Nonlinear Optical Response of Condined Excitions in Molecular and Semiconductor Nanostructures
Abstract
A dynamical theory that connects electronic motions and the nonlinear optical response of conjugated polyenes is developed by introducing the concept of electronic normal modes. A novel picture for the mechanism of optical nonlinearities is obtained by identifying the few dominant modes. This quasiparticle electron-hole representation established a close analogy with small semiconductor particles (quantum dots), and is very different for the traditional approach based on the electronic eigenstates. The effective conjugation length (coherence size), which controls the scaling and saturation of the static third order susceptibility X(3) with the number of double bonds, is related to the coherence of the relative motion of electron-hole pairs created upon optical excitation
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 30, 1993
- Accession Number
- ADA285225
Entities
People
- Shaul Mukamel
Organizations
- University of Rochester