Phonon relaxation in CdSSe semiconductor quantum dots studied by femtosecond time-resolved resonant four-wave mixing spectroscopy

Waltner, P.; Materny, Arnulf; Kiefer, W.

doi:10.1016/s0022-0248(00)00296-7

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Time-resolved Methods1

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2006

2022

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Cited by 2 publications

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“…Reports on the application of CARS on semiconductor nanocrystals are scarce. Waltner et al have observed a strongly reduced dephasing time of 0.9 ps in CdSe x S 1−x embedded in a glass matrix at T < 10 K, compared to bulk semiconductores (5-9 ps) [62]. This was attributed to energy dissipation to either the particle surface or the surrounding matrix.…”

Section: Time-resolved Methodsmentioning

confidence: 99%

Raman spectroscopy of colloidal semiconductor nanocrystals

Boldt

2022

Nano Futures

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Raman spectroscopy is a powerful method that gives insight into the atomic structure and composition of nanomaterials, but also allows to draw conclusions about their electronic properties. It is based on the inelastic scattering of light, which is able to excite phonons in the material. In the field of semiconductor nanocrystals, Raman spectroscopy has been employed to make significant contributions to the analysis of lattice distortion, interfaces, phase mixing, and defect formation. Yet, there is no clear consensus on how the electronic and crystal structure of the material interacts with the incident light to yield the observed spectra. This review gives a brief overview over the method. It then reviews the most important findings, current developments, and discusses the efforts to formulate a consistent model that allows to establish the method as a tool for structural analysis.

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Section: Time-resolved Methodsmentioning

confidence: 99%