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Circuit model in design of THz transparent electrodes based on two-dimensional arrays of metallic square holes

Shirmanesh, G. K ; Sharif University of Technology

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  1. Type of Document: Article
  2. DOI: 10.1109/TTHZ.2014.2313956
  3. Abstract:
  4. In this paper, we propose a circuit model for two-dimensional arrays of metallic square holes located on a homogeneous substrate, in order to propose a new scheme containing this type of metamaterials to obtain transparent electrodes with simultaneous terahertz transparency and low electrical resistance. The results of the introduced circuit model, which is a fully analytical model with explicit expressions, are in almost complete agreement with the full-wave simulations. Thanks to this analytical model, we can employ standard binomial matching transformer in order to minimize the reflected power from the structure at a desired frequency. Furthermore, taking advantage of this model, we design an optimized tri-layer structure by seeking for a high optical transmittance at the desired frequency and over a wide bandwidth. The obtained transparent electrode has a high power transmission (more than 85%) within a wide frequency range (48% of the central frequency) which is desirable in commonly used transparent electrodes. The square holes are perforated in thick metallic slabs which drastically reduce the electrical resistance of the structure
  5. Keywords:
  6. Circuit model ; Transparent conductive electrodes (TCEs) ; Analytical models ; Circuit simulation ; Circuit theory ; Electric resistance ; Metamaterials ; Models ; Two dimensional ; Circuit modeling ; Full-wave simulations ; High power transmission ; Homogeneous substrates ; Transparent electrode ; Two-dimensional arrays ; Electrodes
  7. Source: IEEE Transactions on Terahertz Science and Technology ; Vol. 4, issue. 3 , April , 2014 , p. 383-390
  8. URL: http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=6797981