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(a) Scanning electron micrograph of the fabricated gold particle chains (scale bar: ). (b) Schematic of the optical setup.
Experimental scattering intensity spectra for (a) and (b) under (gray) and (black) and longitudinal polarization. [(c) and (d)] Corresponding calculated scattering power spectra. The dashed curve corresponds to an imperfect chains including some geometrical defects.
(Color online) Electric near-field distribution calculated above a 15 particle chain for (a) at , (b) at , (c) at for the imperfect chain considered in Fig. 2(c), (d) above a continuous gold wire of the same length and section for at . The arrows indicate the incident vector direction. (e) Evolution with the incident wavelength of the ELDOS calculated above a 15 particle chain. The rectangle gives the chain and wire location.
Evolution of the TPL intensity with the incident wavelength for (a) and (b) both under longitudinal (squares) and transversal (triangles) polarizations. Data points for longitudinal polarization are fitted (red line) with a two peak Lorentzian model.
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