Research output: Contribution to journal › Article › peer-review
Role of Valley Anisotropy in Optical Absorption of Monodisperse PbS Nanocrystals. / Литвяк, Валентина Михайловна; Чербунин, Роман Викторович; Nestoklon, Mikhail; Poddubny, Alexander; Golubkov, Valerii; Onushchenko, Petr; Babkina, Anastasiya; Onushchenko, Alexei; Goupalov, Serguei.
In: ACS Nano, 2017, p. 27766-27773.Research output: Contribution to journal › Article › peer-review
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TY - JOUR
T1 - Role of Valley Anisotropy in Optical Absorption of Monodisperse PbS Nanocrystals
AU - Литвяк, Валентина Михайловна
AU - Чербунин, Роман Викторович
AU - Nestoklon, Mikhail
AU - Poddubny, Alexander
AU - Golubkov, Valerii
AU - Onushchenko, Petr
AU - Babkina, Anastasiya
AU - Onushchenko, Alexei
AU - Goupalov, Serguei
PY - 2017
Y1 - 2017
N2 - We study light absorption by nearly monodisperse PbS nanocrystalsgrown in a glass matrix. The absorption spectra demonstrate a well-resolvedstructure at energies above the first absorption peak. The absorption cross sections are calculated with an empirical tight-binding model accounting for the quantum confinement, the band anisotropy, and valley splittings. Absorption spectra measured at 4 K quantitatively agree with the atomistic calculations. This allows us to unambiguously ascribe the much-debated second absorption peak to the p−p optical transition and directly measure the splitting of excited p states.
AB - We study light absorption by nearly monodisperse PbS nanocrystalsgrown in a glass matrix. The absorption spectra demonstrate a well-resolvedstructure at energies above the first absorption peak. The absorption cross sections are calculated with an empirical tight-binding model accounting for the quantum confinement, the band anisotropy, and valley splittings. Absorption spectra measured at 4 K quantitatively agree with the atomistic calculations. This allows us to unambiguously ascribe the much-debated second absorption peak to the p−p optical transition and directly measure the splitting of excited p states.
M3 - Article
SP - 27766
EP - 27773
JO - ACS Nano
JF - ACS Nano
SN - 1936-0851
ER -
ID: 37740579