TY - JOUR
T1 - Observation of the quantized motion of excitons in CdSe nanoplatelets
AU - Failla, Michele
AU - García Flórez, Francisco
AU - Salzmann, Bastiaan B.V.
AU - Vanmaekelbergh, Daniel
AU - Stoof, Henk T.C.
AU - Siebbeles, Laurens D.A.
PY - 2020
Y1 - 2020
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 - http://www.scopus.com/inward/record.url?scp=85096329342&partnerID=8YFLogxK
U2 - 10.1103/PhysRevB.102.195405
DO - 10.1103/PhysRevB.102.195405
M3 - Article
AN - SCOPUS:85096329342
SN - 2469-9950
VL - 102
JO - Physical Review B
JF - Physical Review B
IS - 19
M1 - 195405
ER -