CORONA-POLED NONLINEAR POLYMERIC FILMS: IN SITU ELECTRIC FIELD MEASUREMENT, CHARACTERIZATION AND ULTRASHORT-PULSE APPLICATIONS

1992 ◽  
Vol 01 (01) ◽  
pp. 73-102 ◽  
Author(s):  
A. KNOESEN ◽  
N.E. MOLAU ◽  
D.R. YANKELEVICH ◽  
M.A. MORTAZAVI ◽  
A. DIENES
Keyword(s):  
Thin Films ◽  
Electric Field ◽  
Ultrashort Pulse ◽  
Elevated Temperatures ◽  
Orientational Order ◽  
Ultrashort Pulses ◽  
Second Order ◽  
Polymeric Films ◽  
Polymeric Thin Films ◽  
Corona Poling

Electric poling at field intensities approaching the dielectric strength of the film is possible with corona poling. Polymeric thin films with large second-order nonlinearities can be created with this poling technique. In this paper, the corona poling of nonlinear polymeric films at elevated temperatures, processing, characterization and possible ultrashort-pulse applications are reviewed. An experimental technique is presented to measure the electric field during poling of the nonlinear polymeric film. The characterization of orientational order in corona-poled nonlinear polymeric films and the effects associated with the large electric field during poling are discussed. Poled polymeric thin films are uniquely suited for second-order nonlinear optical applications of ultrashort pulses (< 50 fsec) since minimal pulse spreading occurs. The sum-frequency ultrashort-pulse application of nonlinear polymeric thin films and limitations of the thin polymeric films are discussed. Experimental results are presented of a side-chain nonlinear polymer that is ideally suited for ultrashort-pulse applications.

Photocross-Linked Second Order Nonlinear Optical Polymers

1990 ◽  
Vol 214 ◽  
Author(s):  
Y. M. Chen ◽  
B. K. Mandal ◽  
J. Y. Lee ◽  
P. Miller ◽  
J. Kumar ◽  
...  
Keyword(s):  
Thin Film ◽  
Thin Films ◽  
Nonlinear Optical ◽  
Nonlinear Coefficient ◽  
Second Order ◽  
Optical Polymers ◽  
Nlo Properties ◽  
Polymeric Thin Films ◽  
Nonlinear Optical Polymers ◽  
Novel Method

ABSTRACTWe report a novel method to obtain stable second order nonlinear optical (NLO) properties in polymeric thin films. Photocross-linking between the NLO active molecules and a photoreactive polymer is achieved by UV irradiation subsequent to poling. The thin film exhibits a nonlinear coefficient d33of 16.5 pm/V at a doping level of 20% by weight of NLO active molecules and possesses quite stable second order nonlinear optical properties

scholarly journals Large, Electric-Field Induced Tunable and Reversible χ(2) in PZT Thin Films for on-chip second-order nonlinearities

2021 ◽  
Author(s):  
Gilles F. Feutmba ◽  
Artur Hermans ◽  
John P. George ◽  
Irfan Ansari ◽  
Dries Van Thourhout ◽  
...  
Keyword(s):  
Thin Films ◽  
Electric Field ◽  
Second Order ◽  
Pzt Thin Films ◽  
Large Electric Field ◽  
On Chip

Characterizing the Viscoelastic Properties of Hydrogel Thin Films by Bulge Test

2017 ◽  
Vol 84 (6) ◽  
Author(s):  
Chen Yanfei ◽  
Ai Shigang ◽  
Tang Jingda ◽  
Pei Yongmao ◽  
Tang Liqun ◽  
...  
Keyword(s):  
Thin Films ◽  
Viscoelastic Properties ◽  
Polymeric Films ◽  
Poly Vinyl Alcohol ◽  
Bulge Test ◽  
Loading Conditions ◽  
Spherical Cap ◽  
Polymeric Thin Films ◽  
Step Loading ◽  
Constitutive Parameters

In this work, we carried out bulge test for quantifying the viscoelastic properties of poly (vinyl alcohol) (PVA) thin films with custom-developed apparatus. A viscoelastic bulge deformation (VBD) model based on the elasticity–viscoelasticity correspondence principle and spherical cap equation is established to describe the bulge deformation of polymeric thin films. The VBD model can be used to determine the time-dependent modulus by bulge test for polymeric films. Uniaxial compressive relaxation test and PRONY series fitting method are used to define the constitutive parameters of the VBD equations. We presented two types of VBD models in frequency domain under linear loading and step loading conditions. Through inverse Laplace transformation, the proposed VBD model can effectively predict the bulge deformation of PVA hydrogel thin film. Numerical simulations are also conducted to validate the VBD model under step loading conditions. This work provides a methodology to characterize the viscoelastic properties of polymeric films by bulge test.

Electrooptic Coefficients in Electric Field Poled Polymer Waveguides

1991 ◽  
Vol 228 ◽  
Author(s):  
Barton A. Smith ◽  
S. Herminghaus ◽  
J. D. Swalen
Keyword(s):  
Electric Field ◽  
Nonlinear Optical ◽  
Diglycidyl Ether ◽  
Expected Value ◽  
Second Order ◽  
Refractive Indices ◽  
Polymer Waveguides ◽  
Poled Polymer ◽  
Corona Poling

ABSTRACTPlanar wavcguides were made from a linear epoxy copolymer of bisphcnol-A diglycidyl ether and amino-nitro-tolanc. The refractive indices, ni-M and n-E, and the clectrooptic coeflicients, r33 and r13, of the poled nonlinear optical polymcr films were determined by measurements of the wavcguide modes of these films at a wavelength of 632.8nm, and the results arc reported for both electrode and corona poling. The ratio of the second order susceptibilities was found to exceed significantly the theoretically expected value of 3. Restricted motion of the nonlinear chromophorcs during poling provides a possible explanation of this discrepancy.

Harmonic generation with ultrashort pulses using nonlinear poled polymeric thin films

1989 ◽  
Vol 28 (16) ◽  
pp. 3278 ◽  
Author(s):  
M. A. Mortazavi ◽  
D. Yankelvich ◽  
Andrew Dienes ◽  
Andre Knoesen ◽  
S. T. Kowel ◽  
...  
Keyword(s):  
Thin Films ◽  
Harmonic Generation ◽  
Ultrashort Pulses ◽  
Polymeric Thin Films

Second‐order nonlinearity of nonpoled polymeric thin films doped with pyrylium salts with blue window characteristics

1996 ◽  
Vol 69 (19) ◽  
pp. 2813-2815 ◽  
Author(s):  
Hideki Nakayama ◽  
Ryoka Matsushima ◽  
Naomichi Okamoto ◽  
Atsushi Mizuno ◽  
Okihiro Sugihara ◽  
...  
Keyword(s):  
Thin Films ◽  
Second Order ◽  
Polymeric Thin Films ◽  
Pyrylium Salts ◽  
Second Order Nonlinearity

scholarly journals Cyclometalated Ir(III) Complexes with Curcuminoid Ligands as Active Second-Order NLO Chromophores and Building Blocks for SHG Polymeric Films

Inorganics ◽  
2020 ◽  
Vol 8 (5) ◽  
pp. 36
Author(s):  
Mattia Fontani ◽  
Alessia Colombo ◽  
Claudia Dragonetti ◽  
Stefania Righetto ◽  
Dominique Roberto ◽  
...  
Keyword(s):  
Electric Field ◽  
Second Harmonic ◽  
Organic Matrix ◽  
Building Blocks ◽  
Second Order ◽  
Polymeric Films ◽  
Ancillary Ligand ◽  
Nlo Properties ◽  
Nlo Response ◽  
Nlo Chromophores

The second-order nonlinear optical (NLO) properties of iridium(III) complexes having two cyclometalated 2-phenylpyridines and curcumin or tetrahydrocurcumin as ancillary ligand have been investigated both in solution and as guest in a polymeric organic matrix. In solution, these complexes are characterized by a significant second-order NLO response, as determined by the Electric Field Induced Second Harmonic (EFISH) technique, like the related complex with acetylacetonate. Whereas the low second-harmonic generation response of a composite film of [Ir(2-phenylpyridine)2(acetylacetonate)] in polymethyl methacrylate was not stable and fell down to zero upon turning off the electric field. A good and stable response was obtained with a film based on the iridium(III) complex bearing two cyclometalated 2-phenylpyridines and curcumin.

Polarized Fluorescence of Spin-coated Polymeric Thin Films

2007 ◽  
Vol 2 (2) ◽  
pp. 257-264
Author(s):  
Satoko Nishiyama ◽  
Masahiro Tajima ◽  
Yasuhiko Yoshida
Keyword(s):  
Thin Films ◽  
Polarized Fluorescence ◽  
Polymeric Thin Films
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