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Ultrafast dynamics of inter- and intraband transitions in semiconductor nanocrystals: Implications for quantum-dot lasers
Abstract
Application of femtosecond transient absorption in the visible and near-IR spectral ranges and time-resolved photoluminescence allows us to separate electron and hole relaxation paths and to map the structure of interband and intraband optical transitions in CdSe and CdS nanocrystals (NC's) with a wide range of surface properties. In contrast to electron relaxation, which is controlled by NC surface passivation, depopulation of hole quantized states is extremely fast (sub-ps-to-ps time scales) in all types samples, independent of NC surface treatment (including NC's overcoated with a ZnS layer). Our results suggest that ultrafast hole dynamics are not due to trapping at localized surface defects such as a vacancy, but rather arise from relaxation into intrinsic NC states or intrinsically unpassivated interface states.
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Cited by
Chemistry and Properties of Nanocrystals of Different Shapes
Burda, C., Chen, X., Narayanan, R., & El-Sayed, M. A. (2005) · Chemical Reviews · doi:10.1021/cr030063a · Cited by 7,230
Optical Gain and Stimulated Emission in Nanocrystal Quantum Dots
Klimov, V. I., Mikhailovsky, A. A., Xu, S., Malko, A., Hollingsworth, J. A., Leatherdale, C. A., Eisler, H.-J., & Bawendi, M. G. (2000) · Science · doi:10.1126/science.290.5490.314 · Cited by 2,825
Self-citationAll-optical modulation by plasmonic excitation of CdSe quantum dots
Pacifici, D., Lezec, H. J., & Atwater, H. A. (2007) · Nature Photonics · doi:10.1038/nphoton.2007.95 · Cited by 559
Algar, W. R., Tavares, A. J., & Krull, U. J. (2010) · Analytica Chimica Acta · doi:10.1016/j.aca.2010.05.026 · Cited by 511
Quantum confined colloidal nanorod heterostructures for solar-to-fuel conversion
Wu, K., & Lian, T. (2016) · Chemical Society Reviews · doi:10.1039/c5cs00472a · Cited by 305
Metadata
- Authors
- Klimov, V. I., Schwarz, C. J., McBranch, D. W., Leatherdale, C. A., & Bawendi, M. G.
- Venue
- Physical Review B
- Publisher
- American Physical Society (APS)
- Published
- 1999-07-15
- Volume
- 60
- Issue
- 4
- Pages
- R2177-R2180
- ISSN
- 0163-1829 (ISSN-L)
- 1095-3795
- OpenAlex
- W1998682694
- Cited by
- 236
- References
- 0
- FWCI
- 10.86
- Type
- journal article
- Language
- en
- Open access
- closed
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- Klimov, V. I., Schwarz, C. J., McBranch, D. W., Leatherdale, C. A., & Bawendi, M. G. (1999). Ultrafast dynamics of inter- and intraband transitions in semiconductor nanocrystals: Implications for quantum-dot lasers. Physical Review B. https://doi.org/10.1103/physrevb.60.r2177
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Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).
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