تحريك كارآمد پلاسمون-پولاريتون هاي نشتي سطحي مبتني بر نوار طلا در ساختار كرشمن

Efficient Excitation of Stripe-based Leaky Surface Plasmon Polaritons in the Kretschmann Configuration

Recently leaky surface plasmon polaritons excited on top of a thin gold stripe, using the Kretschmann configuration, have attracted more attention due to the exciting possibilities in nano particle trapping, sensing and insitu monitoring applications. Here, a tapered stripe is proposed that can enhance the efficiency of photonplasmon coupling by gradually focusing the surface plasmon polaritons at the near end of the stripe. In this paper, using the three dimensional finite difference time domain numerical method 3DFDTD, effects of exciting and tapering angles on the excited modes are investigated. For example, Simulations predict that when the tapering angle is about 45° the maximum mode enhancement after prppagating 8µm along the stripe, is improved more than 60 percent as compared to the untapered structure. The proposed structure benefits from low power consumption and simply and inexpensively integration into labonachip devices. I believe these features can be used to enhance the efficiency of the Stripebased plasmonic optophoresis systems; introducing a promising candidate to develop integrated optical manipulation chips especially for biological applications.

Recently leaky surface plasmon polaritons excited on top of a thin gold stripe, using the Kretschmann configuration, have attracted more attention due to the exciting possibilities in nano particle trapping, sensing and insitu monitoring applications. Here, a tapered stripe is proposed that can enhance the efficiency of photonplasmon coupling by gradually focusing the surface plasmon polaritons at the near end of the stripe. In this paper, using the three dimensional finite difference time domain numerical method 3DFDTD, effects of exciting and tapering angles on the excited modes are investigated. For example, Simulations predict that when the tapering angle is about 45° the maximum mode enhancement after prppagating 8µm along the stripe, is improved more than 60 percent as compared to the untapered structure. The proposed structure benefits from low power consumption and simply and inexpensively integration into labonachip devices. I believe these features can be used to enhance the efficiency of the Stripebased plasmonic optophoresis systems; introducing a promising candidate to develop integrated optical manipulation chips especially for biological applications.