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Quantum-Confined Stark Effect in Ensemble of Colloidal Semiconductor Quantum Dots.
- Source :
-
Chinese Physics Letters . Dec2010, Vol. 27 Issue 12, p127803-127803. 1p. - Publication Year :
- 2010
-
Abstract
- The presence of a strong, changing, randomly-oriented, local electric field, which is induced by the photo-ionization that occurs universally in colloidal semiconductor quantum dots (QDs), makes it difficult to observe the quantum-confined Stark effect in ensemble of colloidal QDs. We propose a way to inhibit such a random electric field, and a clear quantum-confined Stark shift is observed directly in close-packed colloidal QDs. Besides the applications in optical switches and modulators, our experimental results indicate how the oscillator strengths of the optical transitions are changed under external electric fields. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 0256307X
- Volume :
- 27
- Issue :
- 12
- Database :
- Academic Search Index
- Journal :
- Chinese Physics Letters
- Publication Type :
- Academic Journal
- Accession number :
- 56475527
- Full Text :
- https://doi.org/10.1088/0256-307X/27/12/127803