1 Institute of Sensors, Signals and Electrotechnics, Faculty of Engineering, SDU2 Faculty of Engineering, SDU3 unknown4 Institute of Technology and Innovation, Faculty of Engineering, SDU5 Institute of Technology and Innovation, Faculty of Engineering, SDU
Analysis and Demonstration
Resonant scattering by gold nanostrip antennas due to constructive interference of counterpropagating slow surface plasmon polaritons SPPs is analyzed, including the quasistatic limit of ultrasmall antennas, and experimentally demonstrated. The phase of slow SPP reflection by strip ends is found from scattering spectra revealing the influence of non-SPP field components. Experimental scattering spectra of gold 17- and 23-nm-thin strips of 100-500 nm widths placed on quartz and covered with index-matching oil are in excellent agreement with theoretical predictions.
Physical Review B. Condensed Matter and Materials Physics, 2008, Vol 77, Issue 11