Microchannel-based plasmonic refractive index sensor for low refractive index detection

Haque, Emranul; Hossain, Md. Anwar; Namihira, Y.; Ahmed, Feroz

doi:10.1364/ao.58.001547

Cited by 88 publications

(29 citation statements)

References 24 publications

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“…By polishing process, part of the fiber plus the large thin wall capillary from the second ring will be polished and the remaining part of the capillary produces the microchannel. Chemical deposition method [18], [19], [21] is then applied to coat the silver and TiO 2 on the polished side of the fiber.…”

Section: Numerical Design and Modelingmentioning

confidence: 99%

“…As a result, a peak is observed at the point of intersection. The propagation loss or confinement loss has been calculated by the following equation [5], [21].…”

Section: Numerical Design and Modelingmentioning

confidence: 99%

“…Nowadays there are abundance applications arising where low RI needs to be identified, such as aerogel [15], halogenated ether [16], sevoflurane, pharmaceutical drugs, and so on. Considering this fact some PCF-SPR sensors have been come up in the contemporary time which is apt to sense lower RI of analyte less than 1.30 [16]- [21]. The highest WS of the mentioned sensors are 13500, 6000,11055, 20000,13000 and 51000 nm/RIU, respectively.…”

Section: Introductionmentioning

confidence: 99%

“…The highest WS of the mentioned sensors are 13500, 6000,11055, 20000,13000 and 51000 nm/RIU, respectively. However, AS has been calculated only in [19], [21] which are about 1054 and 1872 RIU −1 , respectively.This indicates enough scope for PCF-SPR sensor able to detect lower refractive index with enhanced sensitivity in both interrogation methods.…”

Section: Introductionmentioning

confidence: 99%

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Highly Sensitive Dual-Core PCF Based Plasmonic Refractive Index Sensor for Low Refractive Index Detection

et al. 2019

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A highly sensitive surface plasmon resonance (SPR) sensor on a dual-core photonic crystal fiber (PCF) for low refractive index (RI) detection is presented in this paper. Plasmonic material silver (Ag) is deposited outside of the fiber structure to detect changes of the surrounding medium's refractive index. To prevent oxidation a thin layer of titanium dioxide (TiO 2) is employed on top of the silver. The sensor shows maximum wavelength sensitivity and amplitude sensitivity of 116,000 nm/RIU and 2452 RIU −1 with corresponding resolutions (R) of 8.62 × 10 −7 and 5.55 × 10 −6 RIU, respectively. A thorough study of the relevant literature yielded that these attained sensitivities in both interrogation methods are the highest among reported PCF-SPR sensors to date. In addition, the sensor possesses a very high figure of merit of 2320 in the sensing range of 1.29 to 1.39. Therefore, it would be a suitable candidate for pharmaceutical inspection, organic chemical sensing, and biosensing and other analytes detection.

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Section: Numerical Design and Modelingmentioning

confidence: 99%

“…As a result, a peak is observed at the point of intersection. The propagation loss or confinement loss has been calculated by the following equation [5], [21].…”

Section: Numerical Design and Modelingmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Highly Sensitive Dual-Core PCF Based Plasmonic Refractive Index Sensor for Low Refractive Index Detection

et al. 2019

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“…Sensing performance has been improved significantly by applying a Titanium dioxide (TiO 2 ) layer coated in between the gold film and silica glass of microchannel. In this PCF-SPR sensor, the maximum wavelength sensitivity (WS) of 51,000 nm/RIU was obtained [ 16 ]. The effects of plasmonic materials and layers on the PCF-SPR sensor were previously numerically investigated and analyzed for graphene on Ag and very few Gold layers on Ag [ 11 ].…”

Section: Introductionmentioning

confidence: 99%

Sensitivity Enhancement of Modified D-Shaped Microchannel PCF-Based Surface Plasmon Resonance Sensor

Noman

Haque

Hossain

et al. 2020

Sensors

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In this work, a highly sensitive dual-core configured microchannel-based plasmonic refractive index (RI) sensor was investigated, which can be used for low RI detection. Both the sensing layer and the plasmonic material layer were built outside of the fiber design to detect the surrounding medium’s RI changes. Additionally, the effects of different plasmonic materials gold (Au), silver (Ag), and copper (Cu) toward sensitivity were investigated for the same structure. An adhesive agent was used in this work, titanium dioxide (TiO2), and was coated on top of the plasmonic material to prevent the oxidation of Ag and Cu. The coupling strength between the fundamental mode and the surface plasmon polariton (SPP) mode was observed to be very strong due to the TiO2 adhesive agent. With a resolution of 7.41 × 10−7 RIU, maximum wavelength sensitivity (WS) of 135,000 nm/RIU and amplitude sensitivity (AS) of 3239 RIU−1 were achieved using the proposed sensor while using Au as a plasmonic material for an analyte RI range of 1.29–1.39. A detailed study of relevant literature revealed that the achieved wavelength sensitivity for plasmonic material gold (Au) is the highest among reported photonic crystal fiber (PCF)-surface plasmon resonance (SPR) sensors to date.

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Terahertz refractive index sensor with high sensitivity based on two‐core photonic crystal fiber

Mishra¹,

Kumar²,

Chaudhary³

et al. 2020

Micro & Optical Tech Letters

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This article contributes a highly sensitive novel refractive index (RI) sensor based on two-core photonic crystal fiber (PCF) is proposed in the terahertz (THz) frequency regime. The sensing performance of the proposed RI sensor is based on the mode-coupling theory. Two vertical cores of the PCF divided by the central air hole, act as two separate waveguides. The analyte whose refractive index being sensed is filled in the central air hole of the PCF. A full-vector finite element method (FEM) approach is used to investigate the sensor. Numerical data reveal that the sensitivities of the proposed PCF are 672 600, 940480, 1035300, 1332200, and 1 827 300 nm/RIU for the RI sensing range of analyte from 1.30 to 1.33, 1.34 to 1.37, 1.38 to 1.40, 1.41 to 1.43, and 1.44 to 1.46, respectively. This indicates that the proposed RI sensor is highly sensitive to the refractive index of the analyte.

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Microchannel-based plasmonic refractive index sensor for low refractive index detection

Cited by 88 publications

References 24 publications

Highly Sensitive Dual-Core PCF Based Plasmonic Refractive Index Sensor for Low Refractive Index Detection

Highly Sensitive Dual-Core PCF Based Plasmonic Refractive Index Sensor for Low Refractive Index Detection

Sensitivity Enhancement of Modified D-Shaped Microchannel PCF-Based Surface Plasmon Resonance Sensor

Terahertz refractive index sensor with high sensitivity based on two‐core photonic crystal fiber

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