Demonstration of nonlinear absorption in Au semi-continuous film by electrical measurement

Yajadda, M. M. A., Farrant, D. I., Levchenko, I., Müller, K. H., & Ostrikov, K. (2011) Demonstration of nonlinear absorption in Au semi-continuous film by electrical measurement. Optics Express, 19(18), pp. 17167-17172.

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We have demonstrated the nonlinear absorption at 532 nm wavelength in an Au semi-continuous film (SF) resulting from smearing of the Fermi distribution and diffusion of conduction electrons into the substrate. The Au SF was irradiated by a pulsed laser with 8 ns pulse width at 532 nm in near resonance with the interband transition of the Au. We determined the temperature increase in the SF for different intensities by electrical measurement. We calculated the temperature increase by using a 1D heat transport equation; comparing the results of the calculation with measured values for the temperature increase, revealed the nonlinear absorption in the Au SF. We employed this deviation from linear behaviour to determine the nonlinear absorption coefficient.

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ID Code: 73681
Item Type: Journal Article
Refereed: Yes
DOI: 10.1364/OE.19.017167
ISSN: 1094-4087
Divisions: Current > Schools > School of Chemistry, Physics & Mechanical Engineering
Current > QUT Faculties and Divisions > Science & Engineering Faculty
Deposited On: 10 Jul 2014 04:21
Last Modified: 11 Jul 2014 00:02

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