title: Polarization filter characters of the gold-coated and the liquid filled photonic crystal fiber based on surface plasmon resonance.
abstract: The polarization filter characters of a gold-coated and liquid-filled photonic crystal fiber are studied using the finite element method. Results show that the resonance strength and wavelengths are different in two polarized directions. Filling liquid of refractive index n=1.33 (purified water) in holes in longitudinal direction can increase the loss of core mode polarized in the y-direction around the resonance peak. The resonance strength is much stronger in y-polarized direction than in x-polarized direction. The resonance strength can achieve 508dB/cm in y-polarized direction at the communication wavelength of 1311nm in one of our structures. Moreover, the full width half maximum is only 20nm. Such a small number makes such photonic crystal fibers promising candidate to filter devices. A liquid filled PCF of the small hole in the fiber core is designed and we find that filling liquid increases the resonance strength peak by thirty eight percent for the y-polarized resonance point.
authors.affiliation: Key Laboratory of Metastable Materials Science and Technology, College of Science, Yanshan University, Qinhuangdao 066004, China.
authors.forename: Jianrong
authors.initials: J
authors.lastname: Xue
authors.forename: Shuguang
authors.initials: S
authors.lastname: Li
authors.forename: Yuzhe
authors.initials: Y
authors.lastname: Xiao
authors.forename: Wei
authors.initials: W
authors.lastname: Qin
authors.forename: Xujun
authors.initials: X
authors.lastname: Xin
authors.forename: Xingping
authors.initials: X
authors.lastname: Zhu