Novel hollow core asymmetric conjoined tube anti resonant fiber for low loss THz wave guidance
We report a novel hollow core asymmetric conjoined tube anti resonant (HC ACTAR) fiber for efficient and low loss THz wave guidance. The cladding tubes of the proposed HC ACTAR fiber is formed by conjoining a half circle and a half elliptical tube and is placed in the radial direction. We observe that the proposed fiber is superior in terms of achieving low loss and low dispersion in a wide range of frequencies than the previously reported designs. We show that our proposed HC ACTAR fiber ensures lowest loss of 0.034 dB/m at 1 THz and marinates a low loss window of 0.5 THz. Moreover, the proposed fiber has promising optical properties in the THz regime such as low bending loss, broadband flattened dispersion, and effective single mode guidance, which are essential for efficient THz wave guidance.