Optical shaping of the polarization anisotropy in a laterally coupled quantum dot dimer.

ABSTRACT: We find that the emission from laterally coupled quantum dots is strongly polarized along the coupled direction [1 1 ¯ 0], and its polarization anisotropy can be shaped by changing the orientation of the polarized excitation. When the nonresonant excitation is linearly polarized perpendicular to the coupled direction [110], excitons (X₁ and X₂) and local biexcitons (X₁X₁ and X₂X₂) from the two separate quantum dots (QD₁ and QD₂) show emission anisotropy with a small degree of polarization (10%). On the other hand, when the excitation polarization is parallel to the coupled direction [1 1 ¯ 0], the polarization anisotropy of excitons, local biexcitons, and coupled biexcitons (X₁X₂

SUBMITTER: Kim H 

PROVIDER: S-EPMC7286917 | biostudies-literature | 2020

REPOSITORIES: biostudies-literature