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

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

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.

Optical second order nonlinearity in ultraviolet poled chalcogenide thin films

2015 ◽  
Vol 44 (4) ◽  
pp. 417-422 ◽  
Author(s):  
Sunita Rani ◽  
Devendra Mohan ◽  
Anil Kumar ◽  
Rajesh Punia
Keyword(s):  
Thin Films ◽  
Second Order ◽  
Chalcogenide Thin Films ◽  
Second Order Nonlinearity

Nonlinear Analysis of Visual Evoked Potentials Elicited by Color Stimulation

1997 ◽  
Vol 36 (04/05) ◽  
pp. 315-318 ◽  
Author(s):  
K. Momose ◽  
K. Komiya ◽  
A. Uchiyama
Keyword(s):  
Visual System ◽  
Evoked Potentials ◽  
Visual Evoked Potentials ◽  
Normal Subjects ◽  
Second Order ◽  
First Order ◽  
The Relationship ◽  
Perceived Color ◽  
Second Order Nonlinearity ◽  
Visual Evoked

Abstract:The relationship between chromatically modulated stimuli and visual evoked potentials (VEPs) was considered. VEPs of normal subjects elicited by chromatically modulated stimuli were measured under several color adaptations, and their binary kernels were estimated. Up to the second-order, binary kernels obtained from VEPs were so characteristic that the VEP-chromatic modulation system showed second-order nonlinearity. First-order binary kernels depended on the color of the stimulus and adaptation, whereas second-order kernels showed almost no difference. This result indicates that the waveforms of first-order binary kernels reflect perceived color (hue). This supports the suggestion that kernels of VEPs include color responses, and could be used as a probe with which to examine the color visual system.

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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