In this paper, the presence of localized plasmon-like modes at the surface of a silicon two-dimensional photonic crystal slab is demonstrated. In analogy with surface plasmons supported in metals, we observe that, in a photonic crystal metamaterial, the electromagnetic surface waves arise from a negative effective permittivity. The proposed device is dimensioned in order to support surface states in a large spectral window ('1550-1650 nm). The result opens strategies in light control at the nanoscale, allowing on chip light manipulation in a wide frequency range and avoiding the intrinsic limits of plasmonic structures due to absorption losses in metals.
Plasmon-like surface states in negative refractive index photonic crystals
DE TOMMASI EDOARDO;DE LUCA ANNA CHIARA;ROMANO SILVIA;RENDINA IVO;MOCELLA VITO
2013
Abstract
In this paper, the presence of localized plasmon-like modes at the surface of a silicon two-dimensional photonic crystal slab is demonstrated. In analogy with surface plasmons supported in metals, we observe that, in a photonic crystal metamaterial, the electromagnetic surface waves arise from a negative effective permittivity. The proposed device is dimensioned in order to support surface states in a large spectral window ('1550-1650 nm). The result opens strategies in light control at the nanoscale, allowing on chip light manipulation in a wide frequency range and avoiding the intrinsic limits of plasmonic structures due to absorption losses in metals.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
