Photonic crystal fiber (PCF) is also known as microstructure lattice in which silica is a background material [
1,
2]. First PCF was expanded from the fiber drawing tower in Knight et al. [
3] and it has been concerned to the field of optical communication. Tunable dispersion, high nonlinearity, flexible design and high birefringence are matchless characteristics compared to the conventional optical fiber. It has been broadly used in many fields such as chemistry, medicine and biology for its convenient characteristics [
4]. When light is propagates in a PCF through metal layer, the free electrons in the metal will take up the power of the light. The light signal in silica core couples with surface plasmon polaritons (SPPs). When their phases are same, surface plasmon resonance (SPR) happens [
5]. The amalgamation of PCF and plasmonics is a promising research field in the area of light science. Remarkably, the polarization filter has been a major element of communication system. PCF filters are applied widely in sensing applications as a polarizer and fiber tools [
6–
11]. In 1993, Jorgenson and Yee [
12] invented a PCF which encouraged SPP modes. Nagasaki et al. [
13] accomplished a large polarization extinction ratio (ER) by proposing a polarization filter by carefully filling metal wires in the cladding region of PCF. Zi et al. [
14] proposed a PCF polarization filter in which communication wavelengths was 1310 and 1550 nm by applying two gold coated air holes [
15]. Zhang et al. have initially revealed that selective metal coating in the PCF is practicable [
16]. Zhang et al. expressed an optical fiber which takes up polarizer by choosing coating metal on the surface of air hole [
17]. Li and Zhao have established the operating wavelengths of optical polarizer and can be modulated by adjusting the air hole size [
18]. So geometrical parameters of the PCF have been carefully optimized to create the loss of one polarization mode which is much larger than another polarized mode [
19]. In this paper, we got maximum loss in
x-polarization is 692.25 dB/cm and minimum loss in
y-polarization is 1.13 dB/cm at the resonance position 1.42 µm.