مشخصات پژوهش

In this work, we present an enhanced nano-optical tweezers based on the new triple-nanoaperture structure for trapping nanoparticles using low power laser. Diferent structures with a single, double and triple-nanoaperture with nanometer gap created in 65 nm gold flm, are examined. The results show there is a several times enhancement in transmission coefcient for proposed triple-nanoaperture based design. Considering this structure, the geometrical parameters like radius (R), center-to-center distance (D) and confguration of aperture have been manipulated to achieve optimum design. Using optimized parameters both transmission and optical force calculated and compared with the original structure which uses a single aperture. The results show total optical force inserted to 30 nm nanoparticle, enhanced up to 20 times as compared with the original structure. This structure and related results can be used to design new enhanced nano-optical tweezers with high accuracy for diferent applications.