We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Nonlinear refraction of silver nanowires from nanosecond to femtosecond laser excitation.
- Authors
Han, Y.P.; Sun, J.L..; Ye, H.A.; Wu, W.Z.; Shi, G.
- Abstract
In order to investigate the effect of pulse width and solvent on the nonlinear properties of metal nanostructures, silver nanowires were fabricated in a direct current electric field (DCEF) using a solid-state ionic method and characterized by transmission electron microscopy (TEM) and X-ray diffraction (XRD). The nonlinear refractive index ( γ) of silver nanowires suspended in ethanol was measured using the Z-scan technique and laser radiation of various (femto-, pico-, and nanosecond) pulse durations. Experimental results indicated that silver nanowires have obvious positive refractive nonlinearities and γ (the Kerr-induced self-focusing) increases as the pulse duration increases from 7.4×10−8 cm2/GW at 110 fs to 1.6×10−4 cm2/GW at 8 ns, due to the additional influence of the atomic reorientational Kerr effect in the case of longer pulses. Due to the solvent dependence of the nonlinear behavior of the silver nanowires, the nonlinear absorption and refraction of silver nanowires suspended in de-ionized water are smaller than those of silver samples suspended in ethanol. The thermal nonlinearities are insignificant in our experimental conditions.
- Subjects
NANOWIRES; SILVER; NANOSTRUCTURED materials; ELECTRIC wire; LASERS; PHYSICS
- Publication
Applied Physics B: Lasers & Optics, 2009, Vol 94, Issue 2, p233
- ISSN
0946-2171
- Publication type
Article
- DOI
10.1007/s00340-008-3333-7