Refractive index sensor based on silica microfiber doped with Ag microparticles

Abstract We proposed a composite microfiber using silica capillary and Ag microparticles, and demonstrated its optical sensing characteristics by changing the refractive index of surrounding environment using different concentrations of NaCl solution. Either the diameter or doping density of Ag microparticles contributes to the sensitivity change. The experimental results reveal that the diameter uniformity and distribution of Ag microparticles exerted impact on the sensing performance. The highest sensitivity of −7246 dB/RIU has been experimentally demonstrated in this work. The selectivity of this composite microfiber sensor will be explored by decorating its surface with some enzyme or other sensitive materials.

[1]  Vinod K. Singh,et al.  Fabrication and characterization of cascaded tapered Mach-Zehnder interferometer for refractive index sensing , 2016 .

[2]  Yong Zhao,et al.  Fiber optic SPR sensor for liquid concentration measurement , 2014 .

[3]  Yong Zhao,et al.  Flexible NWs sensors in polymer, metal oxide and semiconductor materials for chemical and biological detection , 2015 .

[4]  W. Urbańczyk,et al.  Effect of constructional parameters on the performance of a surface plasmon resonance sensor based on a multimode polymer optical fiber. , 2014, Applied optics.

[5]  Ming Ding,et al.  A Review of Microfiber and Nanofiber Based Optical Sensors , 2013 .

[6]  Fabrication and characterization of high order filter based on resonance in hybrid multi-knots microfiber structure , 2016 .

[7]  Yundong Zhang,et al.  The optical response of the silver nano-sphere with two spindle-shaped cavities in a sub-wavelength quartz fiber , 2013 .

[8]  David J. Singh,et al.  Light scattering and surface plasmons on small spherical particles , 2014, 1407.2345.

[9]  Yan-qing Lu,et al.  Optical electrical current sensor utilizing a graphene-microfiber-integrated coil resonator , 2015 .

[10]  A. A. Jasim,et al.  Highly responsive NaCl detector based on inline microfiber Mach–Zehnder interferometer , 2016 .

[11]  Harith Ahmad,et al.  Evanescent field interaction of tapered fiber with graphene oxide in generation of wide-bandwidth mode-locked pulses , 2017 .

[12]  C. Liao,et al.  Microfiber in-line Mach-Zehnder interferometer for strain sensing. , 2013, Optics letters.

[13]  Patrice Mégret,et al.  Fiber Bragg Grating Sensors toward Structural Health Monitoring in Composite Materials: Challenges and Solutions , 2014, Sensors.

[14]  Limin Tong,et al.  Microfiber Optical Sensors: A Review , 2014, Sensors.

[15]  N. Chen,et al.  Tapered optical fiber sensor based on localized surface plasmon resonance. , 2012, Optics express.

[16]  Jing Li,et al.  Magnetic field and temperature sensor based on a no-core fiber combined with a fiber Bragg grating , 2015 .

[17]  Meng Wang,et al.  Plasmon Singularities from Metal Nanoparticles in Active Media: Influence of Particle Shape on the Gain Threshold , 2012, Plasmonics.

[18]  Yong-xing Jin,et al.  Magneto-optical fiber sensor based on bandgap effect of photonic crystal fiber infiltrated with magnetic fluid , 2012 .

[19]  Plasmon resonance of silver micro-sphere in fiber taper. , 2013, Optics express.