The binding energy of biexcitons in alloy ZnxCd1− xS quantum dots detected by femtosecond laser spectroscopy

Nadtochenko, V.; Kostrov, A.; Titov, A.; Aybush, A.; Gostev, F.; Shelaev, I.; Shepel, D.; Antonova, O.; Kochev, S.; Kabachii, Y.; Valetsky, P.

Информация о цитировании статьи получена из Web of Science, Scopus
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 24 сентября 2020 г.

Авторы: Viktor Nadtochenko, Andrei Kostrov, Andrei Titov, Arseniy Aybush, Fedor Gostev, Ivan Shelaev, Denis Shepel, Olga Antonova, Sergei Kochev, Yuriy Kabachii, Pyotr Valetsky
Журнал: Applied Physics A: Materials Science and Processing
Том: 126
Год издания: 2020
Издательство: Springer Verlag
Местоположение издательства: Germany
Номер статьи: 287
DOI: 10.1007/s00339-020-3432-9
Аннотация: Biexcitons localized at ZnxCd1−xS quantum dots (x = 0.37 or 0.45) with a diameter of ~ 45 Å synthesized by two different methods were studied by femtosecond laser spectroscopy. The spectral features of ultrafast transient absorption spectra at the short-time delay of 70 fs are associated with the three lowest energy transitions of quantum dots. The shapes of the transient absorption bands were modeled by fitting to linear absorption. The spectral positions of the absorption components of the excited state in the transient spectra take into account the energy of the biexciton coupling. By fitting the experimental transient absorption spectra of ZnxCd1−xS QDs, the binding energies of biexcitons were determined. The biexciton binding energies vary from 16.6 to 37 meV depending on the biexciton transition excited at the ZnxCd1−xS quantum dot.
Добавил в систему: Кочев Сергей Юрьевич

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