Optically-Inscribed High Efficiency Diffraction Gratings in Azo Polymer Films.

1996 ◽  
Author(s):  
C. Barrett ◽  
A. Natansohn ◽  
P. Rochon
Keyword(s):  
Polymer Films ◽  
High Efficiency ◽  
Diffraction Gratings ◽  
Azo Polymer

Mechanism of Optically Inscribed High-Efficiency Diffraction Gratings in Azo Polymer Films

1996 ◽  
Vol 100 (21) ◽  
pp. 8836-8842 ◽  
Author(s):  
Christopher J. Barrett ◽  
Almeria L. Natansohn ◽  
Paul L. Rochon
Keyword(s):  
Polymer Films ◽  
High Efficiency ◽  
Diffraction Gratings ◽  
Azo Polymer

Nature-Inspired Quasicrystal SRG Using Fibonacci Sequences in Photo-Reconfiguration on Azo Polymer Films

2018 ◽  
Vol 26 (11) ◽  
pp. 1042-1047 ◽  
Author(s):  
Kang-Han Kim ◽  
Kuk Young Cho ◽  
Yong-Cheol Jeong
Keyword(s):  
Polymer Films ◽  
Azo Polymer ◽  
Fibonacci Sequences

scholarly journals Synthesis of highly efficient multilayer dielectric diffraction gratings for spectral combining of laser beams

2021 ◽  
pp. 200-209
Author(s):  
А.А. Петухов
Keyword(s):  
High Efficiency ◽  
Diffraction Order ◽  
Diffraction Gratings ◽  
Merit Function ◽  
Synthesis Problem ◽  
Laser Beams ◽  
Etch Depth ◽  
Technological Constraints ◽  
Scattering Matrix Method ◽  
Multilayer Dielectric

Статья посвящена синтезу многослойных диэлектрических отражательных дифракционных решеток, с высокой эффективностью обеспечивающих спектральное сложение пучков с различной длиной волны в заданном дифракционном порядке. Приводятся результаты решения задачи синтеза многослойных диэлектрических дифракционных решеток, обеспечивающих спектральное сложение в первом или минус первом порядке дифракции. Кроме того, решается задача синтеза для таких решеток с учетом возможных технологических ограничений на высоту профиля (глубину травления). Решение задачи синтеза проводится путем минимизации зависящего от параметров решетки целевого функционала методом Нелдера-Мида. Решение прямой задачи на каждом шаге минимизации осуществляется при помощи комбинации неполного метода Галеркина и метода матриц рассеяния. The paper is devoted to the synthesis of multilayer dielectric reflection diffraction gratings providing high-efficiency spectral combining of the beams with different wavelengths in a given diffraction order. The results are presented for solving the synthesis problems for multilayer dielectric diffraction gratings providing spectral combining in the first or minus first diffraction order. Besides, the synthesis problem for such gratings is solved with account taken of possible technological constraints imposed by the height of the grating profile (etch depth). The solution of the synthesis problem is obtained by means of Nelder-Mead minimization of the merit function depending on the grating parameters. At each minimization step the direct problem is solved using a combination of the incomplete Galerkin method and scattering matrix method.

Direct observation of athermal photofluidisation in azo-polymer films

Soft Matter ◽  
2014 ◽  
Vol 10 (26) ◽  
pp. 4640-4647 ◽  
Author(s):  
Nicolae Hurduc ◽  
Bogdan C. Donose ◽  
Alina Macovei ◽  
Cristina Paius ◽  
Constanta Ibanescu ◽  
...  
Keyword(s):  
Mass Transfer ◽  
Rheological Properties ◽  
Direct Observation ◽  
Polymer Films ◽  
Azo Polymer

Light induced fluidization of azopolysiloxane: exposure to 488 nm light generates instantaneous mass transfer as a result of trans–cis isomerization in azophenol polymers. Viscoelastic mapping confirms the changes of rheological properties upon exposure to the light.

A strong regioregularity effect in self-organizing conjugated polymer films and high-efficiency polythiophene:fullerene solar cells

2006 ◽  
Vol 5 (3) ◽  
pp. 197-203 ◽  
Author(s):  
Youngkyoo Kim ◽  
Steffan Cook ◽  
Sachetan M. Tuladhar ◽  
Stelios A. Choulis ◽  
Jenny Nelson ◽  
...  
Keyword(s):  
Solar Cells ◽  
Polymer Films ◽  
Conjugated Polymer ◽  
High Efficiency ◽  
Self Organizing

Surface-Initiated Mechanism for the Formation of Relief Gratings on Azo-Polymer Films

1998 ◽  
Vol 102 (31) ◽  
pp. 6064-6070 ◽  
Author(s):  
Nirmal K. Viswanathan ◽  
Srinivasan Balasubramanian ◽  
Lian Li ◽  
Jayant Kumar ◽  
Sukant K. Tripathy
Keyword(s):  
Polymer Films ◽  
Azo Polymer
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