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Photonics 2018, 5(4), 40; https://doi.org/10.3390/photonics5040040

A Highly Sensitive, Polarization Maintaining Photonic Crystal Fiber Sensor Operating in the THz Regime

Department of Electrical and Computer Engineering, Boise State University, Boise, ID 83725, USA
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Received: 21 September 2018 / Revised: 17 October 2018 / Accepted: 23 October 2018 / Published: 25 October 2018
(This article belongs to the Special Issue Terahertz Photonics)
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Abstract

In this paper, a high sensitivity, polarization preserving photonic crystal fiber (PCF), based on circular air holes for sensing in the terahertz (THz) band, is presented. The finite element method, a practical and precise computational technique for describing the interactions between light and matter, is used to compute the modal properties of the designed fiber. For the designed PCF, comprising of circular air holes in both the cladding and in the porous core, a relative sensitivity of 73.5% and a high birefringence of 0.013 are achieved at 1.6 THz. The all circular air-hole structure, owing to its simplicity and compatibility with the current fiber draw technique for PCF fabrication, can be realized practically. It is anticipated that the designed fiber can be employed in applications such as detection of biological samples and toxic chemicals, imaging, and spectroscopy. View Full-Text
Keywords: far infrared or THz; relative sensitivity; modal birefringence; fiber sensor; photonic crystal fiber far infrared or THz; relative sensitivity; modal birefringence; fiber sensor; photonic crystal fiber
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Rana, S.; Kandadai, N.; Subbaraman, H. A Highly Sensitive, Polarization Maintaining Photonic Crystal Fiber Sensor Operating in the THz Regime. Photonics 2018, 5, 40.

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