Optics and Photonics Society of Iran

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In this paper, a photonic crystal fiber with a suspended elliptic core with slotted air holes is designed for the efficient propagation of Terahertz waves. The proposed configuration leads to a high birefringence, a low loss, and a flat dispersion. The simulation results show that this PCF exhibits an ultrahigh birefringence value of 0.12, a low effective material loss of 0.2〖cm^(-1)〗and 0.08〖cm^(-1)〗and very negligible confinement loss of 10^(-5) 〖cm^(-1)〗and 10^(-3) 〖cm^(-1)〗at 0.8 THz for the X-polarized and Y-polarized modes, respectively. Moreover, the suggested structure provides a very flat dispersion of 0.1±0.1 ps/THz/cm and 0.15±0.15 ps/THz/cm over the frequency range of 1.2 to 1.4 THz for two x and y polarized states, respectively. We believe that our proposed PCF will bring about a promising improvement in polarization-maintaining applications at THz frequencies.

Keywords: Birefringence, confinement loss (CL), effective material loss (EML), photonic crystal fiber (PCF), terahertz

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