Work

All-optical control of surface plasmons by second-harmonic generation

Year: 2018

Type: article

Abstract: All-optical control of surface plasmon polaritons (SPPs) is theoretically demonstrated in arrays of metallic slits. It is shown how the mixing of electromagnetic fields scattered by the slits from a weak beam at $\ensuremath{\lambda}$ wavelength, with second-harmonic fields generated by a high-intensity $2\ensuremath{\lambda}$ beam, creates a destructive interference of surface plasmons in one of the two possible directions of emission from the slits, while these are enhanced along the opposite direction. Our method enables spectrally broadband excitation and thus unidirectional launching of SPP pulses as short as $\ensuremath{\sim}\mathrm{20}$ fs, all-optically controlled. Based on these findings, an ultranarrow bandwidth surface plasmon frequency comb is designed.

Source: Physical review. B./Physical review. B

DOI: 10.1103/physrevb.98.041407

Author: Sergio G. Rodrigo

Institutions: Consejo Superior de Investigaciones Científicas, Universidad de Zaragoza, Centro Universitario de la Defensa Zaragoza

Language: English

Topic: Plasmonic and Surface Plasmon Research

Subfield: Biomedical Engineering

Field: Engineering

Domain: Physical Sciences

Open Access status: green

Funder: Ministerio de Ciencia e Innovación

Award: G8872572211