Nano-Optical Couplers for Efficient Power Transmission Along Sharply Bended Nanowires
Keywords:Nano-Optical Couplers, Efficient Power Transmission
We consider nano-optical couplers that consist of optimal arrangements of nanoparticles to improve the transmission abilities of nanowire systems with sharp bends. Previously, it was shown that absence/existence of nanoparticles in a given grid can be optimized such that the power transmission can significantly be increased without curving the bend. In this contribution, we present a detailed investigation and analysis of coupler performances to critical geometric parameters. While the designed couplers are robust against fabrication errors, numerical results demonstrate a remarkable dependency of coupler characteristics to particle types, as well as to bending geometry, due to strong plasmonic interactions at short distances. These findings further support the need for case-dependent optimization that must be performed efficiently and accurately via full-wave simulations.
X. Wang, C. J. Summers, and Z. L. Wang, “Large-scale hexagonalpatterned growth of aligned ZnO nanorods for nano-optoelectronics and nanosensor arrays,” Nano Lett., vol. 4, no. 3, pp. 423–426, Jan. 2004.
A. W. Sanders, et al., “Observation of plasmon propagation, redirection, and fan-out in silver nanowires,” Nano Lett., vol. 6, no. 8, pp. 1822– 1826, Jun. 2006.
W. Wang, et al., “Light propagation in curved silver nanowire plasmonic waveguides,” Nano Lett., vol. 11, no. 4, pp. 1603–1608, Mar. 2011.
S. M. Bergin, et al., “The effect of nanowire length and diameter on the properties of transparent, conducting nanowire films,” Nanoscale, vol. 4, no. 6, pp. 1996–2004, Feb. 2012.
Y. Huang, et al., “Nanowire-supported plasmonic waveguide for remote excitation of surface-enhanced Raman scattering,” Light: Science and Applications, vol. 3, no. 199, Aug. 2014.
H. A. S¸ atana, B. Karaosmanoglu, and ˘ O. Erg ¨ ul, “A comparative study ¨ of nanowire arrays for maximum power transmission,” in Nanowires, K. Maaz, Ed. InTech, 2017.
Y. E. Tunc¸yurek, B. Karaosmano ¨ glu, and ˘ O. Erg ¨ ul, “Computational ¨ design of optical couplers for bended nanowire transmission lines,” ACES J., vol. 32, no. 7, pp. 562–568, Jul. 2017.
O. Erg ¨ ul and L. G ¨ urel, The Multilevel Fast Multipole Algorithm ¨ (MLFMA) for Solving Large-Scale Computational Electromagnetics Problems. Wiley-IEEE, 2014.
O. Erg ¨ ul and L. G ¨ urel, “Comparison of integral-equation formulations ¨ for the fast and accurate solution of scattering problems involving dielectric objects with the multilevel fast multipole algorithm,” IEEE Trans. Antennas Propag., vol. 57, no. 1, pp. 176–187, Jan. 2009.
M. G. Araujo, et al., “Comparison of surface integral equation formulations for electromagnetic analysis of plasmonic nanoscatterers,” Opt. Exp., vol. 20, no. 8, pp. 9161–9171, Apr. 2012.
D. M. Solis, J. M. Taboada, and F. Obelleiro, “Surface integral equation method of moments with multiregion basis functions applied to plasmonics,” IEEE Trans. Antennas Propag., vol. 63, no. 5, pp. 2141–2152, May 2015.
P. Yla-Oijala, M. Taskinen, and S. J ¨ arvenp ¨ a¨a, “Surface integral equa- ¨ tion formulations for solving electromagnetic scattering problems with iterative methods,” Radio Sci., vol. 40, no. 6002, Dec. 2005.
B. Karaosmanoglu, A. Yılmaz, and ˘ O. Erg ¨ ul, “A comparative study of ¨ surface integral equations for accurate and efficient analysis of plasmonic structures,” IEEE Trans. Antennas Propag., vol. 65, no. 6, pp. 3049– 3057, Jun. 2017.
P. B. Johnson and R. W. Christy, “Optical constants of the noble metals,” Phys. Rev. B, vol. 6, no. 12, pp. 4370–4379, Dec. 1972.
B. Karaosmanoglu, et al., “Solutions of plasmonic structures using the ˘ multilevel fast multipole algorithm,” Special Issue on Challenges in RF and Microwave Defense Engineering, Int. J. RF Microwave Comput.- Aided. Eng., vol. 26, no. 4, pp. 335–341, May 2016.
C. Onol, A. ¨ Uc¸ ¨ unc ¨ u, and ¨ O. Erg ¨ ul, “Efficient multilayer iterative ¨ solutions of electromagnetic problems using approximate forms of the multilevel fast multipole algorithm,” IEEE Antennas Wireless Propag. Lett., vol. 16, pp. 3253–3256, 2017.