Photonic crystal fiber with anomalous dispersion behavior and high birefringence

Author(s):  
Pranaw Kumar ◽  
Priyanka Das
Sensors ◽  
2021 ◽  
Vol 21 (5) ◽  
pp. 1799
Author(s):  
Tianyu Yang ◽  
Liang Zhang ◽  
Yunjie Shi ◽  
Shidi Liu ◽  
Yuming Dong

A photonic crystal fiber (PCF) with high relative sensitivity was designed and investigated for the detection of chemical analytes in the terahertz (THz) regime. To ease the complexity, an extremely simple cladding employing four struts is adopted, which forms a rectangular shaped core area for filling with analytes. Results of enormous simulations indicate that a minimum 87.8% relative chemical sensitivity with low confinement and effective material absorption losses can be obtained for any kind of analyte, e.g., HCN (1.26), water (1.33), ethanol (1.35), KCN (1.41), or cocaine (1.50), whose refractive index falls in the range of 1.2 to 1.5. Besides, the PCF can also achieve high birefringence (∼0.01), low and flat dispersion, a large effective modal area, and a large numerical aperture within the investigated frequency range from 0.5 to 1.5 THz. We believe that the proposed PCF can be applied to chemical sensing of liquid and THz systems requiring wide-band polarization-maintaining transmission and low attenuation.


2006 ◽  
Author(s):  
Przemyslaw Szarniak ◽  
Matteo Foroni ◽  
Ryszard Buczynski ◽  
Dariusz Pysz ◽  
Piotr Wasylczyk ◽  
...  

Photonics ◽  
2018 ◽  
Vol 5 (4) ◽  
pp. 40 ◽  
Author(s):  
Sohel Rana ◽  
Nirmala Kandadai ◽  
Harish Subbaraman

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.


2014 ◽  
Vol 43 (9) ◽  
pp. 906003
Author(s):  
姜凌红 JIANG Ling-hong ◽  
郑义 ZHENG Yi ◽  
郑凯 ZHENG Kai ◽  
彭继迎 PENG Ji-ying

2016 ◽  
Vol 45 (s1) ◽  
pp. 120001
Author(s):  
武丽敏 Wu Limin ◽  
宋 朋 Song Peng ◽  
王 静 Wang Jing ◽  
张海鹍 Zhang Haikun ◽  
周 城 Zhou Cheng ◽  
...  

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