Research on the performance of a novel SPR sensor based on graded index multimode fiber

Purpose This paper aims to propose and demonstrate a novel surface plasmon resonance (SPR)-sensing approach by using the fundamental mode beam based on a graded index multimode fiber (GIF). The proposed SPR sensor has high sensitivity and controllable working dynamic range, which expects to solve the two bottlenecks of fiber SPR sensor, including low sensitivity and the difficulty in multichannel detection. Design/methodology/approach The low-order mode of the GIF to SPR sense, which keeps the sensitivity advantage of the single-mode fiber SPR sensor, is used. By using this new SPR sensor, the effect of light incident angle and gold film thickness on working dynamic range was studied. According to the study results, the smaller is the incident angle, the larger is the SPR working dynamic range and the longer is the resonance wavelength with a fixed gold film thickness; the larger is the gold film thickness, the longer is the resonance wavelength with a fixed grinding angle. After the parameter optimization, the sensitivity of these two parameter-adjusting methods reach 4,442 and 3031 nm/RIU. Originality/value When the grinding angle of the GIF increases, the dynamic range of the resonance wavelength increases and has a redshift, sensitivity increases, and the resonance valley becomes more unobvious with a fixed gold film thickness. Similarly, when gold film thickness increases, the dynamic range of the resonance wavelength increases and has a redshift, sensitivity increases, and the resonance valley becomes more unobvious with a fixed grinding angle. These adjusting performance aforementioned lay the foundation for solving of the fiber-based SPR multichannel detection and increasing of the fiber-based SPR sensor sensitivity, which has a good application value.

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Fabrication of multi-mode tip fiber sensor based on surface plasmon resonance (SPR)

Sustainable Engineering and Innovation, ISSN 2712-0562 ◽

10.37868/sei.v2i1.27 ◽

2020 ◽

Vol 2 (1) ◽

pp. 10-17

Author(s):

Nidaa AL-Janaby ◽

Anwaar AL-Dergazly

Keyword(s):

Surface Plasmon Resonance ◽

Surface Plasmon ◽

Plasmon Resonance ◽

Gold Film ◽

Resonance Wavelength ◽

Fiber Optic Sensor ◽

Spr Sensor ◽

Optic Sensor ◽

Reflected Light ◽

Multi Mode

During this work, fiber optic sensor based on surface Plasmon resonance (SPR) was prepared. The sensor of SPR was configured by coating a thin layer of gold film on the end of a cleaved optical fiber by a sputtering technique. The source of white light was utilized to produce a series of wavelengths and excites surface Plasmon resonance at the fiber tip. SPR sensor was immersed into media with different refractive indexes in the range )1-1.58( including their similar Plasmon resonance wavelength shifts were saved by optical spectrum analyzer and noticed reflected light on a personal computer. Experimental results that obtained show there is a redshift when increasing the refractive index of solutions and sensitivity reach 298nm/ RIU, and resolution 4.31x .

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SURFACE PLASMON RESONANCE SENSOR OF SILVER FILM BASED ON KRETCHMANN CONFIGURATION

Jurnal Teknologi ◽

10.11113/jt.v76.5834 ◽

2015 ◽

Vol 76 (13) ◽

Cited By ~ 1

Author(s):

Hood-Hong Ley ◽

Asiah Yahaya ◽

Yusof Munajat

Keyword(s):

Surface Plasmon Resonance ◽

Film Thickness ◽

Surface Plasmon ◽

Plasmon Resonance ◽

Silver Film ◽

Incident Angle ◽

Theoretical Simulation ◽

Spr Sensor ◽

Resonance Sensor ◽

Instrumental Resolution

Performance of a surface plasmon resonance (SPR) sensor based on Kretchmann configuration for silver (Ag) film is evaluated via theoretical simulation. The film thickness and incident angle are varied to obtain the SPR wavelength in the range of 500-550 nm. Shift of SPR wavelength with refractive index of the dielectric defines the sensitivity whereas the resolution is obtained from the ratio of the instrumental resolution to the sensitivity. The SPR sensor shows increasing sensitivity for thicker film however the absorption magnitudes of such films are high and unfavourable for data acquisition. Film thickness of 45 nm and 50 nm which has good sensitivity and resolution with high absorbance magnitude of the SPR wavelength is the best thickness to be employed for sensing purpose.

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Effects of gold film thickness on spectrum profile and sensitivity of a multimode-optical-fiber SPR sensor

Sensors and Actuators B Chemical ◽

10.1016/j.snb.2008.01.003 ◽

2008 ◽

Vol 132 (1) ◽

pp. 26-33 ◽

Cited By ~ 101

Author(s):

Hitoshi Suzuki ◽

Mitsunori Sugimoto ◽

Yoshikazu Matsui ◽

Jun Kondoh

Keyword(s):

Optical Fiber ◽

Film Thickness ◽

Gold Film ◽

Multimode Optical Fiber ◽

Spr Sensor

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Dual-detection-parameter SPR sensor based on graded index multimode fiber

Sensors and Actuators A Physical ◽

10.1016/j.sna.2021.113360 ◽

2022 ◽

pp. 113360

Author(s):

Chunlan Liu ◽

Ping Wu ◽

Yong Wei ◽

Bo Li ◽

Yudong Su ◽

...

Keyword(s):

Multimode Fiber ◽

Graded Index ◽

Spr Sensor ◽

Dual Detection

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Enhanced sensitivity of fiber SPR sensor by metal nanoparticle

Sensor Review ◽

10.1108/sr-12-2019-0310 ◽

2020 ◽

Vol 40 (3) ◽

pp. 355-361 ◽

Cited By ~ 1

Author(s):

Chunlan Liu ◽

Yang Gao ◽

YaChen Gao ◽

Yong Wei ◽

Ping Wu ◽

...

Keyword(s):

Refractive Index ◽

Metal Nanoparticles ◽

Dynamic Range ◽

Cone Angle ◽

Fiber Surface ◽

Metal Nanoparticle ◽

Surface Plasma Resonance ◽

Content Type ◽

Spr Sensor ◽

Enhanced Sensitivity

Purpose This paper aims to clarify the relationship between the performance of the metal nanoparticles and the sensitivity of the fiber surface plasma resonance (SPR) sensor. It proposes modeling the sensing effects of a single-mode fiber SPR sensor with a cone angle structure decorated with metal nanoparticles. This study uses the metal nanoparticles to the realize enhanced sensitivity of refractive index sensing. Design/methodology/approach This paper opted for an exploratory study using a simulation approach of finite-difference time-domain (FDTD). Specifically, the effect of size, the material and the shape of the metal nanoparticle on sensing performance are investigated theoretically. Findings In conclusion, it is evident that the localized SPR (LSPR) effect weakens as the diameter of the gold nanosphere increases, the SPR effect enhances and the SPR sensitivity increases first and then decreases. The metal nanoparticle with the different materials and different shapes also have different LSPR and SPR sensitivity and wavelength length dynamic range. The investigation shows that, by changing parameters, the reflection spectra of the fiber SPR sensor exhibit an obvious transition from LSPR to SPR characteristics, and enhanced sensitivity of the refractive index is realized. Originality/value This paper fulfills an identified need to study how the sensitivity of the fiber SPR sensor can be enhanced by the metal nanoparticle. After the optimization of parameters, the sensitivity of 5,140 nm/RIU is achieved, which provides a new research direction for sensitivity enhancement of fiber SPR sensor.

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Investigation of the Possibility to Use Ge p-i-n Photodiodes in Infrared SPR Sensors

European Journal of Applied Physics ◽

10.24018/ejphysics.2021.3.4.95 ◽

2021 ◽

Vol 3 (4) ◽

pp. 38-42

Author(s):

Artem Fedorenko ◽

Glib Dorozinsky ◽

Hanna Dorozinska ◽

Natalia Kachur ◽

Volodymyr Maslov

Keyword(s):

Surface Plasmon Resonance ◽

Near Infrared ◽

Dynamic Range ◽

Gold Film ◽

Infrared Range ◽

Optical Scheme ◽

Thin Gold Film ◽

Spr Sensor ◽

Sensor Device ◽

Near Infrared Range

Considered in this work are the possibility and advantages of applying a Ge photodiode to measure the surface plasmon resonance (SPR) in the near infrared range (IR). The investigations were performed using the prototype of IR SPR refractometer that operates with two fixed wavelengths (1310 and 1552 nm) for excitation of surface plasmons in a thin gold film in the Kretschmann optical scheme. The obtained results of experiments enabled us to draw the conclusion that application of the Ge photodiode in the SPR sensor at the wavelength 1.5 µm allows increasing the sensitivity and response magnitude as well as widening the dynamic range of this sensor device.

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Cascaded distributed multichannel fiber SPR sensor based on gold film thickness adjustment approach

Sensors and Actuators A Physical ◽

10.1016/j.sna.2017.09.038 ◽

2017 ◽

Vol 267 ◽

pp. 526-531 ◽

Cited By ~ 10

Author(s):

Yu Zhang ◽

Peibo Liang ◽

Yushan Wang ◽

Yaxun Zhang ◽

Zhihai Liu ◽

...

Keyword(s):

Film Thickness ◽

Gold Film ◽

Spr Sensor

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1 Gbit/s full-duplex bidirectional optical data transmission over 500 m of 50 μm-core graded-index multimode fiber with novel monolithically integrated transceiver

33rd European Conference and Exhibition on Optical Communication - ECOC 2007 ◽

10.1049/ic:20070440 ◽

2007 ◽

Author(s):

M. Stach ◽

F. Rinaldi ◽

D. Wahl ◽

D. Rimpf ◽

S. Lorch ◽

...

Keyword(s):

Data Transmission ◽

Full Duplex ◽

Optical Data ◽

Multimode Fiber ◽

Monolithically Integrated ◽

Graded Index

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Engineering Cyanobacterial Cell Morphology for Enhanced Recovery and Processing of Biomass

Applied and Environmental Microbiology ◽

10.1128/aem.00053-17 ◽

2017 ◽

Vol 83 (9) ◽

Cited By ~ 15

Author(s):

Adam Jordan ◽

Jenna Chandler ◽

Joshua S. MacCready ◽

Jingcheng Huang ◽

Katherine W. Osteryoung ◽

...

Keyword(s):

Cell Division ◽

Cell Morphology ◽

Dynamic Range ◽

Enhanced Recovery ◽

Downstream Processing ◽

Crop Species ◽

Content Type ◽

Alternative Crop ◽

Cell Harvesting ◽

Broad Dynamic Range

ABSTRACT Cyanobacteria are emerging as alternative crop species for the production of fuels, chemicals, and biomass. Yet, the success of these microbes depends on the development of cost-effective technologies that permit scaled cultivation and cell harvesting. Here, we investigate the feasibility of engineering cell morphology to improve biomass recovery and decrease energetic costs associated with lysing cyanobacterial cells. Specifically, we modify the levels of Min system proteins in Synechococcus elongatus PCC 7942. The Min system has established functions in controlling cell division by regulating the assembly of FtsZ, a tubulin-like protein required for defining the bacterial division plane. We show that altering the expression of two FtsZ-regulatory proteins, MinC and Cdv3, enables control over cell morphology by disrupting FtsZ localization and cell division without preventing continued cell growth. By varying the expression of these proteins, we can tune the lengths of cyanobacterial cells across a broad dynamic range, anywhere from an ∼20% increased length (relative to the wild type) to near-millimeter lengths. Highly elongated cells exhibit increased rates of sedimentation under low centrifugal forces or by gravity-assisted settling. Furthermore, hyperelongated cells are also more susceptible to lysis through the application of mild physical stress. Collectively, these results demonstrate a novel approach toward decreasing harvesting and processing costs associated with mass cyanobacterial cultivation by altering morphology at the cellular level. IMPORTANCE We show that the cell length of a model cyanobacterial species can be programmed by rationally manipulating the expression of protein factors that suppress cell division. In some instances, we can increase the size of these cells to near-millimeter lengths with this approach. The resulting elongated cells have favorable properties with regard to cell harvesting and lysis. Furthermore, cells treated in this manner continue to grow rapidly at time scales similar to those of uninduced controls. To our knowledge, this is the first reported example of engineering the cell morphology of cyanobacteria or algae to make them more compatible with downstream processing steps that present economic barriers to their use as alternative crop species. Therefore, our results are a promising proof-of-principle for the use of morphology engineering to increase the cost-effectiveness of the mass cultivation of cyanobacteria for various sustainability initiatives.

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