پژوهش های نوین فیزیک

بررسی اثر حلال در پاسخهای غیرخطی آزو دای Disperse Red 1

نویسنده

سمیه سلمانی شیک

دانشگاه خوارزمی

https://doi.org/10.61882/jmrph.9.1.18
چکیده
در این پژوهش، اثرات قطب حلالهای مختلف بر روی پاسخهای غیرخطی رنگدانه آلی آزو دای با نام تجاری Disperse Red 1 با روش جاروب-z تحت تایش لیزر با طول موج 532 نانومتر مورد بررسی قرار گرفت . ضریب شکست و جذب غیرخطی DR1، توسط این چیدمان در حضور حلال های مختلف به دست آمد. نتایج آزمایشگاهی نشان داد که پاسخ غیرخطی بسیار به محیط مولکولی اطراف رنگدانه و برهم کنشهای بین مولکولی آنها بستگی دارد. از آنجایی که، الکل ها، در حلالهای مورد مطالعه دارای خاصیت نظم دهی بیشتری می باشند، با افزایش ضریب دی الکتریک مقدار ضریب شکست غیرخطی کاهش می یابد اما در مورد بقیه حلالها که خاصیت نظم دهی کمتری دارند، مقدار ضریب شکست غیرخطی با افزایش ضریب دی الکتریک افزایش می یابد. ضریب شکست به دست آمده با علامت منفی و از مرتبه 10-7 cm2/W می باشد که نشان دهنده خاصیت خودواکانونی رنگدانه آلی در حضور حلالهای متفاوت می باشد.

کلیدواژه‌ها

آزو دای
اثر حلال
پاسخ های غیرخطی
جاروب -z

عنوان مقاله English

Solvent Effect Investigation on Nonlinear Responses of an Azo-dye: Disperse Red 1

نویسنده English

Somayeh Salmani Shik
Kharazmi University
چکیده English

In this study, the solvent polarity effects on the nonlinear responses of the organic azo dye with the commercial name, Disperse Red 1, were investigated by the z-scan method under 532 nm laser irradiation. The nonlinear optical refraction and absorption were obtained for different solvents. The experimental results reveal that the nonlinear response is highly dependent on the molecular environment around the azo dye and its intermolecular interactions. Since alcohols have a higher order parameter, the nonlinear refraction and absorption decrease with increasing dielectric constant, but for other solvents with low order parameters, the nonlinear indexes increase with increasing dielectric constant. The refractive index is negative and in order of 10-7 cm2/W, which indicates that self-focusing occurs for different solvents.


کلیدواژه‌ها English

Azo dye
Solvent effect
Nonlinear responses
z-scan
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