naa a22 4500 510817432 CHVBK 20180411083515.0 cr unu---uuuuu 180411e20130601xx s 000 0 eng 10.1007/s11468-012-9471-0 doi (NATIONALLICENCE)springer-10.1007/s11468-012-9471-0 Coupled Mode Theory for Surface Plasmon Polariton Waveguides [Elektronische Daten] [Aning Ma, Yuee Li, Xiaoping Zhang] In allusion to special modes supported by surface plasmon polariton (SPP) waveguides, explicit expression for mode coupling coefficient which plays a central role in coupled mode theory is firstly redefined by adding the longitudinal electric field component. The mode coupling coefficients calculated by the proposed formula improve greatly compared with the coupled mode theory suited to conventional optical waveguides, and reasonable explanations from the point of view of physics and mathematics have been given. Afterwards, the coupling lengths, the transmission lengths, the normalized power exchanges, and the cross talk performances of adjacent parallel SPP waveguides with varying waveguide separation distances D and waveguide lengths L are investigated at telecom wavelength. The results are encouraging as they indicate that the coupled mode theory is developed in a self-consistent manner by retaining the longitudinal electric field component in the derivation and neglecting it only when the waveguides structure satisfies the weakly guiding situations. As a result, the new mode coupling coefficient formula for SPP waveguides considered in this paper is an important complement in the theory of SPP waveguides. Springer Science+Business Media New York, 2012 SPP waveguides nationallicence Coupled mode theory nationallicence Mode coupling coefficient nationallicence Cross talk performance nationallicence Integrated plasmonic circuits nationallicence Ma Aning School of Information Science and Engineering, Lanzhou University, 730000, Lanzhou, China aut Li Yuee School of Information Science and Engineering, Lanzhou University, 730000, Lanzhou, China aut Zhang Xiaoping School of Information Science and Engineering, Lanzhou University, 730000, Lanzhou, China aut Plasmonics Springer US; http://www.springer-ny.com 8/2(2013-06-01), 769-777 1557-1955 8:2<769 2013 8 11468 https://doi.org/10.1007/s11468-012-9471-0 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11468-012-9471-0 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Ma Aning School of Information Science and Engineering, Lanzhou University, 730000, Lanzhou, China aut NATIONALLICENCE 700 1- Li Yuee School of Information Science and Engineering, Lanzhou University, 730000, Lanzhou, China aut NATIONALLICENCE 700 1- Zhang Xiaoping School of Information Science and Engineering, Lanzhou University, 730000, Lanzhou, China aut NATIONALLICENCE 773 0- Plasmonics Springer US; http://www.springer-ny.com 8/2(2013-06-01), 769-777 1557-1955 8:2<769 2013 8 11468 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer