Side-Polished D-Type Fiber SPR Sensor for RI Sensing With Temperature Compensation

Liu, Lu; Liu, Zhihai; Zhang, Yu; Liu, Shutian

doi:10.1109/jsen.2021.3080290

Cited by 63 publications

(18 citation statements)

References 34 publications

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“…This may because the penetration depth of the evanescent wave would increase along with the external refractive index, thus more evanescent waves can break through the cladding and propagate forward along the surface of the cladding in the external medium environment. Therefore, when the external environment changes, variations in the evanescent wave would occur correspondingly, so as to realize the detection of external parameters with enhanced sensitivity, which has been previously reported then proved [ 49 , 50 ].…”

Section: Resultsmentioning

confidence: 99%

A Taper-in-Taper Structured Interferometric Optical Fiber Sensor for Cu2+ ion Detection

Gong

Lei

Wang

et al. 2022

Sensors

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Copper ion is closely associated with the ecosystem and human health, and even a little excessive dose in drinking water may result in a range of health problems. However, it remains challenging to produce a highly sensitive, reliable, cost-effective and electromagnetic-interference interference-immune device to detect Cu2+ ion in drinking water. In this paper, a taper-in-taper fiber sensor was fabricated with high sensitivity by mode-mode interference and deposited polyelectrolyte layers for Cu2+ detection. We propose a new structure which forms a secondary taper in the middle of the single-mode fiber through two-arc discharge. Experimental results show that the newly developed fiber sensor possesses a sensitivity of 2741 nm/RIU in refractive index (RI), exhibits 3.7 times sensitivity enhancement when compared with traditional tapered fiber sensors. To apply this sensor in copper ions detection, the results present that when the concentration of Cu2+ is 0–0.1 mM, the sensitivity could reach 78.03 nm/mM. The taper-in-taper fiber sensor exhibits high sensitivity with good stability and mechanical strength which has great potential to be applied in the detection of low Cu2+ ions in some specific environments such as drinking water.

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Section: Resultsmentioning

confidence: 99%

A Taper-in-Taper Structured Interferometric Optical Fiber Sensor for Cu2+ ion Detection

Gong

Lei

Wang

et al. 2022

Sensors

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show abstract

“…During the past five years, the above-mentioned new structure has been widely used in actual detection, involving different biomolecules [ 12 ], chemicals [ 13 ], and temperature [ 14 ]. This detection function can be used in a wide range of applications such as the water environment pH value and RI [ 15 ], various gases [ 16 ], and humidity [ 17 ]. In this section, the application of the plasma sensor based on the special optical fiber structure is introduced for biomolecular detection, chemical quantities detection, and physical quantities detection.…”

Section: Special Optical Fiber Structure-based Biosensing Applicationsmentioning

confidence: 99%

“…For this, the perception of external subtle changes is then realized through data demodulation and processing. According to these steps, it can be applied to detect different biomolecules [ 12 ], chemicals [ 13 ], and temperature [ 14 ], and also a wide range of other applications such as the water environment pH value and RI [ 15 ], various gases [ 16 ], humidity [ 17 ] etc. However, with the increasing demand for the application of sensor technology, especially in life science, clinical diagnosis, medicine, and food safety, the sensitivity and specificity of plasma sensors for low-dose analyte detection are required to be higher [ 18 ].…”

Section: Introductionmentioning

confidence: 99%

Novel Optical Fiber-Based Structures for Plasmonics Sensors

et al. 2022

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Optical fiber sensors based on surface plasma technology have many unique advantages in specific applications such as extreme environmental monitoring, physical parameter determination, and biomedical indicators testing. In recent decades, various kinds of fiber probes with special structures were developed according to special processing such as tapering, splicing, etching, fiber balls, grating etc. In this paper, the fabrication technology, characteristics, development status and application scenarios of different special optical fiber structures are briefly reviewed, including common processing equipment. Furthermore, many special novel optical fiber structures reported in recent years are summarized, which have been used in various kinds of plasmonic sensing work. Then, the fiber-plasmonic sensors for practical applications are also introduced and examined in detail. The main aim of this review is to provide guidance and inspiration for researchers to design and fabricate special optical fiber structures, thus facilitating their further research.

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“…One contemporary, critical challenge is finding novel materials that are both stable and capable of good performance in harsh environments as surface plasmon resonance (SPR) measurements and their precision are highly affected by temperature perturbation, producing large errors due to the strong influence of temperature in SPR. The typical mitigation of this issue involves an additional sensing region for the simultaneous measurement of the RI and temperature. − …”

Section: Introductionmentioning

confidence: 99%

Al–Au Thin Films for Thermally Stable and Highly Sensitive Plasmonic Sensors

et al. 2022

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Plasmonic sensors provide label-free detection of bio and chemical targets with ultrahigh sensitivity and accuracy. However, they usually lack the ability to operate at high temperatures, producing large measurement errors due to perturbations. Here, we report a surface plasmon resonance sensor based on Al–Au thin films, which outperforms its conventional Au counterpart by providing a temperature-stable response. We fabricate six metallic samples via the co-sputtering depositing method, obtaining four bimetallic thin films and two pure metals. Through spectroscopic ellipsometry, transmission measurements, and scanning electron microscopy images, we obtain their dielectric function and film morphology from room temperature to 200 °C, showing that the films containing Al do not undergo significant changes with increasing temperature. We experimentally and theoretically establish the dispersion relation of Al–Au alloys by varying the film chemical composition. Using the transfer matrix method, we evaluate the performance of the sensors by studying their response in the refractive index measurement of air, water, and a biological environment. We show that all alloys outperform their pure counterparts, achieving maximum theoretical sensitivities of 42411 nm/RIU and 162.7 °/RIU for a Au0.62Al0.38-based wavelength-dependent sensor and a Au0.85Al0.15-based angular-dependent sensor, respectively. We find that Au0.85Al0.15 is a particularly promising candidate for both wavelength- and angular-dependent sensors due to its high sensitivity (18967 nm/RIU and 162.7 °/RIU) and good peak definition. Furthermore, using partial density-of-state calculations assisted by machine learning, we obtain the dielectric function of the films, showing an excellent agreement with our experimental results. The alloying approach assisted by computational prediction of the samples’ physical properties has the potential to accelerate the discovery of novel materials for plasmonic sensors with high sensitivity and excellent functioning capabilities at elevated temperatures.

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Side-Polished D-Type Fiber SPR Sensor for RI Sensing With Temperature Compensation

Cited by 63 publications

References 34 publications

A Taper-in-Taper Structured Interferometric Optical Fiber Sensor for Cu2+ ion Detection

A Taper-in-Taper Structured Interferometric Optical Fiber Sensor for Cu2+ ion Detection

Novel Optical Fiber-Based Structures for Plasmonics Sensors

Al–Au Thin Films for Thermally Stable and Highly Sensitive Plasmonic Sensors

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