title: Nanoengineering the second order susceptibility in semiconductor quantum dot heterostructures.
abstract: We study second-harmonic generation from single CdTe/CdS core/shell rod-on-dot nanocrystals with different geometrical parameters, which allow to fine tune the nonlinear properties of the nanostructure. These hybrid semiconductor-semiconductor nanoparticles exhibit extremely strong and stable second-harmonic emission, although the size of CdTe core is still within the strong quantum confinement regime. The orientation sensitive polarization response is analyzed by means of a pointwise additive model of the third-order tensors associated to the nanoparticle components. These findings prove that engineering of semiconducting complex heterostructures at the single nanoparticle scale can lead to extremely bright nanometric nonlinear light sources.
authors: Laboratoire de Photonique Quantique et Moléculaire, Ecole Normale Supérieure de Cachan, Cachan, France. 5marcin.zielinski@ens-cachan.fr
authors: Marcin
authors: M
authors: Zielinski
authors: Shoshana
authors: S
authors: Winter
authors: Radoslaw
authors: R
authors: Kolkowski
authors: Claude
authors: C
authors: Nogues
authors: Dan
authors: D
authors: Oron
authors: Joseph
authors: J
authors: Zyss
authors: Dominique
authors: D
authors: Chauvat
mesh_terms: D019187:Cadmium Compounds / Q000737:chemistry*; D008422:Materials Testing; D036103:Nanotechnology / Q000379:methods*; D045663:Quantum Dots; D012666:Semiconductors; D013691:Tellurium / Q000737:chemistry*
chemical_list: D019187:Cadmium Compounds; D013691:Tellurium; C028337:cadmium telluride