TY - JOUR

T1 - Topography Tuning for Plasmonic Color Enhancement via Picosecond Laser Bursts

AU - Guay, Jean Michel

AU - Calà Lesina, Antonino

AU - Baxter, Joshua

AU - Killaire, Graham

AU - Ramunno, Lora

AU - Berini, Pierre

AU - Weck, Arnaud

N1 - Funding information: The authors acknowledge the Royal Canadian Mint, the Natural Sciences and Engineering Council of Canada, the Canada Research Chairs program, the Southern Ontario Smart Computing Innovation Platform (SOSCIP), and SciNet. The authors would like to acknowledge Guillaume Côté, Martin Charron, and COOP student Mael Chow-Cloutier at the University of Ottawa.

PY - 2018/6/25

Y1 - 2018/6/25

N2 - The tuning of 3D topographical features on silver for the production of plasmonic colors is reported. The topography is produced by applying closely time-spaced laser bursts. Using laser bursts increases the Chroma of the colors produced by up to 100% compared to the nonburst coloring method. By adjusting the energy distribution of the laser pulses in a burst, while maintaining the total burst energy constant, significantly different color palettes and topographical structures are produced. Scanning electron microscope analysis of the surfaces produced reveals the creation of three distinct sets of laser-induced periodic-like surface structures (LIPSS): low spatial frequency LIPSS (LSFL), high spatial frequency LIPSS (HSFL), and large LIPSS that have a period about 7× that of the laser wavelength. Two-temperature model simulations of silver irradiated by a laser burst show a significant increase in the electron–phonon coupling which is mainly responsible for the creation of LIPSS. Finite-difference time-domain simulations of a model of the surface, consisting of nanoparticles arranged on a sinusoidal-modulated surface of varying amplitude (0 to 150 nm) and period (200 and 1000 nm), elucidate the importance of the HSFL and LSFL structures for color formation, including the increase in Chroma (saturation) observed experimentally.

AB - The tuning of 3D topographical features on silver for the production of plasmonic colors is reported. The topography is produced by applying closely time-spaced laser bursts. Using laser bursts increases the Chroma of the colors produced by up to 100% compared to the nonburst coloring method. By adjusting the energy distribution of the laser pulses in a burst, while maintaining the total burst energy constant, significantly different color palettes and topographical structures are produced. Scanning electron microscope analysis of the surfaces produced reveals the creation of three distinct sets of laser-induced periodic-like surface structures (LIPSS): low spatial frequency LIPSS (LSFL), high spatial frequency LIPSS (HSFL), and large LIPSS that have a period about 7× that of the laser wavelength. Two-temperature model simulations of silver irradiated by a laser burst show a significant increase in the electron–phonon coupling which is mainly responsible for the creation of LIPSS. Finite-difference time-domain simulations of a model of the surface, consisting of nanoparticles arranged on a sinusoidal-modulated surface of varying amplitude (0 to 150 nm) and period (200 and 1000 nm), elucidate the importance of the HSFL and LSFL structures for color formation, including the increase in Chroma (saturation) observed experimentally.

KW - plasmonic colors

KW - surface colorization

KW - ultrafast laser machining

UR - http://www.scopus.com/inward/record.url?scp=85052731910&partnerID=8YFLogxK

U2 - 10.1002/adom.201800189

DO - 10.1002/adom.201800189

M3 - Article

AN - SCOPUS:85052731910

VL - 6

JO - Advanced optical materials

JF - Advanced optical materials

SN - 2195-1071

IS - 17

M1 - 1800189

ER -