Coherent acoustic phonon oscillations and transient critical point parameters of Ge from femtosecond pump–probe ellipsometry
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F22%3A00560870" target="_blank" >RIV/68378271:_____/22:00560870 - isvavai.cz</a>
Alternative codes found
RIV/00216224:14310/22:00126069
Result on the web
<a href="https://doi.org/10.1002/pssr.202200058" target="_blank" >https://doi.org/10.1002/pssr.202200058</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1002/pssr.202200058" target="_blank" >10.1002/pssr.202200058</a>
Alternative languages
Result language
angličtina
Original language name
Coherent acoustic phonon oscillations and transient critical point parameters of Ge from femtosecond pump–probe ellipsometry
Original language description
Herein, the complex pseudodielectric function of Ge and Si from femtosecond pump–probe spectroscopic ellipsometry with 267, 400, and 800 nm pump–pulse wavelengths is analyzed by fitting analytical lineshapes to the second derivatives of the pseudodielectric function with respect to energy. This yields the critical point parameters (threshold energy, lifetime broadening, amplitude, and excitonic phase angle) of E1 and E1+Δ1 in Ge and E1 in Si as functions of delay time. Coherent longitudinal acoustic phonon oscillations with a period of about 11 ps are observed in the transient critical point parameters of Ge. From the amplitude of these oscillations, the laser-induced strain is found to be on the order of 0.03% for Ge measured with the 800 nm pump pulse, which is in reasonable agreement with the strain calculated from theory.
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
2022
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Physica Status Solidi
ISSN
1862-6254
e-ISSN
1862-6270
Volume of the periodical
16
Issue of the periodical within the volume
7
Country of publishing house
DE - GERMANY
Number of pages
7
Pages from-to
2200058
UT code for WoS article
000804607300001
EID of the result in the Scopus database
2-s2.0-85131056773