Femtosecond LIPSS on indium-tin-oxide thin films at IR wavelengths

We investigated laser-induced periodic surface structures (LIPSS) generated on indium-tin-oxide thin films with femtosecond laser pulses in the infrared region. Using pulses between 1.6 and 2.4 mu m central wavelengths, we observed robust LIPSS morphologies with a periodicity close to lambda/10. Supporting finite-difference time-domain calculations suggests that the surface forms are rooted in the field localization in the surface pits leading to a periodically increased absorption of the laser pulse energy that creates the observed periodic structures. (C) 2022 Optica Publishing Group

Automated summary

In this study, we investigated laser-induced periodic surface structures (LIPSS) generated on indium-tin-oxide thin films using femtosecond laser pulses in the infrared region. We observed robust LIPSS morphologies with a periodicity close to lambda/10 using pulses with central wavelengths between 1.6 and 2.4 μm. Finite-difference time-domain calculations support that the surface forms are rooted in the field localization in the surface pits, leading to periodically increased absorption of the laser pulse energy and the creation of the observed periodic structures.