Fig. 2: Optical pump-optical probe experiments in transmission geometry with collinear pulses. | npj Quantum Materials

Fig. 2: Optical pump-optical probe experiments in transmission geometry with collinear pulses.

From: Theory of terahertz pump optical probe spectroscopy of phonon polaritons in noncentrosymmetric systems

Fig. 2

a Phase-matched points for different values of \({n}_{{\rm{eV}}}/\sqrt{{\varepsilon }_{\infty }}\), changed between 1.20 (light blue), 1.35 (blue) and 1.54 (dark blue). b Corresponding transmitted intensity \(| {{\bf{A}}}_{{\rm{tr}}}({\omega }_{pp})|\). In both panels, ωLO = 1.125ωTO, γ = 0.01ωTO and \(d=50c/{\omega }_{{\rm{TO}}}\sqrt{{\varepsilon }_{\infty }}\) (order of 100 μm in typical samples). Dotted lines highlight ωTO and ωLO.

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