Strong power absorption in a new microstructured holey fiber-based plasmonic sensor

Simulation of the Sensing Performance of a Plasmonic Biosensor Based on Birefringent Solid-Core Microstructured Optical Fiber

“…Microstructured optical fiber-based plasmonic devices have attracted a large interest [1][2][3][4][5][6][7][8] for their application in chemical and biochemical sensing because of their large sensitivity combined with the possibility to easily tailor their properties by varying the geometry of the photonic crystal fiber. For instance, by changing the hole number and position the phase matching [1] or the loss matching [2][3] conditions between the fundamental HE 11 core mode and a plasmon mode can be achieved.…”

“…In search of new approaches to enhance the sensitivity, recently, quite a number of papers have proposed new photonic crystal structures that exploit asymmetries to induce birefringence. An example is in [4], which uses a two ring hexagonal lattice photonic crystal fiber arrangement and the gold layer and the analyte are not placed inside the air-holes but outside the fiber structure, allowing a simplification in the fabrication process [2][3]. The obtained spectral sensitivity λ S is 4000 nm/RIU (RIU stands for Refractive Index Units) when the refractive index of the analyte n a is varied from 1.33 to 1.34 and 2000 nm/RIU when n a is varied from 1.36 to 1.37; the amplitude sensitivity S A is 320 RIU -1 for n a = 1.36.…”

Photonic crystal fiber based plasmonic sensors

“…The influence of airhole sizes in the 1 st ring of the microstructured fiber on the plasmonic phenomena has also been investigated. The maximum amplitude sensitivity and the sensor resolution were found to be 3941.5 RIU -1 and 1×10 -5 RIU, respectively [135]. A simple configuration for PCF SPR biosensors have been reported, where the air holes in the vicinity of central hole were sealed and in the same row, air holes were scaled down to create a gap for the penetration of evanescent fields to excite the surface plasmons ( Figure 6a) [49].…”

“…The PCF SPR sensors are improved by placing a metal layer and sensing medium outside the fiber structure [33,40,41,48,[131][132][133][134][135]. Hassani el al.…”

Combined optical water quality monitoring and sanitization system

“…Surface Plasmon Resonance (SPR) is well-known to be one of the elective optical phenomena that can be exploited to build high sensitivity devices for the detection of chemicals, which are used not only at the research level, but also in commercial lab instruments. [4][5][6] The challenge is to transfer this approach into a low-cost, affordable, and sensitive enough device to enable its wide deployment.…”