Highly Efficient Avalanche Multiphoton Luminescence from Coupled Au Nanowires in the Visible Region

Abstract

We demonstrate highly efficient avalanche multiphoton luminescence (MPL) from ordered-arrayed gold nanowires (NWs) with low time-average excitation intensity, Iexc (5.0-9.1 kW/cm2). The intensity of avalanche MPL, IMPL, is about 10(4) times larger than that of three-photon luminescence, the slope partial differential log IMPL/ partial differential log Iexc of avalanche MPL reaches as high as 18.3, and the corresponding polarization dependence of IMPL has a form of cos50 phip. The emission dynamics of avalanche MPL and three-photon luminescence are also studied comparatively. These observations indicate that the highly efficient avalanche MPL is attributed to the giant enhancement and coupling of longitudinal surface plasmon resonance of ordered-arrayed gold NWs.

Strong Near-infrared Avalanche Photoluminescence from Ag Nanowire Arrays

“…On the other hand, for the avalanche PL from the sample with d NW =18 nm, the PL emission intensity along the long axis of the NWs (b emi =0°) is smaller than the one perpendicular to the long axis (b emi =90°), the corresponding p parameter has a negative value of −0.12, which is different from the Au NW arrays with resonant excitation of LSPR (L NW < 1.5 μm) [17]. The unique emission polarization behavior of Ag NW arrays with L NW approximately 8 μm may be caused by the strong dipole-dipole interaction of TSPR of nearby NWs.…”

“…For the linear PL from the sample with d NW =120 nm, the peak PL intensity at the emission wavelength of 914 nm excited by p-polarized laser ða exc ¼ 0 ; E excitation to the SPR coupling between the nearby NWs for the avalanche PL from the NW arrays. But the avalanche PL of Ag NWs induced by single-photon absorption is less sensitive to the excitation polarization angle α exc than that of Au NWs induced by multiphoton absorption [17].…”

“…Efficient PL from rough Ag surface attributed to the enhancement of local field was first reported by Boyd et al in 1986 [2]. Recently, efficient multiphoton luminescence in visible region from Au nanoparticles and avalanche upconversion from Au nanowires (NWs) has attracted increasing interest because of the high efficiency and great potential applications in optical information processing, sensing, and biolabeling [3][4][5][6][7][8][9][10][11][12][13][14][15][16][17].…”

Location-Dependent Local Field Enhancement Along the Surface of the Metal–Dielectric Core–Shell Nanostructure

“…Local surface plasmon resonance (LSPR) in the metal-dielectric composite nanostructures greatly enhances the local electric field [4][5][6]. These enhanced local electric fields can be used in many linear and nonlinear optical processes, such as surface-enhanced Raman scattering (SERS) [7], enhanced fluorescence emission of the adsorbed fluorescent materials [8], optical bistability [9], multiphoton luminescence [10], second harmonic generation [11], large third-order susceptibility [12], and photo-heat conversion [13].…”

Microstructure and multiphoton luminescence of Au nanocrystals prepared by using glancing deposition method

“…Both the density of states and the field enhancement effects played important roles in the process of multiphoton-induced PL [26,28,29]. Recently, Wang et al [30] reported highly efficient avalanche multiphoton luminescence (MPL) from ordered-arrayed gold nanowires. However, MPL from Au:oxide composite films prepared by radio frequency (r.f.)…”