کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7224874 | 1470571 | 2018 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
A highly sensitive surface plasmon resonance biosensor using photonic crystal fiber filled with gold nanowire encircled by silicon lining
ترجمه فارسی عنوان
حسگر بی حس کننده رزونانس پلاسما با حساسیت بالا با استفاده از فیبر کریستال فوتونیک پر شده با نانوسیم طلایی که توسط پوشش سیلیکونی محاصره شده است
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کلمات کلیدی
الیاف کریستال فوتونی، رزونانس پلاسما سطحی، بیوسنسور، روش عنصر محدود
موضوعات مرتبط
مهندسی و علوم پایه
سایر رشته های مهندسی
مهندسی (عمومی)
چکیده انگلیسی
The proposed photonic crystal fiber structure senses small deviations in the refractive index of liquids by surface plasmon resonance phenomenon. The coupling of core guided mode to surface plasmon polariton modes is modulated by the analyte placed between the central core and gold nanowire. Numerical study on the sensor performance is executed using finite element method. A sensitivity of 2000Â nm/RIU is achievable for detection of liquids with refractive index greater than 1.37 and the sensor covers a wide sensing range from 1.37 to 1.45. Loss factors as high as 187.76Â dB/cm is achievable. The analysis on the influence of structural modifications such as increase and decrease of gold nanowire diameter on the sensing action is also carried out. Numerical results depict an increase in confinement loss factor as the gold diameter gets reduced and a shift towards longer wavelength. The analysis of the sensor performance is performed when the gold nanowire is coated with silicon and it reveals that the loss factor gets enhanced by three fold, from 115.88 to 360.81Â dB/cm for analyte refractive index of 1.4, as compared to without silicon coating due to the enhanced energy coupling between plasmon and core modes. The increased silicon thickness improves the sensitivity factor to 4000Â nm/RIU.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Optik - Volume 156, March 2018, Pages 112-120
Journal: Optik - Volume 156, March 2018, Pages 112-120
نویسندگان
S. Selvendran, A. Sivanantha Raja, S. Yogalakshmi,