POLYMERS FOR PHOTONICS

1994 ◽  
Vol 03 (04) ◽  
pp. 531-541 ◽  
Author(s):  
P.N. PRASAD

Polymers have emerged as an important class of materials for applications in photon-ics. In this review, a brief background is presented on photonics and nonlinear optical processes, the latter providing many of the operational functions for the photonics technology. Nonlinear optical processes in polymeric materials are discussed along with the needed structural requirements. The three types of nonlinear polymeric systems discussed are: (i) χ(2) materials; (ii) χ(3) materials and (iii) photorefractive polymers. The photorefractive polymeric systems utilize the combined action of photoconductivity and nonlinear optical effect. New developments using sol-gel processed inorganic glass: polymer composites for nonlinear optics are discussed.

Author(s):  
Wan Ahmad Kamil Mahmood ◽  
Mohammad Hossein Azarian

Organic-Inorganic composite materials (OICs) are used to describe the group of materials synthesized from polymers and inorganic metal alkkoxides. The interests in these materials arised from the need to ‘combine' the physical properties of inorganic glass materials and polymers such that the resultant OICs have the strength of the inorganic glass and flexibiliy of polymeric materials. Sol-gel technique have been the technique of choice due to much of its advantages, in particular the low temperature reaction. This is very important when natural rubber and its derivatives are used as the polymer component of the OICs. Work in our laboratory has demonstrated that OICs form liquid natural rubber (LNR) and 50% epoxidised natural rubber (ENR-50) can be prepared from various metal alkoxides, such silicon, zirconium and titanium. The OICs can be prepared as flexible transparent films, nanofibers and nanobeads. This Chapter will describe the preparation techniques and the properties of these OICs from various compositions of one and more metal alkoxides in both LNR and ENR-50. The applications of these materials in PANI will be briefly described.


1993 ◽  
Vol 328 ◽  
Author(s):  
C. Y. Stacey Fu ◽  
Duane B. Prdddy ◽  
Greg D. Lyle ◽  
James E. Mcgrath ◽  
Hilary S. Lackritz

ABSTRACTA new class of high temperature polymeric materials capable of second order nonlinear optical effects has been developed and characterized. These polymers, Bisphenol A-poly (arylene ether) phosphine oxides (Bis A-PEPO), F6 Bis A-PEPO, phenolphthalein•PEPO (PP-PEPO), and phenolphthaIein-anilide•PEPO (PP-PEPO), doped with nonlinear optical chromophores are being examined using second harmonic generation. Corona poling is used to orient the chromophores into the noncentrosymmetric structure required to obtain the second harmonic signal. These high glass transition temperature (>200°C) polymers have strong hydrogen bonding sites that can interact with the chromophores. This work describes the basic polymer physics including local Mobility, chromophore/polymer interactions, and polymer steric effects that control the thermal and temporal stability of chromophore orientation in these guest-host polymeric systems.


1998 ◽  
Vol 10 (3) ◽  
pp. 705-709 ◽  
Author(s):  
Dong Hoon Choi ◽  
Ji Hye Park ◽  
Tae Hyung Rhee ◽  
Nakjoong Kim ◽  
Sin-Doo Lee

2002 ◽  
Vol 722 ◽  
Author(s):  
Ram W. Sabnis ◽  
Mary J. Spencer ◽  
Douglas J. Guerrero

AbstractNovel organic, polymeric materials and processes of depositing thin films on electronics substrates by chemical vapor deposition (CVD) have been developed and the lithographic behavior of photoresist coated over these CVD films at deep ultraviolet (DUV) wavelength has been evaluated. The specific monomers synthesized for DUV applications include [2.2](1,4)- naphthalenophane, [2.2](9,10)-anthracenophane and their derivatives which showed remarkable film uniformity on flat wafers and conformality over structured topography wafers, upon polymerization by CVD. The chemical, physical and optical properties of the deposited films have been characterized by measuring parameters such as thickness uniformity, solubility, conformality, adhesion to semiconductor substrates, ultraviolet-visible spectra, optical density, optical constants, defectivity, and resist compatibility. Scanning electron microscope (SEM) photos of cross-sectioned patterned wafers showed verticle profiles with no footing, standing waves or undercut. Resist profiles down to 0.10 νm dense lines and 0.09 νm isolated lines were achieved in initial tests. CVD coatings generated 96-100% conformal films, which is a substantial improvement over commercial spin-on polymeric systems. The light absorbing layers have high optical density at 248 nm and are therefore capable materials for DUV lithography applications. CVD is a potentially useful technology to extend lithography for sub-0.15 νm devices. These films have potential applications in microelectronics, optoelectronics and photonics.


1990 ◽  
Vol 101 (1) ◽  
pp. 141-142 ◽  
Author(s):  
Zhou Zonghua ◽  
Chen Debeng ◽  
Wang Xiu ◽  
Lai Deming

1991 ◽  
Vol 74 (1) ◽  
pp. 238-240 ◽  
Author(s):  
Masayuki Nogami ◽  
Yi-Qing Zhu ◽  
Yoshihide Tohyama ◽  
Katsumi Nagasaka ◽  
Takashi Tokizaki ◽  
...  

2017 ◽  
Vol 111 (16) ◽  
pp. 161103 ◽  
Author(s):  
Q. Zhang ◽  
X. M. Cheng ◽  
H. W. Chen ◽  
B. He ◽  
Z. Y. Ren ◽  
...  

Author(s):  
Elayne M. Thomas ◽  
Phong H. Nguyen ◽  
Seamus D. Jones ◽  
Michael L. Chabinyc ◽  
Rachel A. Segalman

Polymers that simultaneously transport electrons and ions are paramount to drive the technological advances necessary for next-generation electrochemical devices, including energy storage devices and bioelectronics. However, efforts to describe the motion of ions or electrons separately within polymeric systems become inaccurate when both species are present. Herein, we highlight the basic transport equations necessary to rationalize mixed transport and the multiscale materials properties that influence their transport coefficients. Potential figures of merit that enable a suitable performance benchmark in mixed conducting systems independent of end application are discussed. Practical design and implementation of mixed conducting polymers require an understanding of the evolving nature of structure and transport with ionic and electronic carrier density to capture the dynamic disorder inherent in polymeric materials. Expected final online publication date for the Annual Review of Materials Science, Volume 51 is July 2021. Please see http://www.annualreviews.org/page/journal/pubdates for revised estimates.


2012 ◽  
Vol 358 (6-7) ◽  
pp. 1003-1008 ◽  
Author(s):  
Rong Zhang ◽  
Shuhui Bo ◽  
Jialei Liu ◽  
Tingting Zhou ◽  
Ling Qiu ◽  
...  

Sign in / Sign up

Export Citation Format

Share Document