V. Janonis, R. Balagula, P. Prystawko, I. Kašalynas
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Investigation of spatial coherence of hybrid surface plasmon-phonon-polaritons in n-GaN gratings
Record high spatial coherence values up to 87λ (130λ) in experiment (theory) were reported for polarized emission of surface plasmon-phonon polaritons excited in shallow surface relief n-GaN grating. Unusual independence of quality factor and dependence of spatial coherence length on the grating wavevector were observed in the course of a thorough investigation of dispersion characteristics of these quasiparticles.