In particular , the photon quasiparticle has a modified relation between wavelength and energy ( dispersion relation ) , as described by the material 's index of refraction .
In materials , a photon quasiparticle is a photon as affected by its interactions with the material .
The photon quasiparticle has a modified relation between wavelength and energy ( dispersion relation ) , as described by the material 's index of refraction .
In materials , a photon quasiparticle is a photon as affected by its interactions with the material .