Strain distributions and interband transitions of CdxZn1-xTe/ZnTe asymmetric double quantum dots with different degree of coupling
- Authors
- You, Joo Hyung; Woo, Jun Taek; Kim, Tae Whan; Yoo, Keon Ho; Lee, Hong Seok; Park, Hong Lee
- Issue Date
- Dec-2009
- Publisher
- AIP Publishing
- Keywords
- cadmium compounds; conduction bands; finite difference methods; ground states; II-VI semiconductors; semiconductor quantum dots; wave functions; wide band gap semiconductors; zinc compounds
- Citation
- JOURNAL OF APPLIED PHYSICS, v.106, no.11, pp.1 - 4
- Indexed
- SCIE
SCOPUS
- Journal Title
- JOURNAL OF APPLIED PHYSICS
- Volume
- 106
- Number
- 11
- Start Page
- 1
- End Page
- 4
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/175767
- DOI
- 10.1063/1.3267161
- ISSN
- 0021-8979
- Abstract
- Strain distributions and interband transitions of CdxZn1-xTe/ZnTe asymmetric double quantum dots (DQDs) with different degree of coupling were calculated by using a three-dimensional finite difference method (FDM) taking into account strain and nonparabolicity effects. Bird's-eye views of the truncated contour plots of the ground state wave functions at the conduction band of the Cd0.6Zn0.4Te/ZnTe DQDs showed the transition behavior from the coupling to the decoupling behaviors with increasing ZnTe spacer layer thickness. The interband transition energies from the ground electronic subband to the ground heavy-hole band (E-1-HH1) in the CdxZn1-xTe/ZnTe DQDs, as determined from the FDM calculations, were in reasonable agreement with the experimental peaks of the temperature-dependent photoluminescence spectra corresponding to the (E-1-HH1) interband transition energies in the temperature range from 32 to 130 K.
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