کد مقاله کد نشریه سال انتشار مقاله انگلیسی ترجمه فارسی نسخه تمام متن
26284 43944 2016 5 صفحه PDF ندارد دانلود رایگان
عنوان انگلیسی مقاله
Nonlinear dynamics and optical power limiting of nanoseconds pulses in naphthalocyanines and phthalocyanines with central metals gallium and indium
ترجمه فارسی عنوان
پویایی غیر خطی و محدودیت قدرت نوری پالسهای نانوذره در نفتالایکیانین ها و فتالوسيانين ها با فلزات فلزي گاليوم و اينديوم
کلمات کلیدی
محدودیت نوری؛ نفتالوسیانین؛ فتالوسیانین؛ معادله سرعت؛ جذب اشباع معکوس
Optical limiting; Naphthalocyanine; Phthalocyanine; Rate equation; Reverse saturable absorption
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی بیو مهندسی (مهندسی زیستی)
چکیده انگلیسی


• We study the dynamical processes of nanoseconds lasers in naphthalocyanines and phthalocyanines.
• We provide theoretical evidences of the main mechanism of optical power limiting.
• The central metals play more important roles in the dynamical processes.
• The main reason is the central metals enhance the spin–orbit coupling.

The optical dynamics of octa-(4-tert-butylphenoxy) substituted naphthalocyanines and phthalocyanines with different central metals (Ga, In) were investigated for 532 nm–7 ns laser pulses. In this work, we used numerical theoretical method with two-dimensional paraxial field equation and rate equations solving by Crank–Nicholson method. A five-level model was proposed to simulate the dynamical processes and the prominent optical limiting mechanism with long pulses is the sequential (singlet–singlet) × (triplet–triplet) two-photon absorption. The theoretical results indicate that both naphthalocyanines and phthalocyanines exhibit good optical limiting performances, which is attributed mainly to the reverse saturable absorption mechanism. The naphthalocyanines with larger difference of absorption cross sections and faster rate of the intersystem crossing transition between triplet and singlet states exhibit better optical limiting behaviour.

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ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Photochemistry and Photobiology A: Chemistry - Volume 316, 1 February 2016, Pages 19–23
نویسندگان
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