Optical properties of CdTe/ZnTe quantum dots sandwiched between two quantum wells with ZnTe separation barriers
- Authors
- Lee, Hong Seok; Park, Hong-lee; Kim, Taewhan
- Issue Date
- Oct-2006
- Publisher
- AMER INST PHYSICS
- Citation
- APPLIED PHYSICS LETTERS, v.89, no.18
- Indexed
- SCIE
SCOPUS
- Journal Title
- APPLIED PHYSICS LETTERS
- Volume
- 89
- Number
- 18
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/180964
- DOI
- 10.1063/1.2385114
- ISSN
- 0003-6951
- Abstract
- Temperature-dependent photoluminescence (PL) measurements were performed to investigate the optical properties of CdTe/ZnTe nanostructures. The activation energy of the CdTe/ZnTe quantum dots (QDs) sandwiched between two quantum wells (QWs) with ZnTe separation barriers, as obtained from the temperature-dependent PL spectra, was much larger than the activation energies of the QDs alone and of the QDs combined with a single QW. This behavior can be attributed to a transfer of carriers from the QWs to the QDs through a separation layer due to a nonresonant multiphonon-assisted tunneling process resulting from carrier thermal emission.
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