Azo-dye-doped cellulose acetate for optical data storage and processing

1998 ◽  
Author(s):  
Rouslan Birabassov ◽  
Tigran V. Galstian ◽  
F. Dechamplain ◽  
Anna-Marie R. Ritcey
Keyword(s):  
Cellulose Acetate ◽  
Data Storage ◽  
Azo Dye ◽  
Optical Data Storage ◽  
Optical Data

scholarly journals Kinematics of Photoisomerization Processes of PMMA-BDK-MR Polymer Composite Thin Films

Polymers ◽  
2020 ◽  
Vol 12 (6) ◽  
pp. 1275 ◽  
Author(s):  
Qais M. Al-Bataineh ◽  
A. A. Ahmad ◽  
A. M. Alsaad ◽  
I. A. Qattan ◽  
Areen A. Bani-Salameh ◽  
...  
Keyword(s):  
Thin Films ◽  
Polymer Composite ◽  
Data Storage ◽  
Azo Dye ◽  
Uv Light ◽  
Optical Data Storage ◽  
Optical Data ◽  
Hysteresis Cycle ◽  
Composite Thin Films ◽  
Vis Spectroscopy

We investigate and report on the kinematics of photoisomerization processes of polymer composite thin films based on azo dye methyl red (MR) hosted in polymethylmethacrylate (PMMA) incorporated with Benzyl dimethyl ketal (BDK) as a photo-initiator. Understanding photoisomerization mechanisms is crucial for several optical applications such as Read/Write/Erase (WRE) optical data storage media, UV light Read/Write heads, and UV light sensors. The as-prepared polymer composite thin films are characterized using UV–Vis spectroscopy. Furthermore, Fourier transform infrared spectroscopy (FTIR) and scanning electron microscope (SEM) are employed to investigate the optical, chemical, and morphological properties of trans- and cis-states of PMMA-BDK-MR polymer composite thin films. The presence of the azo dye MR in the composite is essential for the efficient performance of the cis ↔ trans cycles through illumination ↔ thermal relaxation for Write/Read/Erase optical data storage and UV-light sensors. Moreover, UV–Vis and FTIR results confirm the hysteresis cycle of trans- and cis-states and that PMMA-BDK-MR thin films may be regarded as potential candidates for successful Write/Read/Erase optical data storage and UV-light sensors. In addition, the morphology of the thin film surface is investigated by SEM technique. The SEM images indicate that uncured surfaces of PMMA-BDK-MR thin films are inhomogeneous compared with the corresponding surfaces after curing. The transformation from inhomogeneous surfaces to homogeneous surfaces is attributed to the polymerization of thin films by UV curing.

Azo dye based poly(alkyloxymethacrylate)s and their spacer effect on optical data storage

2007 ◽  
Vol 19 (11) ◽  
pp. 1045-1053 ◽  
Author(s):  
S. Manickasundaram ◽  
P. Kannan ◽  
Q. M. A. Hassan ◽  
P. K. Palanisamy
Keyword(s):  
Data Storage ◽  
Azo Dye ◽  
Optical Data Storage ◽  
Optical Data

Novel Azo Dye-Doped Poly(Methyl Methacrylate) Films as Optical Data Storage Media

1997 ◽  
Vol 36 (Part 1, No. 1B) ◽  
pp. 429-438 ◽  
Author(s):  
Vinh Phuc Pham ◽  
Tigran Galstyan ◽  
André Granger ◽  
Roger A. Lessard
Keyword(s):  
Methyl Methacrylate ◽  
Data Storage ◽  
Azo Dye ◽  
Optical Data Storage ◽  
Optical Data ◽  
Poly Methyl Methacrylate ◽  
Storage 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.

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.

Sign in / Sign up

Export Citation Format

Share Document