Ab Initio Calculation of the Electronic Spectrum of Azobenzene Dyes and Its Impact on the Design of Optical Data Storage Materials

2000 ◽  
Vol 122 (14) ◽  
pp. 3482-3487 ◽  
Author(s):  
Per-Olof Åstrand ◽  
P. S. Ramanujam ◽  
Søren Hvilsted ◽  
Keld L. Bak ◽  
Stephan P. A. Sauer
Keyword(s):  
Ab Initio ◽  
Electronic Spectrum ◽  
Data Storage ◽  
Ab Initio Calculation ◽  
Optical Data Storage ◽  
Optical Data ◽  
Storage Materials ◽  
Data Storage Materials

scholarly journals Chemical characterization of optical data storage materials by EPMA

2002 ◽  
Vol 8 (S02) ◽  
pp. 1488-1489
Author(s):  
S. Richter ◽  
M. Bückins ◽  
S. Kyrsta ◽  
R. Cremer
Keyword(s):  
Data Storage ◽  
Chemical Characterization ◽  
Optical Data Storage ◽  
Optical Data ◽  
Storage Materials ◽  
Data Storage Materials

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.

Five-membered rings as diazo components in optical data storage devices: an ab initio investigation of the lowest singlet excitation energies

2000 ◽  
Vol 325 (1-3) ◽  
pp. 115-119 ◽  
Author(s):  
Per-Olof Åstrand ◽  
Peter Sommer-Larsen ◽  
Søren Hvilsted ◽  
P.S Ramanujam ◽  
Keld L Bak ◽  
...  
Keyword(s):  
Ab Initio ◽  
Data Storage ◽  
Optical Data Storage ◽  
Optical Data ◽  
Excitation Energies ◽  
Storage Devices

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.

scholarly journals Optical Isomerization and Photo-Patternable Properties of GeO2/Ormosils Organic-Inorganic Composite Films Doped with Azobenzene

Coatings ◽  
2021 ◽  
Vol 11 (7) ◽  
pp. 818
Author(s):  
Xuehua Zhang ◽  
Qian Wang ◽  
Shun Liu ◽  
Wei Zhang ◽  
Fangren Hu ◽  
...  
Keyword(s):  
Optical Waveguide ◽  
Data Storage ◽  
Optical Switching ◽  
Sol Gel ◽  
Composite Films ◽  
Optical Data Storage ◽  
Optical Data ◽  
Single Chip ◽  
Coating Method ◽  
Inorganic Composite

GeO2/organically modified silane (ormosils) organic-inorganic composite films containing azobenzene were prepared by combining sol-gel technology and spin coating method. Optical waveguide properties including the refractive index and thickness of the composite films were characterized by using a prism coupling instrument. Surface morphology and photochemical properties of the composite films were investigated by atomic force microscope and Fourier transform infrared spectrometer. Results indicate that the composite films have smooth and neat surface, and excellent optical waveguide performance. Photo-isomerization properties of the composite films were studied by using a UV–Vis spectrophotometer. Optical switching performance of the composite films was also studied under the alternating exposure of 365 nm ultraviolet light and 410 nm visible light. Finally, strip waveguides and microlens arrays were built in the composite films through a UV soft imprint technique. Based on the above results, we believe that the prepared composite films are promising candidates for micro-nano optics and photonic applications, which would allow directly integrating the optical data storage and optical switching devices onto a single chip.

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