Abstract
AbstractAn effect of irradiation with intense laser light on trans‐polyacetylene is investigated. It is found that laser radiation gives rise to an enhancement of the background intensity in Raman scattering, which finally develops into a strong luminescence band. This new luminescence band consists of several bands with a peak‐energy spacing of 1200 to 1400 cm−1 and exhibits an unusual dependence on the excitation energy in that each band of luminescence shifts with the laser frequency like a fist‐order Raman spectrum. It is suggested from comparison with the other experimental results that the luminescence observed in the trans‐polyacetylene sample degraded by laser irradiation originates from the excited state with a decay time of 1200 ps.
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