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We report on terahertz (THz) emission from a photoconductive antenna made of stretch-oriented poly(p-phenylene vinylene) (PPV) obtained by two-photon optical excitation. The spectrum of the THz emission was detected by an autocorrelation technique with about 1ps time resolution, limited by the antenna bandwidth. The ultrafast generation of the photocurrent is compatible with a direct carrier excitation...
Transient excited-state absorption measurements in the spectral region spanning the infrared active vibrational active (IRAV) modes in prototypical luminescent polymers, poly(phenylene vinylene) (PPV), and poly[2-methoxy-5-(2-ethyl-hexyloxy)-(phenylene vinylene)] (MEH-PPV), reveal charge carrier generation within 100fs after photoexcitation. The photocarrier quantum efficiency in MEH-PPV is φ ...
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