Abstract

Polyacetylene has a nonlinear excitation of soliton in a trans form, because of the degeneracy between (—C=C—)_n (A-phase) and (=C—C=)„ (B-phase). According to the simulation performed using SSH (Su-Schrieffer-Heeger) Hamiltonian,¹ a photogenerated electron-hole pair evolves into a soliton-antisoliton pair within the 100-fs following the photoexcitation as a result of one-dimensionality of the system. It has been also theoretically predicted² that within this initial time the soliton pair is spatially localized, and it forms a dynamic bound state called a breather.

© 2002 Optical Society of America