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  Hot carrier relaxation in CdTe via phonon-plasmon modes.

Zhong, Y., Ostach, D., Scholz, M., Epp, S. W., Techert, S., Schlichting, I., et al. (2017). Hot carrier relaxation in CdTe via phonon-plasmon modes. Journal of Physics: Condensed Matter, 29(9): 095701. doi:10.1088/1361-648X/aa5478.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-002C-3DB9-C Version Permalink: http://hdl.handle.net/11858/00-001M-0000-002C-649A-E
Genre: Journal Article

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2382551.pdf (Publisher version), 3MB
 
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 Creators:
Zhong, Y., Author
Ostach, D., Author
Scholz, M., Author
Epp, S. W., Author
Techert, S.1, Author              
Schlichting, I., Author
Ullrich, J., Author
Krasniqi, F. S., Author
Affiliations:
1Research Group of Structural Dynamics of (Bio)Chemical Systems, MPI for biophysical chemistry, Max Planck Society, ou_578564              

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Free keywords: phonons; plasmons; ultrafast phenomena
 Abstract: 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/cm2. At fluences below 1 mJ/cm2 the transient reflectivity is dominated by the dynamics of hybrid phonon-plasmon modes. At fluences above 1 mJ/cm2 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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Language(s): eng - English
 Dates: 2017-01-232017-03-08
 Publication Status: Published in print
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 Rev. Method: Peer
 Identifiers: DOI: 10.1088/1361-648X/aa5478
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Title: Journal of Physics: Condensed Matter
Source Genre: Journal
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Pages: 12 Volume / Issue: 29 (9) Sequence Number: 095701 Start / End Page: - Identifier: -