Computational Electromagnetics

Modeling optics (electromagnetic waves) with a finite element method has proven to be extremely accurate. We use this tool to help design and analyze plasmonic nanostructure. Recent developments in computational performance enables complex and robust calculations and modeling. Research in the area involves 3D designs and studies, and use of high performance super computing. Recent work has also been using a finite difference frequency domain model to compute photonic band gaps in 2D photonic crystals.

Video 1 - The electric field distribution of a nanowire as a function of nanowire width. From [7].

Figure 2 - Left: electric field distribution of triple nanowire cross-section with poynting vectors. Right: Finite element Meshing of 3D model. Adapted from [7]

Related work and further reading

[1] C. Saylor, E. C. Novak, D. T. Debu, and J. B. Herzog, "Investigation of maximum optical enhancement in single gold nanowires and triple nanowire arrays", Journal of Nanophotonics (accepted 2015) in press.

[2] S. J. Bauman, E. C. Novak, D. T. Debu, D. Natelson, and J. B. Herzog, "Fabrication of sub-lithography-limited structures via Nanomasking technique for plasmonic enhancement applications", IEEE Trans Nanotechnol 14 5 (2015).

[3] R. B. Abdulrahman, H. Cansizoglu, M. F. Cansizoglu, J. B Herzog, T. Karabacak, "Enhanced light trapping and plasmonic properties of aluminum nanorods fabricated by glancing angle deposition", JVST A 33 041501 (2015).

[4] A. I. Nusir, A. M. Hill, M. O. Manasreh, J. B. Herzog "Near-infrared metal-semiconductor-metal photodetector based on semi-insulating GaAs and interdigital electrodes", Photonics Research, Vol 3, 1 (2015).

[5] M. Sarollahi et al. The significance of the number of periods and period size in 2D photonic crystal waveguides, SPIE Optics + Photonics, (2015)

[6] C. Saylor et al. Investigation of Nanowire Thickness and Enhancement Characteristics, APS March Meeting (2015)

[7] E. Novak et al. Computational Electromagnetic Modeling of Optical Responses in Plasmonically Enhanced Nanoscale Devices Fabricated with Nanomasking Technique, APS March Meeting (2015)

[8] D. Debu et al. Investigation of nanogap localized field enhancement in gold plasmonic structures, APS March Meeting (2015)

[9] A. Hill et al. Computational electromagnetic analysis of plasmonic effects in interdigital photodetectors, SPIE Optics + Photonics (2014)

Figure 1 Electric field distribution of the cross section of a gold nanowire. Different figures show results for nanowires with various thicknesses. Adapted from [1]

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Last Update: Fall 2013