Spin relaxation in zinc blende and wurtzite CdSe quantum dots

• DOI: 10.1016/j.cplett.2010.03.081
• Publication Date: 2010-04-01T08:37:55Z
• Authors: Vanessa M. Huxter; Jeongho Kim; Shun S. Lo; Anna Lee; P. Sreekumari Nair; Gregory D. Scholes
• Keywords: Wurtzite crystal structure; Biexciton

Abstract We report exciton spin relaxation dynamics in colloidal wurtzite and zinc blende CdSe quantum dots measured using ultrafast cross-polarized heterodyned transient grating spectroscopy. The zinc blende (cubic base) quantum dots have a simpler fine structure as compared to wurtzite (hexagonal base) due to differences in the crystal field splitting. Faster exciton spin relaxation dynamics are observed in the zinc blende quantum dots.