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キーワード:
REFRACTIVE-INDEX; LASER-BEAM; POLARIZATION; FORCESPhysics;
要旨:
An air-silica photonic crystal fibre with a gold nanowire at core centre is shown to support a low-loss azimuthally polarized mode. Since all the other modes have very high attenuation, the fibre effectively supports only this mode, acting as a single-polarization fibre with an extinction ratio >20 dB cm(-1) over a broad range of wavelengths (550-1650 nm in the device reported). It can be used as an effective azimuthal mode filter.