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Ultrafast lattice dynamics in lead selenide quantum dot induced by laser excitation

Title: Ultrafast lattice dynamics in lead selenide quantum dot induced by laser excitation.
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Name(s): Wang, Xuan, author
Rahmani, Hamidreza, author
Zhou, Jun, author
Gorfien, Matthew, author
Plaskus, Joshua Mendez, author
Li, Dong, author
Voss, Ryan, author
Nelson, Cory A., author
Lei, Kin Wai, author
Wolcott, Abraham, author
Zhu, Xiaoyang, author
Li, Junjie, author
Cao, Jianming, author
Type of Resource: text
Genre: Text
Date Issued: 2016-10-10
Physical Form: computer
online resource
Extent: 1 online resource
Language(s): English
Abstract/Description: We directly monitored the lattice dynamics in PbSe quantum dots (QD) induced by laser excitation using ultrafast electron diffraction. The energy relaxation between the carriers and the lattice took place within 10 ps, showing no evidence of any significant phonon bottleneck effect. Meanwhile, the lattice dilation exhibited some unusual features that could not be explained by the available mechanisms of photon-induced acoustic vibrations in semiconductors alone. The heat transport between the QDs and the substrate deviates significantly from Fourier's Law, which opens questions about the heat transfer under nonequilibrium conditions in nanoscale materials. Published by AIP Publishing.
Identifier: FSU_libsubv1_wos_000386534800044 (IID), 10.1063/1.4964269 (DOI)
Keywords: carrier-multiplication, coherent acoustic phonons, diffraction, Efficiency, generation, mechanisms, microcrystallites, pbse nanocrystals, photogeneration
Publication Note: The publisher’s version of record is available at http://www.dx.doi.org/10.1063/1.4964269
Persistent Link to This Record: http://purl.flvc.org/fsu/fd/FSU_libsubv1_wos_000386534800044
Host Institution: FSU
Is Part Of: Applied Physics Letters.
0003-6951
Issue: iss. 15, vol. 109

Choose the citation style.
Wang, X., Rahmani, H., Zhou, J., Gorfien, M., Plaskus, J. M., Li, D., … Cao, J. (2016). Ultrafast lattice dynamics in lead selenide quantum dot induced by laser excitation. Applied Physics Letters. Retrieved from http://purl.flvc.org/fsu/fd/FSU_libsubv1_wos_000386534800044