Giant Optical Activity of Quantum Dots, Rods, and Disks with Screw Dislocations.

ABSTRACT: For centuries mankind has been modifying the optical properties of materials: first, by elaborating the geometry and composition of structures made of materials found in nature, later by structuring the existing materials at a scale smaller than the operating wavelength. Here we suggest an original approach to introduce optical activity in nanostructured materials, by theoretically demonstrating that conventional achiral semiconducting nanocrystals become optically active in the presence of screw dislocations, which can naturally develop during the nanocrystal growth. We show the new properties to emerge due to the dislocation-induced distortion of the crystal lattice and the associated alteration of the nanocrystal's electronic subsystem, which essentially modifies its interaction with ex

SUBMITTER: Baimuratov AS 

PROVIDER: S-EPMC4589690 | biostudies-literature | 2015 Oct

REPOSITORIES: biostudies-literature