Zero-phonon linewidth in CdSe/ZnS core/shell nanorods.
High-resolution spectral hole-burning studies of CdSe/ZnS core/shell nanorods reveal a sharp zero-phonon line, with a line width dependent on the measurement time scale. The zero-phonon line width is attributed to contributions from radiative decay, spectral diffusion induced by surface electric field fluctuations, and phonon-assisted migration of excitons localized in the nanorods. A decoherence rate as small as 4.5 GHz has been observed, when the effects of spectral diffusion are suppressed in the spectral hole-burning measurement. Comparison between zero-phonon line widths in nanorods and spherical nanocrystals also elucidates important differences in the decoherence process between the one- and zero-dimensional nanostructures.
Tavenner-Kruger
Sasha
S
Department of Physics, University of Oregon, Eugene, Oregon 97403, USA.
Park
Young-Shin
YS
Lonergan
Mark
M
Woggon
Ulrike
U
Wang
Hailin
H
D019187:Cadmium Compounds / Q000737:chemistry*; D008027:Light; D008422:Materials Testing; D043942:Nanotubes / Q000737:chemistry*; D010777:Photochemistry / Q000379:methods*; D012542:Scattering, Radiation; D018036:Selenium Compounds / Q000737:chemistry*; D012666:Semiconductors; D017967:Zinc Compounds / Q000737:chemistry*
D019187:Cadmium Compounds; D018036:Selenium Compounds; D017967:Zinc Compounds; C058667:cadmium selenide; C044696:zinc selenide