Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

Photoluminescent Microbit Inscripion inside Dielectric Crystals by Ultrashort Laser Pulses for Archival Applications

Version 1 : Received: 9 May 2023 / Approved: 11 May 2023 / Online: 11 May 2023 (05:27:42 CEST)

How to cite: Kudryashov, S.; Danilov, P.; Smirnov, N.; Kuzmin, E.; Rupasov, A.; Khmelnitskii, R.; Krasin, G.; Mushkarina, I.; Gorevoy, A. Photoluminescent Microbit Inscripion inside Dielectric Crystals by Ultrashort Laser Pulses for Archival Applications. Preprints 2023, 2023050799. https://doi.org/10.20944/preprints202305.0799.v1 Kudryashov, S.; Danilov, P.; Smirnov, N.; Kuzmin, E.; Rupasov, A.; Khmelnitskii, R.; Krasin, G.; Mushkarina, I.; Gorevoy, A. Photoluminescent Microbit Inscripion inside Dielectric Crystals by Ultrashort Laser Pulses for Archival Applications. Preprints 2023, 2023050799. https://doi.org/10.20944/preprints202305.0799.v1

Abstract

Inscription of embedded photoluminescent microbits inside a bulk natural diamond, LiF and CaF2 crystals was performed in sub-filamentation (geometrical focusing) regime by 525nm 0.2ps laser pulses focused by 0.65NA micro-objective as a function of pulse energy, exposure and inter-layer separation. The resulting microbits were visualized by 3Dscanning confocal Raman/photoluminescence microscopy as conglomerates of photo-induced quasi-molecular color centers and tested regarding their annealing. Minimal lateral and longitudinal microbit separations, enabling their robust read-out, were measured in LiF as 1.5 and 13 microns, respectively, to be improved regarding information storage capacity by more elaborate focusing systems. These findings pave a way to novel optical storage platforms utilizing ultrashort-pulse laser inscription of photoluminescent microbits as carriers of archival memory.

Keywords

fluorides; diamond; ultrashort-pulse laser; direct laser inscription; photoluminescent microbits; vacancy clusters

Subject

Physical Sciences, Optics and Photonics

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