Ultrafast terahertz conductivity in epitaxial graphene nanoribbons: an interplay between photoexcited and secondary hot carriers
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F25%3A00600753" target="_blank" >RIV/68378271:_____/25:00600753 - isvavai.cz</a>
Alternative codes found
RIV/00216208:11320/25:10509087
Result on the web
<a href="https://hdl.handle.net/11104/0358050" target="_blank" >https://hdl.handle.net/11104/0358050</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1088/1361-6463/ad8e71" target="_blank" >10.1088/1361-6463/ad8e71</a>
Alternative languages
Result language
angličtina
Original language name
Ultrafast terahertz conductivity in epitaxial graphene nanoribbons: an interplay between photoexcited and secondary hot carriers
Original language description
Optical pump-terahertz probe spectroscopy was used to investigate ultrafast photo-induced charge carrier transport in graphene nanoribbons upon scaling the optical pump intensity. For low pump fluences, the deposited pump energy is rapidly redistributed through carrier-carrier scattering, producing secondary hot carriers: the picosecond THz photoconductivity then acquires a negative sign and scales linearly with an increasing pump fluence. At higher fluences, there are not enough equilibrium carriers able to accept the deposited energy, directly generated carriers start to contribute significantly to the photoconductivity with a positive sign leading to its saturation. This leads to a non-monotonic variation of the carrier mobility and plasmonic resonance frequency as a function of the pump fluence. In addition, a weak carrier localization observed at low pump fluences is progressively lifted upon increasing the pump fluence as a result of the rise of initial carrier temperature.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10302 - Condensed matter physics (including formerly solid state physics, supercond.)
Result continuities
Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2025
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Journal of Physics D-Applied Physics
ISSN
0022-3727
e-ISSN
1361-6463
Volume of the periodical
58
Issue of the periodical within the volume
4
Country of publishing house
US - UNITED STATES
Number of pages
8
Pages from-to
045307
UT code for WoS article
001353743400001
EID of the result in the Scopus database
2-s2.0-85219424446