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Nonlinear optics

Quasiparticles undressed

In a polaron, an electron and the lattice distortion that it induces in a crystal form a 'quasiparticle'. But a strong electric field can displace the two constituents with respect to each other, giving a glimpse at the polaron's internal dynamics.

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Figure 1: A polaron in GaAs.


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Averitt, R. Quasiparticles undressed. Nature Phys 4, 14–15 (2008).

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