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SP excitation in silver nanowires deposited on the emission facet of a LD chip. (a) Sketch of the experimental scheme. (b) Height-dependent optical intensity above the surface of the emission area of an LD operated at 650 nm wavelength. (c) Optical micrograph of SP excitation at the end of a well-positioned silver nanowire (350 nm in diameter and in length) with radiation output at the other end (marked by the white arrow) on an LD chip. For comparison, no radiation output is observed in (d) when the end of the nanowire is moved out of the emission area. The nanowire position is shown in the insets in (c) and (d). (e) SEM image of three silver nanowires, each with one end positioned on the emission facet of an LD chip. The diameters of the nanowires are 380, 360, and 420 nm, from left to right. (f) Optical micrograph of SP excitation of the three nanowires on an LD chip. (g) SP excitation in a 310-nm-diameter silver nanowire ( in length) deposited on the emission facet of an LD operated at 780 nm wavelength. The nanowire position is shown in the inset. The scale bars in [(c)–(g)] are .
Polarization-dependent light output from an excited silver nanowire. [(a)–(c)] Optical micrographs of SP excitation in a 320-nm-diameter and -length silver nanowire with polarization angles of −7.7°, −45.9°, and −78.7°, respectively. The polarization directions are indicated in the insets. (d) Polarization-dependent output intensity. The solid line is the best-fit sine curve. The scale bars in [(a)–(c)] are .
Orientation-dependent light output from a silver nanowire. (a) Schematic diagram of nanowire manipulation with a fiber probe. Here is defined as the cross angle between the nanowire and the direction perpendicular to the length of the emission area. [(b)–(d)] Optical micrographs of SP excitation in a silver nanowire (230 nm in diameter and in length) with of 38°, 60°, and 70°, respectively. (e) Orientation-dependent output intensity. The scale bars in [(b)–(d)] are .
[(a) and (b)] Optical micrographs of SP excitation in a silver nanowire (440 nm in diameter and in length) before (a) and after (b) a nanorod (270 nm in diameter and in length) scattering source is added. Insets show optical micrographs (bottom right) and SEM image (upper right) of the nanowire. (c) Optical micrograph of SP excitation from the central part of a 330-nm-diameter and -length silver nanowire. Inset, SEM image of the nanowire. The scale bars are .
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