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- Title
Raman Scattering in Multilayer Structures with CdTe Quantum Dots in ZnTe.
- Authors
Vodop’yanov, L. K.; Vinogradov, V. S.; Mel’nik, N. N.; Karczewski, G.
- Abstract
Raman spectra in superlattices composed of layers of self-assembled CdTe quantum dots separated by ZnTe barriers are investigated. As the barrier thickness increases, a high-frequency shift of all peaks is observed, which is explained by a decrease in the lattice constant averaged over the volume of the entire structure. Peaks are found at a CdTe TO mode frequency of 140cm[sup –1] and also at 120cm[sup –1]. The first peak is assigned to the symmetric Coulomb (interface) mode of the quantum dot material, and the low-frequency peak is assigned to the symmetric mode of the phonons captured in the quantum dot. This combination of modes in structures with quantum dots has not been observed previously. © 2003 MAIK “Nauka / Interperiodica”.
- Subjects
RAMAN effect; QUANTUM dots; CADMIUM compounds; SUPERLATTICES
- Publication
JETP Letters, 2003, Vol 77, Issue 3, p143
- ISSN
0021-3640
- Publication type
Article
- DOI
10.1134/1.1567777