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

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...

Full description

Saved in:
Bibliographic Details
Published in:Nanoscale 2018-03, Vol.1 (11), p.5182-519
Main Authors: Sánchez-Esquivel, Héctor, Raygoza-Sanchez, Karen Y, Rangel-Rojo, Raúl, Kalinic, Boris, Michieli, Niccolò, Cesca, Tiziana, Mattei, Giovanni
Format: Article
Language:English
Subjects:
Absorption
Femtosecond pulsed lasers
Honeycomb construction
Irradiance
Nonlinear dynamics
Nonlinear optics
Nonlinear response
Nonlinearity
Response time
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary: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 these findings propel the investigated nanoprism arrays as good candidates for applications in advanced ultra-fast nonlinear nanophotonic devices. The ultra-fast dynamics of the nonlinear optical response of Ag nanoprism arrays is investigated by z -scan and excite-probe techniques.
ISSN:2040-3364
2040-3372
DOI:10.1039/c7nr08948a