Hot carrier relaxation in CdTe via phonon-plasmon modes
Carrier and lattice dynamics of laser excited CdTe was studied by time-resolved reflectivity for excitation fluences spanning about three orders of magnitude, from 0.064 to 6.14 mJ cm −2 . At fluences below 1 mJ cm −2 the transient reflectivity is dominated by the dynamics of hybrid phonon-plasmon m...
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| Hauptverfasser: | , |
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| Dokumenttyp: | Article (Journal) |
| Sprache: | Englisch |
| Veröffentlicht: |
23 January 2017
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| In: |
Journal of physics. Condensed matter
Year: 2017, Jahrgang: 29, Heft: 9 |
| ISSN: | 1361-648X |
| DOI: | 10.1088/1361-648X/aa5478 |
| Online-Zugang: | Verlag, Volltext: http://dx.doi.org/10.1088/1361-648X/aa5478 Verlag, Volltext: http://stacks.iop.org/0953-8984/29/i=9/a=095701 
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| Verfasserangaben: | Y. Zhong, D. Ostach, M. Scholz, S.W. Epp, S. Techert, I. Schlichting, J. Ullrich, F.S. Krasniqi |
| Zusammenfassung: | Carrier and lattice dynamics of laser excited CdTe was studied by time-resolved reflectivity for excitation fluences spanning about three orders of magnitude, from 0.064 to 6.14 mJ cm −2 . At fluences below 1 mJ cm −2 the transient reflectivity is dominated by the dynamics of hybrid phonon-plasmon modes. At fluences above 1 mJ cm −2 the time-dependent reflectivity curves show a complex interplay between band-gap renormalization, band filling, carrier dynamics and recombination. A framework that accounts for such complex dynamics is presented and used to model the time-dependent reflectivity data. This model suggests that the excess energy of the laser-excited hot carriers is reduced much more efficiently by emitting hybrid phonon-plasmon modes rather than bare longitudinal optical phonons. |
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| Beschreibung: | Gesehen am 12.09.2018 |
| Beschreibung: | Online Resource |
| ISSN: | 1361-648X |
| DOI: | 10.1088/1361-648X/aa5478 |