Second harmonic nano-particles for femtosecond coherent control on the nanoscale

TL;DR

This paper introduces a method for femtosecond laser pulse control at the nanoscale using second harmonic emission from various nano-particles, enabling precise ultrafast manipulation with high spatial resolution.

Contribution

It presents a comprehensive toolkit for nanoscale coherent control leveraging second harmonic signals from diverse nano-particles, demonstrating robustness across different materials and geometries.

Findings

Ultrafast femtosecond pulses can be compressed and controlled spatially at the nanoscale.

The method is effective on dielectric and metallic nano-particles of various sizes and shapes.

The approach offers unprecedented spatial accuracy in ultrafast laser pulse manipulation.

Abstract

We provide a complete toolkit for coherent control experiments on the nano-scale. By exploiting the second harmonic emission from single (150 nm) nonlinear nano-particles, we show that ultrafast femtosecond laser pulses can be compressed and controlled in time with unprecedented spatial accuracy. The method is tested on various nano-particles of different sizes, shapes and materials, both dielectric BaTiO3, Fe(IO3)3) and metallic (Au) thus demonstrating its robustness and versatility.