Title :
Two Kinds of Polarization Filter Based on Photonic Crystal Fiber With Nanoscale Gold Film
Author :
Qiang Liu ; Shuguang Li ; Hailiang Chen
Author_Institution :
Key Lab. of Metastable Mater. Sci. & Technol., Yanshan Univ., Qinhuangdao, China
Abstract :
The polarization characteristics of photonic crystal fibers (PCFs) with nanoscale gold film are evaluated by using a finite element method. The coupling theory between core mode and SPP mode is introduced. Their application to fiber filter is investigated. The PCF filters for the ranges of 1.31, 1.48, and 1.55 μm and a wide wavelength range are designed. We demonstrate that the resonance wavelengths are modulated by adjusting the diameter of the air hole with gold film, and the resonance wavelengths of x-polarized and y-polarized mode are divided by high birefringence of core. By our structure, the loss of y-polarized mode is larger than the loss of x-polarized mode at the resonance wavelength. When the diameter of the air hole with gold film is big enough, the loss of y-polarized mode is further larger than the loss of x-polarized mode at the wavelength range of 1.25-2.0 μm.
Keywords :
finite element analysis; gold; holey fibres; metallic thin films; nanophotonics; optical fibre filters; optical films; photonic crystals; Au; PCF; SPP mode; air hole; core mode; coupling theory; finite element method; nanoscale gold film; photonic crystal fiber; polarization filter; resonance wavelengths; wavelength 1.25 mum to 1.55 mum; x-polarized mode; y-polarized mode; Couplings; Gold; Information filtering; Nanoscale devices; Optical losses; Refractive index; Photonic crystal fiber; Polarization filter; polarization filter;
Journal_Title :
Photonics Journal, IEEE
DOI :
10.1109/JPHOT.2014.2387262
