TY - JOUR T1 - Optical transmission enhancement through a nanoslit with a single nanoantenna cavity TT - Optical transmission enhancement through a nanoslit with a single nanoantenna cavity JF - opsi JO - opsi VL - 20 IS - 0 UR - http://opsi.ir/article-1-354-fa.html Y1 - 2014 SP - 881 EP - 884 KW - plasmonic waves KW - integrated optics KW - waveguide. N2 - - 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. M3 ER -