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Asadnia Fard Jahromi M, Zangeneh H R. Optical transmission enhancement through a nanoslit with a single nanoantenna cavity. ICOP & ICPET _ INPC _ ICOFS 2014; 20 :881-884
URL: http://opsi.ir/article-1-354-en.html
URL: http://opsi.ir/article-1-354-en.html
1- University of Kashan
Abstract: (4078 Views)
- We have numerically showed that the extraordinary optical transmission of light through a vertical nanoslit in a metal film can be enhanced by replacing the slit with an array of slits. A nanoantenna cavity is formed by a nearby metallic nano-strip over the nano-slits. Using finite difference time domain (FDTD) method, we have studied the transmission properties of the proposed structure. It is shown that in a well chosen geometric condition the optimized cavity antenna can enhance greatly the transmission of light through a lateral nano-slit (about 5.3 times). The transmission spectrum of the structure can be tuned by adjusting the size or the distance between the lateral nano-slits as well. Such structure has promising applications in designing optical nano-scale devices.
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