A terahertz single-polarization single-mode photonic crystal fiber with a rectangular array of micro-holes in the core region

2012 ◽  
Vol 285 (18) ◽  
pp. 3726-3729 ◽  
Author(s):  
Haibin Chen ◽  
Hui Wang ◽  
Honglu Hou ◽  
Daru Chen
Keyword(s):  
Photonic Crystal ◽  
Photonic Crystal Fiber ◽  
Single Mode ◽  
Core Region ◽  
Rectangular Array ◽  
Crystal Fiber ◽  
The Core ◽  
Micro Holes ◽  
Single Polarization

scholarly journals A Controllable Plasmonic Resonance in a SiC-Loaded Single-Polarization Single-Mode Photonic Crystal Fiber Enables Its Application as a Compact LWIR Environmental Sensor

Materials ◽  
2020 ◽  
Vol 13 (18) ◽  
pp. 3915
Author(s):  
Tianyu Yang ◽  
Can Ding ◽  
Richard W. Ziolkowski ◽  
Y. Jay Guo
Keyword(s):  
Photonic Crystal ◽  
Photonic Crystal Fiber ◽  
Single Mode ◽  
Resonance Wavelength ◽  
Resonant Absorption ◽  
Plasmonic Resonance ◽  
Crystal Fiber ◽  
The Core ◽  
Environmental Sensor ◽  
Single Polarization

Near-perfect resonant absorption is attained in a single-polarization single-mode photonic crystal fiber (SPSM PCF) within the long-wave infrared (LWIR) range from 10 to 11 μm. The basic PCF design is a triangular lattice-based cladding of circular air holes and a core region augmented with rectangular slots. A particular set of air holes surrounding the core is partially filled with SiC, which exhibits epsilon near-zero (ENZ) and epsilon negative (ENG) properties within the wavelength range of interest. By tuning the configuration to have the fields of the unwanted fundamental and all higher order modes significantly overlap with the very lossy ENG rings, while the wanted fundamental propagating mode is concentrated in the core, the SPSM outcome is realized. Moreover, a strong plasmonic resonance is attained by adjusting the radii of the resulting cylindrical core-shell structures. The cause of the resonance is carefully investigated and confirmed. The resonance wavelength is shown to finely shift, depending on the relative permittivity of any material introduced into the PCF’s air holes, e.g., by flowing a liquid or gas in them. The potential of this plasmonic-based PCF structure as a very sensitive, short length LWIR spectrometer is demonstrated with an environmental monitoring application.

A photonic crystal fiber for single-polarization single-mode operation

2011 ◽  
Author(s):  
Hongjun Zheng ◽  
Chongqing Wu ◽  
Zhi Wang ◽  
Shanliang Liu ◽  
Huishan Yu ◽  
...  
Keyword(s):  
Photonic Crystal ◽  
Photonic Crystal Fiber ◽  
Single Mode ◽  
Single Mode Operation ◽  
Crystal Fiber ◽  
Mode Operation ◽  
Single Polarization

Design of single mode single polarization large mode area photonic crystal fiber

2015 ◽  
Author(s):  
Kishor D. Naik ◽  
Than Singh Saini ◽  
Ajeet Kumar ◽  
Ravindra K. Sinha
Keyword(s):  
Photonic Crystal ◽  
Photonic Crystal Fiber ◽  
Single Mode ◽  
Large Mode Area ◽  
Crystal Fiber ◽  
Single Polarization ◽  
Mode Area

scholarly journals A Terahertz (THz) Single-Polarization-Single-Mode (SPSM) Photonic Crystal Fiber (PCF)

Materials ◽  
2019 ◽  
Vol 12 (15) ◽  
pp. 2442 ◽  
Author(s):  
Tianyu Yang ◽  
Can Ding ◽  
Richard W. Ziolkowski ◽  
Y. Jay Guo
Keyword(s):  
Photonic Crystal ◽  
Photonic Crystal Fiber ◽  
Single Mode ◽  
Propagation Distance ◽  
Wide Frequency Range ◽  
Crystal Fiber ◽  
Novel Approach ◽  
Gain Material ◽  
Single Polarization ◽  
Different Diameters

This paper presents a novel approach to attain a single-polarization-single-mode (SPSM) photonic crystal fiber (PCF) in the terahertz (THz) regime. An initial circular hole PCF design is modified by introducing asymmetry in the first ring of six air holes in the cladding, i.e., epsilon-near-zero (ENZ) material is introduced into only four of those air holes and the other two remain air-filled but have different diameters. The resulting fundamental X-polarized (XP) and Y-polarized (YP) modes have distinctly different electric field distributions. The asymmetry is arranged so that the YP mode has a much larger amount of the field distributed in the ENZ material than the XP mode. Since the ENZ material is very lossy, the YP mode suffers a much higher loss than the XP mode. Consequently, after a short propagation distance, the loss difference (LD) between the XP and YP modes will be large enough that only the XP mode still realistically exists in the PCF. To further enhance the outcome, gain material is introduced into the core area to increase the LDs between the wanted XP mode and any unwanted higher order (HO) modes, as well as to compensate for the XP mode loss without affecting the LD between the XP and YP modes. The optimized PCF exhibits LDs between the desired XP mode and all other modes greater than 8.0 dB/cm across a wide frequency range of 0.312 THz. Consequently, the reported PCF only needs a length of 2.5 cm to attain an SPSM result, with the unwanted modes being more than 20 dB smaller than the wanted mode over the entire operational band.

A novel single-polarization single-mode photonic crystal fiber

2006 ◽  
Author(s):  
Fangdi Zhang ◽  
Xiaoyi Liu ◽  
Zhiguo Zhang ◽  
Min Zhang ◽  
Peida Ye
Keyword(s):  
Photonic Crystal ◽  
Photonic Crystal Fiber ◽  
Single Mode ◽  
Crystal Fiber ◽  
Single Polarization
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