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Updated: Oct 8, 2026

Optical Control of Living Cells Electrical Activity by Conjugated Polymers
Published on: January 28, 2016
Coherent control of optical emission from a conjugated polymer
S P Kennedy1, N Garro, R T Phillips
1Cavendish Laboratory, Madingley Road, Cambridge, CB3 0HE, United Kingdom.
Abstract:
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.
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