TY - UNPB
T1 - Observation of the quantized motion of excitons in CdSe nanoplatelets
AU - Failla, Michele
AU - Flórez, Francisco Garca
AU - Salzmann, Bastiaan B.V.
AU - Vanmaekelbergh, Daniel
AU - Stoof, Henk T.C.
AU - Siebbeles, Laurens D.A.
PY - 2020/7/16
Y1 - 2020/7/16
N2 - We show that the finite lateral sizes of ultrathin CdSe nanoplatelets strongly affect both their photoluminescence and optical absorption spectra. This is in contrast to the situation in quantum wells, in which the large lateral sizes may be assumed to be infinite. The lateral sizes of the nanoplatelets are varied over a range of a few to tens of nanometers. For these sizes excitons experience in-plane quantum confinement, and their center-of-mass motion becomes quantized. Our direct experimental observation of the discretization of the exciton center-of-mass states can be well understood on the basis of the simple particle-in-a-box model.
AB - We show that the finite lateral sizes of ultrathin CdSe nanoplatelets strongly affect both their photoluminescence and optical absorption spectra. This is in contrast to the situation in quantum wells, in which the large lateral sizes may be assumed to be infinite. The lateral sizes of the nanoplatelets are varied over a range of a few to tens of nanometers. For these sizes excitons experience in-plane quantum confinement, and their center-of-mass motion becomes quantized. Our direct experimental observation of the discretization of the exciton center-of-mass states can be well understood on the basis of the simple particle-in-a-box model.
UR - https://www.mendeley.com/catalogue/8471876b-aa46-38cf-9087-2b1fe649edb6/
U2 - 10.1103/PhysRevB.102.195405
DO - 10.1103/PhysRevB.102.195405
M3 - Preprint
SP - 1
EP - 6
BT - Observation of the quantized motion of excitons in CdSe nanoplatelets
PB - arXiv
ER -