کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1522029 995303 2014 4 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Effect of electron acceptor type on nonlinear optical absorption properties in the chiral polymers based on polybinaphthyls
ترجمه فارسی عنوان
اثر نوع گیرنده الکترون بر خواص جذب نوری غیرخطی در پلیمرهای کروی بر اساس پلی بینافیلها
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد مواد الکترونیکی، نوری و مغناطیسی
چکیده انگلیسی


• Two chiral polymers with different electron-acceptor hydroxyl and octoxy were studied at this article.
• When excited by 100 fs 800 nm laser pulses, the up-converted fluorescence were observed in two polymers.
• Under the excitation of 532 nm 38 ps pulse, two polymers presented different nonlinear absorption behavior.
• The ground-state absorption cross-section in polymer was observed to be enlarged about 10 times.

Nonlinear optical absorption properties of two chiral polybinaphthyls with the same backbone but different electron acceptor hydroxyl and octoxy were studied in tetrahydrofuran solution. When excited by 100 fs 800 nm laser pulses, the up-converted fluorescence were observed and the intensities related to the different input irradiances were measured to confirm the two-photon excited fluorescence. The two-photon absorption coefficients were obtained as 4.82 cm GW−1 and 12.36 cm GW−1 with 100 fs pulses at 800 nm for two polymers, respectively. Under the excitation of 532 nm 38 ps pulse, it was found that the polymer with the side-chain of hydroxyl showed saturable absorption while the polymer with the side-chain of octoxy presented reverse saturable absorption. Their different nonlinear absorption behavior resulted from the fact that the ground-state absorption cross-section in the latter polymer was about 10 times larger than that of the former polymer while the excited-state absorption cross-section represented similar.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Chemistry and Physics - Volume 145, Issue 3, 16 June 2014, Pages 446–449
نویسندگان
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