Open AccessNanoengineering the second order susceptibility in semiconductor quantum dot heterostructures
Author(s) -
Marcin Zieliński,
Shoshana Winter,
Radosław Kołkowski,
Claude Noguès,
Dan Oron,
Joseph Zyss,
Dominique Chauvat
Publication year - 2011
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.19.006657
Subject(s) - quantum dot , heterojunction , materials science , semiconductor , second harmonic generation , nanoengineering , nanoparticle , optoelectronics , nonlinear optics , nanocrystal , nanostructure , cadmium telluride photovoltaics , polarization (electrochemistry) , nanotechnology , condensed matter physics , optics , physics , laser , chemistry
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.