Jump to main content
Jump to site search


Ultra-fast dynamics in the nonlinear optical response of silver nanoprisms ordered arrays

Abstract

In this work we present the study of the ultra-fast dynamics of the nonlinear optical response of a honeycomb array of silver triangular nanoprisms, performed using a femtosecond pulsed laser tuned with the dipolar surface plasmon resonance of the nanoarray. Nonlinear absorption and refraction, and their time-dependence, were explored using the z-scan and time-resolved excite-probe techniques. Nonlinear absorption is shown to change sign with the input irradiance and the behavior was explained on the basis of a three-level model. The response time was determined to be in the picosecond regime. A technique based on a variable frequency chopper was also used in order to discriminate the thermal and electronic contributions to the nonlinearity, which were found to have opposite signs. All the findings propel the investigated nanoprism arrays as good candidates for applications in advanced ultra-fast nonlinear nanophotonic devices.

Back to tab navigation

Publication details

The article was received on 30 Nov 2017, accepted on 05 Feb 2018 and first published on 06 Feb 2018


Article type: Paper
DOI: 10.1039/C7NR08948A
Citation: Nanoscale, 2018, Accepted Manuscript
  •   Request permissions

    Ultra-fast dynamics in the nonlinear optical response of silver nanoprisms ordered arrays

    H. Sánchez-Esquivel, K. Raygoza-Sanchez, R. Rangel-Rojo, B. Kalinic, N. T. Michieli, T. Cesca and G. Mattei, Nanoscale, 2018, Accepted Manuscript , DOI: 10.1039/C7NR08948A

Search articles by author

Spotlight

Advertisements