Photoinduced quantum interference antiresonances in pi-conjugated polymers.
We observed photoinduced quantum interference antiresonances between several discrete infrared-active vibrations and the lower-polaron continuous absorption band in a series of pi-conjugated polymer films having superior planar orders, where the polaron transition energy is relatively small. The photoinduced Fano-type antiresonances are well explained by extending the amplitude mode model beyond the adiabatic limit. The agreement between the data and the model confirms the presence of a continuous electronic band above the polaron state. We show that high frequency modes are strongly coupled to electrons, with implications for superconductivity.
Osterbacka
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Department of Physics, Abo Akademi University, Porthansgatan 3, FIN-20500 Turku, Finland.
Jiang
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An
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Horovitz
B
B
Vardeny
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