Multilevel optical data storage in a Eu²⁺/Ho³⁺ doped Ba₂SiO₄ phosphor with linear mapping between ultraviolet excitation and a thermoluminescence/photostimulated luminescence response

Abstract

Persistent luminescence phosphors are regarded as one of the promising candidates for optical storage media. However, most optical storages using phosphors can only realize single-bit-data recording, limiting the storage capacity....

Ultra-high-resolution greyscale fluorescence images via UV-exposure of thin flexible phosphor films

“…Greyscale images have recently been demonstrated for advanced optical data storage studies. 10,12 Greyscale images were also recently demonstrated on Ba 2 SiO 4 :Eu 2+ /Ho 3+ phosphor films. This involved using a screen-printing technique for the photomask fabrication.…”

“…The demonstration involved UV irradiation for the write step followed by either near-infrared illumination or heating for the read-out. 12…”

“…The demonstration involved UV irradiation for the write step followed by either nearinfrared illumination or heating for the read-out. 12 In this paper we demonstrate an alternative technique which does not require thermal or NIR excitation and allows for the creation of ultra-high-resolution greyscale fluorescence images in BaFCl:Sm thin flexible films by UV activation and blue-violet read-out. This is the first demonstration of greyscale fluorescence images in matlockite phosphor films and the images exhibit state-of-the-art resolution.…”

Ambient light stimulation enabling intense and long-lasting ultraviolet-C persistent luminescence from Pr3+-doped YBO3 in bright environments

“…12–16 To date, PSL materials have been well studied and have great potential for exciting applications in many important fields owing to their unique luminescence characteristics, such as optical data storage, security encryption, biomedical science, etc. 17–24 On the other hand, current PSL materials still suffer from severe limitations for some practical applications, especially monochromatic light illumination is usually selected as the stimulus source to realize the absolute separation between the PSL signal and the excitation light source. Meanwhile, a dark environment is considered necessary to get rid of the distractions from polychromatic ambient light.…”

High charge carrier storage capacity and wide range X-rays to infrared photon sensing in LiLuGeO4:Bi3+,Ln3+ (Ln = Pr, Tb, or Dy) for anti-counterfeiting and information storage applications

“…Afterglow or storage phosphor is an inorganic compound that traps free electrons and holes in compound lattice defects after exposure to ionizing radiation or high energy photons such as 254 nm UV-light. [1][2][3][4][5] The stored charge carriers can later be excited to yield rapid photon emission by thermal, 6,7 optical, 8,9 or mechanical stimulation. [10][11][12] Because of this feature, storage phosphors have many promising applications in X-ray computed tomography (CT), 13 dosimeters for radiation detection, [14][15][16] information storage, 17,18 anti-counterfeiting, 19 and even exploring mechanoluminescence materials for smart compression force sensing.…”