Bitmap and vectorial hologram recording by using femtosecond laser pulses

Y Kotsiuba,S Bellucci,I Hevko,I Gnilitskyi

doi:10.1038/s41598-021-95665-5

Abstract

In this paper, we present two approaches for recording a quasi-hologram on the steel surface by femtosecond laser pulses. The recording process is done by rotating the polarization of the laser beam by a half-wave plate or a spatial light modulator (SLM), so we can control the spatial orientation of the formed laser-induced periodic surface structures (LIPSS). Two different approaches are shown, which use vector and bitmap images to record the hologram. For the first time to our knowledge, we managed to record a hologram of a bitmap image by continuously adjusting the laser beam polarization by SLM during scanning. The developed method can substantially improve hologram recording technology by eliminating complex processing procedures, which can lead to increasing the fabrication speed and reducing the cost.

Highlights

In this paper, we present two approaches for recording a quasi-hologram on the steel surface by femtosecond laser pulses
The most common model of laser-induced periodic surface structures (LIPSS) formation supposes the generation of the nanostructures due to the interference of Surface Electromagnetic Wave (SEW) with the incident laser wave exciting a coherent surface plasmon-polariton (SPP) wave[15]
We present the results of recording quasi-holograms of vector and raster images by two different methods: by rotation of the polarization with half-wave plate and spatial light modulator

Summary

Introduction

We present two approaches for recording a quasi-hologram on the steel surface by femtosecond laser pulses. The recording process is done by rotating the polarization of the laser beam by a half-wave plate or a spatial light modulator (SLM), so we can control the spatial orientation of the formed laser-induced periodic surface structures (LIPSS). The digital holography substantially expands the capabilities of traditional holography, since it does not require a laser to record hologram and can be used to visualize multidimensional information[3,4,5] It allows the design of unique three-dimensional amplitude and phase fields that can expand the variety of holographic elements. Using direct laser interference patterning (DLIP) Voisiat et al.[32] managed to avoid colour variation in the recorded nanostructured image for an arbitrary viewing angle Another example of recording hologram using DLIP is described in33

Methods

Results

Conclusion