Polarization filtering in the visible wavelength range using surface plasmon resonance and a sunflower-type photonic quasi-crystal fiber

Abstract

A novel polarization filter based on a sunflower-type photonic quasi-crystal fiber (PQF) is proposed in this paper. We also discuss different methods to tune the filter wavelength. The proposed filter can efficiently produce polarized light with visible wavelengths by using the resonance between the second-order surface plasmon polariton mode and the core mode of the PQF. The filtered wavelength can be tuned between 0.55 µm and 0.68 µm by adjusting the thickness of the gold film. When the thickness of the gold film is 25.3 nm, the resonance loss in the y-polarized direction reaches 11707 dB m−1 for a wavelength of 0.6326 µm, and the full width at half maximum is only 5 nm. Due to the flexible design and absence of both polarization coupling and polarization dispersion, this polarization filter can be used in devices that require narrow-band filtering.

Plasmonic Refractive Index Sensors Based on One- and Two-Dimensional Gold Grating on a Gold Film

“…The electric field enhancement [6][7][8] and strong absorption [9,10] caused by the local surface plasmons are widely used in surface-enhanced Raman scattering [11][12][13] and enhanced absorption [14,15]. In addition, the unique optical properties of surface plasmons have a wide range of applications in photocatalysis [16][17][18][19][20], absorber [21][22][23][24], photolithography [25][26][27][28], filter [29,30], optical data storage [31,32], and other fields [33][34][35][36]. At present, one of the most important researches focusing on surface plasmons is refractive index sensing [37][38][39][40][41][42].…”

Bend-resistant multiring fiber with large mode area and single-mode operation

“…Photonic crystal fibers (PCFs) have a flexible structure and large mode field area 16 – 22 Introduction of air holes can increase the refractive index difference between core and cladding to reduce bending loss. Leakage channels can help to modulate mode leakage performance to attenuate the high order modes (HOMs).…”

Orbital angular momentum-excited surface plasmon resonance for liquid refractive index sensing by photonic crystal fiber with high sensitivity and wide detection range

“…These air holes can be arranged periodically or randomly in the cladding region in the solid or hollow core. Compared with traditional optical fibers, the size and arrangement of the air holes in the PCF can be flexibly changed to adjust the guide mode in the core 17 . By plating a metal film on the surface of the air holes or optical cladding and modifying the size and position of the air holes, effective coupling between the guide mode and SPP mode can be achieved to excite SPR.…”