Strong Near-infrared Avalanche Photoluminescence from Ag Nanowire Arrays
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- Gong, H.M., Zhou, Z.K., Xiao, S. et al. Plasmonics (2008) 3: 59. doi:10.1007/s11468-008-9054-2
Ag nanowire (NW) arrays with NW diameter dNW = 12–120 nm were electrodeposited in anodic aluminum oxide templates. Strong avalanche photoluminescence (PL) from Ag NW arrays with small dNW were observed near 914 nm by using picosecond laser at the excitation wavelength 808 nm, which is originated from the plasmon-enhanced radiative intraband transitions. The peak PL intensity of the avalanche PL from the sample with small diameter dNW = 12 nm is about 102 times stronger than that of the linear PL from the sample with large diameter dNW = 120 nm. The opposite excitation polarization dependence and emission polarization distribution of the PL from Ag NW array with dNW = 12 nm and dNW = 120 nm were also observed.