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A Simple Wideband Dual-Slotted Circular Ring Based Linear-Circular and Linear-Cross Reflective Type Polarizer for THz Regime | IEEE Conference Publication | IEEE Xplore

A Simple Wideband Dual-Slotted Circular Ring Based Linear-Circular and Linear-Cross Reflective Type Polarizer for THz Regime


Abstract:

The design of a wideband reflecting type linear-circular and linear-linear polarization converter in the THz frequency regime is described in depth in this work. The refl...Show More

Abstract:

The design of a wideband reflecting type linear-circular and linear-linear polarization converter in the THz frequency regime is described in depth in this work. The reflective polarizer unitcell seen here is made of a simple circular ring with two orthogonal cuts printed on top of a \text{Si} 0_{2} substrate which is terminated with the ground. Post simulation results show a linearly polarized ((x/y) incident wave converted to its cross (y/x) component in two frequency bands (7.19-11.12 THz and 15.28-15.78 THz) after reflection. The reflected wave would also be circularly polarized in the frequency bands (5.77-6.38 THz and 12.40-14.01 THz). The proposed structure has a unitcell periodicity of 0.1846 \lambda_{\mathrm{L}} and an effective thickness of 0.0685 \lambda_{\mathrm{L}}, where \lambda_{\mathrm{L}} is the lowest broadband frequency. For linear to cross conversion, the proposed design has a stable reaction up to 45°, and for linear to circular conversion, it has a stable response up to 30°. Authors are convinced that the proposed geometry has several advantages like simple, compact, and angular stable. It is used in real-time applications like polarization beam-splitters and time-domain spectroscopy, where these conversions are the primary concern.
Date of Conference: 18-19 November 2021
Date Added to IEEE Xplore: 19 January 2022
ISBN Information:
Conference Location: Kollam, India

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