Resonant Raman Spectra of CdTe/ZnTe Self Assembled Quantum Dots

• Authors: N. Romčević , M. Romčević , R. Kostić , D. Stojanović , B. Abolmasov , G. Karczewski , R. Galazka
• Languages of publication: EN

Abstracts

EN

In this paper we present Raman scattering and photoluminescence spectra measured on CdTe/ZnTe self assembled quantum dots. The photoluminescence spectrum has shown two main emission peaks, both connected with existing of quantum dots. One presents direct deexcitation to ground state and the other is optical phonon (οmega = 207.3 cm^{-1})-assisted deexcitation. The registered multiphonon emission process depends on temperature. At low temperature phonon spectra shows line at 450 cm^{-1} (TA + 2LO in ZnTe) and 595 cm^{-1} (2LO + TO(Γ) in ZnTe).

Keywords

EN

63.22.-m; 78.30.Fs; 78.55.Et

Discipline

• 78.55.Et: II-VI semiconductors
• 63.22.-m: Phonons or vibrational states in low-dimensional structures and nanoscale materials
• 78.30.Fs: III-V and II-VI semiconductors

• Journal: Acta Physica Polonica A
• Year: 2009
• Volume: 116
• Issue: 1
• Pages: 88-90

Dates

published

2009-07

Contributors

author

N. Romčević

• Institute of Physics, Pregrevica 118, 11080 Belgrade, Serbia

author

M. Romčević

• Institute of Physics, Pregrevica 118, 11080 Belgrade, Serbia

author

R. Kostić

• Institute of Physics, Pregrevica 118, 11080 Belgrade, Serbia

author

D. Stojanović

• Institute of Physics, Pregrevica 118, 11080 Belgrade, Serbia

author

B. Abolmasov

• Faculty of Mining and Geology, P.O. Box 162, 11000 Belgrade, Serbia

author

G. Karczewski

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

author

R. Galazka

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

References

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• 3. A.A. Arora, M. Rajalakshmi, T.R. Ravindran, V. Sivasubramanian, J. Raman Spectrosc. 38, 604 (2007)
• 4. M. Tkach, V. Holovatsky, O. Voitsekhivska, M. Mikhalyova, Phys. Status Solidi B 203, 373 (1997)
• 5. S.L. Zhang, Y.T. Hou, M.Y. Shen, J. Li, S.X. Yuan, Phys. Rev. B 47, 12937 (1993)

Identifiers

DOI

10.12693/APhysPolA.116.88