Characterization of nonlinear optical properties of silver oxide super resolution near-field structures by Z-scan measurements
Journal
Japanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers
Journal Volume
43
Journal Issue
8 A
Pages
5259-5261
Date Issued
2004
Author(s)
Abstract
Femtosecond laser Z-Scan measurements are used to characterize the nonlinear optical properties of AgO x super resolution near-field structures (super-RENS). Open aperture Z-Scan measurements reveal a complex transient nonlinear optical absorption response of AgO x super-RENS under intensive laser irradiation. This is attributed to the thermal decomposition of AgO x into Ag nanoparticles in the near-field optical mask layer. A bi-compositional model is proposed to explain this complex nonlinear optical response. The threshold laser peak intensity for the phase transition and the nonlinear optical absorption coefficient of an Ag nanoparticle are determined to be I th ∼0.3 GW/cm 2 and β=(-5.6±0.5)×10 3 cm/GW at λ=800 nm, respectively.
Publisher
Institute of Physics
Type
journal article