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Volume 25 - ICOP & ICPET 2019
ICOP & ICPET _ INPC _ ICOFS 2019, 25 - ICOP & ICPET 2019: 677-680 |
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Saeidi F, Ghorbanzadeh M, Moravvej farshi M K. Plasmonic Sensor based on the Third Harmonic Generated by an Array of Gold Nano-apertures. ICOP & ICPET _ INPC _ ICOFS 2019; 25 :677-680
URL: http://opsi.ir/article-1-1899-en.html
URL: http://opsi.ir/article-1-1899-en.html
1- Faculty of Electrical and Computer Engineering, Nano Plsmo-Photonic Research Group, Tarbiat Modares University, P. O. Box 14115-194, Tehran 1411713116, Iran
2- Faculty of Electrical and Computer Engineering, Hakim Sabzevari University, P. O. Box 397, Sabzevar 9617976487, Iran.
2- Faculty of Electrical and Computer Engineering, Hakim Sabzevari University, P. O. Box 397, Sabzevar 9617976487, Iran.
Abstract: (1716 Views)
We are proposing a plasmonic sensor based on the third harmonic generation from an array of rectangular nano-apertures in a 100-nm thick gold film. In the proposed structure, using the Finite difference time domain method, we show that due to the nonlinearity of the patterned gold film the third harmonic can be generated when the magnitude of the incident source (λ=1570 nm) is more than 3.1×108 V/m. To investigate the sensibility of the proposed structure, we show that by varying the optical properties (refractive index) of the surrounding medium from 1 to 1.3, the relative output power of the generated third harmonic increases for about 12000 times, while for the same conditions the fundamental mode increases just about 50 times. The proposed sensor can be used as an integrated sensor especially for lab-on-a-chip applications.
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