Accession Number:

ADA285225

Title:

Nonlinear Optical Response of Condined Excitions in Molecular and Semiconductor Nanostructures

Descriptive Note:

Annual rept. 1 Oct 1992-30 Sep 1993

Corporate Author:

ROCHESTER UNIV NY DEPT OF CHEMISTRY

Personal Author(s):

Report Date:

1993-09-30

Pagination or Media Count:

6.0

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 X3 with the number of double bonds, is related to the coherence of the relative motion of electron-hole pairs created upon optical excitation

Subject Categories:

  • Electrical and Electronic Equipment
  • Atomic and Molecular Physics and Spectroscopy
  • Optics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE