Coherent control of optical emission from a conjugated polymer.
We have observed that resonant Rayleigh scattering dominates the emission from poly(p-phenylene vinylene) excited with photons at energies below the threshold at which excitonic migration is reduced. The intensity of the resonant emission decays exponentially with a lifetime of up to 450 fs after pulsed excitation. The coherent nature of the emission was confirmed by angular variations in the far-field emission intensity-bright and dark speckles. Persistence of a coherent polarization was demonstrated by coherent control using phase-locked pulses.
Kennedy
S P
SP
Cavendish Laboratory, Madingley Road, Cambridge, CB3 0HE, United Kingdom.
Garro
N
N
Phillips
R T
RT