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  Hot carrier relaxation in CdTe via phonon–plasmon modes

Zhong, Y. P., Ostach, D., Scholz, M., Epp, S., 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-0000-002D-7632-4 Version Permalink: http://hdl.handle.net/21.11116/0000-0001-EADD-F
Genre: Journal Article

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Zhong_2017_J._Phys.__Condens._Matter_29_095701.pdf (Publisher version), 3MB
 
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https://dx.doi.org/10.1088/1361-648X/aa5478 (Publisher version)
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 Creators:
Zhong, Yin Peng1, 2, 3, Author              
Ostach, D.2, 4, Author
Scholz, M.5, Author
Epp, Sascha1, 2, 4, Author              
Techert, S.5, Author
Schlichting, I2, 3, Author
Ullrich, J.2, 4, Author
Krasniqi, F. S.2, 3, 6, Author
Affiliations:
1Miller Group, Atomically Resolved Dynamics Department, Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society, ou_1938288              
2Max Planck Advanced Study Group at CFEL/DESY, Notkestr. 85, 22607 Hamburg, Germany, ou_persistent22              
3Max-Planck-Institut für medizinische Forschung, Jahnstr. 29, 69120 Heidelberg, Germany, ou_persistent22              
4Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany, ou_persistent22              
5Max-Planck-Institut für biophysikalische Chemie, 37070 Göttingen, Germany, ou_persistent22              
6Physikalisch-Technische Bundesanstalt, Bundesallee 100, 38116 Braunschweig, Germany, ou_persistent22              

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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 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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Language(s): eng - English
 Dates: 2016-12-112016-10-052016-12-192017-01-232017-03-08
 Publication Status: Published in print
 Pages: -
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 Table of Contents: -
 Rev. Method: Peer
 Identifiers: DOI: 10.1088/1361-648X/aa5478
 Degree: -

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Title: Journal of Physics: Condensed Matter
Source Genre: Journal
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Publ. Info: Bristol : IOP Publishing
Pages: - Volume / Issue: 29 (9) Sequence Number: 095701 Start / End Page: - Identifier: ISSN: 0953-8984
CoNE: /journals/resource/954928562478