Abstract
We present a spectroscopic study on a novel blend of a light-emitting polymer (F8BT) and a liquid crystal (5CB). We investigate the possibility to control the optical behavior of such blend with an external stimulus. By means of ultrafast pump–probe spectroscopy we observe a modulation of the stimulated emission of the polymer driven by an external applied voltage. We attribute the rise of the stimulated emission to a rearrangement of the polymer that modifies its packing as a consequence of the alignment of the liquid crystal. Such field-induced stimulated emission modulation can find applications in information and communication technology, lasing and optical sensing.
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