Near Field Imaging of a GaAs Photonic Crystal Cavity and Waveguide Using a Metal Coated Fiber Tip

We report optical near field characterization of a GaAs photonic crystal waveguide which is side coupled to a nano cavity. We observe the effect of the metal coated probe on the resonance wavelength and the intensity distribution. The measurements fit well to finite difference time domain simulations. (C) 2009 Optical Society of America