scholarly journals A Review on Physical and Optical Properties of Zinc Tellurite Glasses Co-doped with different rare earth ions

2021 ◽  
Vol 33 (6) ◽  
pp. 48-56
Author(s):  
SUKHDEV BAIRAGI ◽  
◽  
GHIZAL F. ANSAR ◽  
Keyword(s):  
Optical Properties ◽  
Rare Earth ◽  
Data Storage ◽  
Optical Data Storage ◽  
Rare Earth Ions ◽  
Optical Data ◽  
Tellurite Glasses ◽  
X Ray Diffraction ◽  
Fibre Amplifier ◽  
Co Doped

In this work we review the effect of physical and optical properties with different ion zinc contents of tellurite base glass. The physical properties of the glasses were evaluated and the change in density, molar volume and ionic packing density in these glasses indicates the effect of ZnO different content show on the glasses structure. The study of optical properties such as the optical band gap and refractive index of zinc tellurite glass were studied. Zinc Tellurite glasses doped with Er3+ ions were synthesized by varies researcher. The glasses were characterized by X- ray diffraction, optical absorption and photoluminescence spectra. The glassy nature of zinc Tellurite host glass has been confirmed through XRD measurements. The glasses doped or co-doped with rare-earth ions have generated much interest due to the possibility of several promising applications such as optical data storage, visible laser, fibre amplifier, optical communication and sensor devices

scholarly journals Reversible 3D optical data storage and information encryption in photo-modulated transparent glass medium

2021 ◽  
Vol 10 (1) ◽  
Author(s):  
Zhen Hu ◽  
Xiongjian Huang ◽  
Zhengwen Yang ◽  
Jianbei Qiu ◽  
Zhiguo Song ◽  
...  
Keyword(s):  
Rare Earth ◽  
Data Storage ◽  
Optical Data Storage ◽  
Rare Earth Ions ◽  
Blue Laser ◽  
Information Storage ◽  
Optical Data ◽  
Optical Information ◽  
Transparent Glass ◽  
Optical Information Storage

AbstractTransparent glass has been identified as a vital medium for three-dimensional (3D) optical information storage and multi-level encryption. However, it has remained a challenge for directly writing 3D patterning inside a transparent glass using semiconductor blue laser instead of high-cost femtosecond laser. Here, we demonstrate that rare earth ions doped transparent glass can be used as 3D optical information storage and data encryption medium based on their reversible transmittance and photoluminescence manipulation. The color of tungsten phosphate glass doped with rare earth ions change reversibly from light yellow to blue upon alternating 473 nm laser illumination and temperature stimulation, resulting in the reversible luminescence modulation. The information data could be repeatedly written and erased in arbitrary 3D space of transparent glass, not only showing the ability of the excellent reproducibility and storage capacity, but also opening opportunities in information security. The present work expands the application fields of luminescent glass, and it is conducive to develop a novel 3D data storage and information encryption media.

scholarly journals Structural and optical properties of amorphous Si–Ge–Te thin films prepared by combinatorial sputtering

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
C. Mihai ◽  
F. Sava ◽  
I. D. Simandan ◽  
A. C. Galca ◽  
I. Burducea ◽  
...  
Keyword(s):  
Optical Properties ◽  
Data Storage ◽  
Optical Sensors ◽  
Material Selection ◽  
Functional Materials ◽  
Stability Study ◽  
Optical Data Storage ◽  
Optical Data ◽  
Structural And Optical Properties ◽  
Topological Constraint

AbstractThe lack of order in amorphous chalcogenides offers them novel properties but also adds increased challenges in the discovery and design of advanced functional materials. The amorphous compositions in the Si–Ge–Te system are of interest for many applications such as optical data storage, optical sensors and Ovonic threshold switches. But an extended exploration of this system is still missing. In this study, magnetron co-sputtering is used for the combinatorial synthesis of thin film libraries, outside the glass formation domain. Compositional, structural and optical properties are investigated and discussed in the framework of topological constraint theory. The materials in the library are classified as stressed-rigid amorphous networks. The bandgap is heavily influenced by the Te content while the near-IR refractive index dependence on Ge concentration shows a minimum, which could be exploited in applications. A transition from a disordered to a more ordered amorphous network at 60 at% Te, is observed. The thermal stability study shows that the formed crystalline phases are dictated by the concentration of Ge and Te. New amorphous compositions in the Si–Ge–Te system were found and their properties explored, thus enabling an informed and rapid material selection and design for applications.

Nondestructive up-conversion readout in Er/Yb co-doped Na0.5Bi2.5Nb2O9-based optical storage materials for optical data storage device applications

2017 ◽  
Vol 5 (15) ◽  
pp. 3838-3847 ◽  
Author(s):  
Qiwei Zhang ◽  
Shuangshuang Yue ◽  
Haiqin Sun ◽  
Xusheng Wang ◽  
Xihong Hao ◽  
...  
Keyword(s):  
Data Storage ◽  
Optical Data Storage ◽  
Photon Absorption ◽  
Optical Data ◽  
Storage Device ◽  
Two Photon Absorption ◽  
Two Photon ◽  
Device Applications ◽  
Co Doped ◽  
Absorption Mode

Er/Yb co-doped NBN photochromics exhibit excellent luminescence readout capability by using a two-photon absorption mode with extremely low destruction on information recording.

Optical properties of oxide glasses with semiconductor nanoparticles co-doped with rare earth ions

2013 ◽  
Vol 588 ◽  
pp. 188-192 ◽  
Author(s):  
M.C. Neto ◽  
G.H. Silva ◽  
A.P. Carmo ◽  
A.S. Pinheiro ◽  
N.O. Dantas ◽  
...  
Keyword(s):  
Optical Properties ◽  
Rare Earth ◽  
Semiconductor Nanoparticles ◽  
Rare Earth Ions ◽  
Oxide Glasses ◽  
Co Doped

Ion-Assisted Deposition of Protective Overlayers for Magneto-Optic Alloys

1988 ◽  
Vol 128 ◽  
Author(s):  
Kenneth D. Cornett ◽  
Ursula J. Gibson ◽  
Anthony Taylor
Keyword(s):  
Rare Earth ◽  
Data Storage ◽  
Optical Data Storage ◽  
Optical Data ◽  
Iron Films ◽  
Transition Metal Alloys ◽  
Refractory Oxides ◽  
Porous Microstructure ◽  
Data Storage Materials ◽  
Magneto Optic

ABSTRACTRare-Earth Transition-Metal alloys such as Tb-Fe-Co are being studied and used as magneto-optic data storage materials. These materials are susceptible to oxidation by either oxygen or water vapor, particularly the rare earth component. Pitting corrosion is also a problem when protective overlayers have pinholes or a porous microstructure. Both degradation mechanisms are significant for application of this material to optical data storage. We have used ion assisted deposition (IAD) to produce protective overlayers of refractory oxides, such as Al2O2 and ZrO2. These layers were deposited both with and without IAD onto iron films and exposed to environments with controlled temperature and humidity. A scanning micro-reflectometer capable of detecting micrometer-sized pinholes was used to monitor the degradation of the iron layer with exposure time.

Development of An On-Chip Semiconducting Readout For Subsurface Optical Data

2002 ◽  
Vol 744 ◽  
Author(s):  
William K. Loghry ◽  
N. J. Ianno ◽  
R. O. Dillon
Keyword(s):  
Data Storage ◽  
Indium Tin Oxide ◽  
Optical Filter ◽  
Optical Data Storage ◽  
Optical Data ◽  
X Ray Diffraction ◽  
X Ray ◽  
Broadband Light Source ◽  
On Chip ◽  
Device Operation

ABSTRACTA preliminary device was investigated as a first step in making an on-chip electrical readout based on the semiconductor CdS for a novel 3-D optical data storage method. The optical data is stored in glass as subsurface nanometer size defects called voxels. These voxels display secondary harmonic generation (SHG) to 800 nm input light. The device begins with an indium tin oxide film on a glass substrate coated with a film of Al2O3. In this preliminary device the Al2O3 was patterned via optical lithography with a periodic array of 10 micron holes that were filled with electrodeposited CdS. X-ray diffraction, and energy dispersive X-ray analysis were used to characterize the CdS. The device operation depends on the ability of the CdS with a bandgap of 2.4 eV to detect the 3.1 eV SHG light from the voxels while remaining unresponsive to 1.6 eV input light. The electrodeposited CdS was found to absorb 400 nm light at least a factor of 10 times greater than 800 nm light. Light to dark photocurrent ratios of 15 to 63 were observed from the CdS pillars using a 150 W xenon broadband light source. A light to dark ratio of about one was found when a long pass optical filter allowed only wavelengths above 750 nm. Thus the 10 micron CdS pillars have detected 400 nm light while rejecting the 800 nm input light.

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