewicz , J. Kossut , G. Karczewski , T. Wojtowicz
• Languages of publication: EN

Abstracts

EN

We show that by means of an electric field we can tune the energy levels in vertical quantum dot pairs and study transitions related to recombination of direct and indirect excitons. With decreasing the reverse bias, we observe both the blue- and red-shifted indirect exciton transitions. Based on the band profile of our device, we conclude that the former corresponds to the recombination of the electron and hole localized in the top and the bottom dot, respectively and the latter is related to the recombination of the electron and hole localized in the bottom and the top dot, respectively.

Keywords

EN

71.55.Gs; 78.67.Hc; 32.60.+i

Discipline

• 32.60.+i: Zeeman and Stark effects
• 78.67.Hc: Quantum dots
• 71.55.Gs: II-VI semiconductors

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2011
• Volume: 120
• Issue: 5
• Pages: 856-858

Dates

published

2011-11

Contributors

author

K. Kukliński

• Institute of Physics, Polish Academy of Sciences, al. Lotników 32/46, 02-668 Warsaw, Poland

author

Ł. Kłopotowski

• Institute of Physics, Polish Academy of Sciences, al. Lotników 32/46, 02-668 Warsaw, Poland

author

K. Fronc

• Institute of Physics, Polish Academy of Sciences, al. Lotników 32/46, 02-668 Warsaw, Poland

author

P. Wojnar

• Institute of Physics, Polish Academy of Sciences, al. Lotników 32/46, 02-668 Warsaw, Poland

author

T. Wojciechowski

• Institute of Physics, Polish Academy of Sciences, al. Lotników 32/46, 02-668 Warsaw, Poland

author

M. Czapkiewicz

• Institute of Physics, Polish Academy of Sciences, al. Lotników 32/46, 02-668 Warsaw, Poland

author

J. Kossut

• Institute of Physics, Polish Academy of Sciences, al. Lotników 32/46, 02-668 Warsaw, Poland

author

G. Karczewski

• Institute of Physics, Polish Academy of Sciences, al. Lotników 32/46, 02-668 Warsaw, Poland

author

T. Wojtowicz

• Institute of Physics, Polish Academy of Sciences, al. Lotników 32/46, 02-668 Warsaw, Poland

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Identifiers

DOI

10.12693/APhysPolA.120.856