Linearly Polarized Emission from Colloidal Semiconductor Quantum Rods

  title={Linearly Polarized Emission from Colloidal Semiconductor Quantum Rods},
  author={Jiangtao Hu and Liang-Shi Li and Weidong Yang and Liberato Manna and Lin-wang Wang and A Paul Alivisatos},
  pages={2060 - 2063}
Colloidal quantum rods of cadmium selenide (CdSe) exhibit linearly polarized emission. Empirical pseudopotential calculations predict that slightly elongated CdSe nanocrystals have polarized emission along the long axis, unlike spherical dots, which emit plane-polarized light. Single-molecule luminescence spectroscopy measurements on CdSe quantum rods with an aspect ratio between 1 and 30 confirm a sharp transition from nonpolarized to purely linearly polarized emission at an aspect ratio of 2… 
Tunable near field dipole-dipole coupling between CdSe/CdS nanorods
Colloidal semiconductor quantum rods (nanorods) exhibit size tunable absorption and emission spectra with a high oscillator strength in combination with the emission of linearly polarised light [1].
Circularly polarized emission from colloidal nanocrystal quantum dots confined in microcavities formed by chiral mirrors
Colloidal semiconductor nanocrystal quantum dots (NQDs) confined in a microcavity device emit resonance-enhanced, circularly polarized (CP) light, when the device consists of a pair of chiral
Controlled fabrication of individual silicon quantum rods yielding high intensity, polarized light emission.
Elongated silicon quantum dots were fabricated using a lithographic process which reliably yields sufficient numbers of emitters and exhibit extraordinarily high linear polarization with respect to both absorption and emission.
Anisotropy of optical transitions in ordered ensemble of CdSe quantum rods.
The nonzero constant value of anisotropy was investigated for the high-energy transitions, and is evidence of the one-dimensional confinement in the QR.
Electronic structure transformation from a quantum-dot to a quantum-wire system: Photoluminescence decay and polarization of colloidal CdSe quantum rods
Radiative lifetime, polarization, and the global Stokes shift of colloidal CdSe quantum rods with aspect ratios from 1.9 to 3.8 are measured at room temperature. The radiative lifetime and the global
Energy transfer and polarized emission in cadmium selenide nanocrystal solids with mixed dimensionality
Excited-state energy transfer from spherical green-light-emitting nanocrystals as donor to rod-shaped red-light-emitting nanocrystals as acceptor is shown to result in a predominant red fluorescence
Circular Dichroism of Electric-Field-Oriented CdSe/CdS Quantum Dots-in-Rods.
Anisotropy of intrinsic chiroptical response in CdSe/CdS quantum dot-in-rod systems is reported and a direct connection between theoretically derived morphological parameters of twisting in nanocrystals lattices and experimental data parameters of circular dichroism anisotography is calculated.
Colloidal CdSe/CdS dot-in-plate nanocrystals with 2D-polarized emission.
A novel class of nanocrystals with mixed dimensionality: a dot-in-plate core/shell nanostructure synthesized by growing a flat, disk-shaped, CdS shell on spherical CdSe cores that exhibits an emission strongly polarized in two dimensions.
Optical Anisotropy of Electronic Excitations in Elliptical Quantum Dots
The authors report that anisotropic confining potentials in laterally coupled semiconductor quantum dots (QDs) have large impacts in optical transitions and energies of intershell collective