Abstract
The excitation profile for solitons in trans-${(\mathrm{CH})}_{x}$ was determined by measuring the strength of the photoinduced absorption as a function of the photogeneration source. The results demonstrate soliton photoproduction at energies well below the principal interband absorption edge. These data prove that charged soliton-antisoliton pairs are photogenerated directly (threshold $\ensuremath{\hbar}\ensuremath{\omega}=\frac{4\ensuremath{\Delta}}{\ensuremath{\pi}}$) assisted by quantum fluctuations in the ground state, as well as indirectly at higher energies ($\ensuremath{\hbar}\ensuremath{\omega}>~2\ensuremath{\Delta}$) via structural relaxation around electron-hole excitations.
Published Version
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