Iftikhar Ahmed

Publications (2)4.2 Total impact

• Article: Electromagnetic wave propagation in a Ag nanoparticle-based plasmonic power divider.

  Iftikhar Ahmed, Ching Eng Png, Er-Ping Li, Rüdiger Vahldieck
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  ABSTRACT: In this paper a new silver (Ag) nanoparticle-based structure is presented which shows potential as a device for front end applications, in nano-interconnects or power dividers. A novel oxide bar ensures waveguiding and control of the signal strength with promising results. The structure is simulated by the two dimensional finite difference time domain (FDTD) method considering TM polarization and the Drude model. The effect of different wavelengths, material loss, gaps and particle sizes on the overall performance is discussed. It is found that the maximum signal strength remains along the Ag metallic nanoparticles and can be guided to targeted end points.
  Optics Express 02/2009; 17(1):337-45. · 3.59 Impact Factor
• Article: Convolutional perfectly matched layer for weakly conditionally stable hybrid implicit and explicit‐FDTD method

  Iftikhar Ahmed, Er‐Ping Li
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  ABSTRACT: In this article, we developed and implemented the convolutional perfectly matched layer (CPML) for the hybrid implicit explicit finite-difference time-domain (HIE-FDTD) method. The method is validated against the conventional FDTD-PML method and is found promising. The development of CPML is able to extend the HIE-FDTD to open surface problems, which works at higher CFL numbers in comparing to the conventional FDTD method. © 2007 Wiley Periodicals, Inc. Microwave Opt Technol Lett 49: 3106–3109, 2007; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.22962
  Microwave and Optical Technology Letters 11/2007; 49(12):3106 - 3109. · 0.62 Impact Factor