Fig. 3
Photo-induced symmetry breaking. a Absorption field ρ(r, λpump), normalized to its peak value inside the nanowire. The inset shows the excitation conditions: the angle of incidence θ = 34∘ and the in-plane pump polarization. The pump is centred at λpump = 400 nm, has a temporal full width at half maximum (FWHM) of τ = 100 fs and a low fluence F ~ 40 μJ cm−2. b Electron-hole pair density N(r, t) at t = 100 fs. c Real part of the permittivity variation Δε at λprobe = 765 nm and time delay t = 100 fs. d Degree of asymmetry Δ at λprobe = 765 nm as a function of time delay
