Nonlinear acousto-magneto-plasmonics

TL;DR

This paper reviews recent experimental and theoretical advances in nonlinear interactions among acoustic, magnetic, and plasmonic phenomena in hybrid multilayer structures excited by ultrashort laser pulses, emphasizing nonlinear optical and magneto-optical effects.

Contribution

It provides a comprehensive overview of nonlinear acousto-magneto-plasmonic interactions, including experimental techniques and theoretical models for understanding ultrashort pulse dynamics in hybrid structures.

Findings

Nonlinear optical detection via second harmonic generation in multilayers.

Quantification of ultrashort acoustic pulse reshaping using plasmonic interferometry.

Dynamic modulation of optical nonlinearities by ultrashort optical pulses.

Abstract

We review the recent progress in experimental and theoretical research of interactions between the acoustic, magnetic and plasmonic transients in hybrid metal-ferromagnet multilayer structures excited by ultrashort laser pulses. The main focus is on understanding the nonlinear aspects of the acoustic dynamics in materials as well as the peculiarities in the nonlinear optical and magneto-optical response. For example, the nonlinear optical detection is illustrated in details by probing the static magneto-optical second harmonic generation in gold-cobalt-silver trilayer structures in Kretschmann geometry. Furthermore, we show experimentally how the nonlinear reshaping of giant ultrashort acoustic pulses propagating in gold can be quantified by time-resolved plasmonic interferometry and how these ultrashort optical pulses dynamically modulate the optical nonlinearities. The effective medium approximation for the optical properties of hybrid multilayers facilitates the understanding of novel optical detection techniques. In the discussion we highlight recent works on the nonlinear magneto-elastic interactions, and strain-induced effects in semiconductor quantum dots.