A plasmonic refractive index sensor with an ultrabroad dynamic sensing range

Cheng, Yu; Chang, Ya Ju; Chuang, Yu Ching; Huang, Bo; Chen, Chii Chang

doi:10.1038/s41598-019-41353-4

Cited by 18 publications

(9 citation statements)

References 25 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The terms of 'surface plasmon' and 'polariton' are respectively involved charge motion in highly conductive matter, and electromagnetic waves in the dielectric or vacuum. The materials which are frequently used in plasmonic structures are typically metals such as silver and gold, which are exploited in various applications such as filters [1][2][3], demultiplexers [4][5][6], sensors [7][8][9], and switches [10][11][12].…”

Section: Introductionmentioning

confidence: 99%

Tunable Mid-Infrared Graphene Plasmonic Cross-Shaped Resonator for Demultiplexing Application

Asgari

Fabritius

2020

Applied Sciences

View full text Add to dashboard Cite

In this study, a tunable graphene plasmonic filter and a two-channel demultiplexer are proposed, simulated, and analyzed in the mid-infrared (MIR) region. We discuss the optical transmission spectra of the proposed cross-shaped resonator and the two-channel demultiplexer. The transmission spectra of the proposed MIR resonator are tunable by change of its dimensional parameters and the Fermi energy of the graphene. Our proposed structures have a single mode in the wavelength range of 5-12 µm. The minimum full width at half maximum (FWHM) and the maximum transmission ratio of the proposed resonator respectively reached 220 nm and 55%. Simulations are performed by use of three-dimensional finite-difference time-domain (3D-FDTD) method. Coupled mode theory (CMT) is used to investigate the structure theoretically. The numerical and the theoretical results are in good agreement. The performance of the proposed two-channel demultiplexer is investigated based on its crosstalk. The minimum value of crosstalk reaches −48.30 dB. Our proposed structures are capable of providing sub-wavelength confinement of light waves, useful in applications in MIR region.

show abstract

Section: Introductionmentioning

confidence: 99%

Tunable Mid-Infrared Graphene Plasmonic Cross-Shaped Resonator for Demultiplexing Application

Asgari

Fabritius

2020

Applied Sciences

View full text Add to dashboard Cite

show abstract

“…Since the evanescent field changes with the background refractive index, the background refractive index can be obtained by measuring the output power of the waveguide. In Figure 2B [46], high linearity is achieved in the dynamic range of n = 1-2.36, considering the surface roughness of σ = 5 nm. The numerical resolution is as high as 4.53 × 10 −10 RIU and is the same for both gas and liquid situations.…”

Section: Integrated Waveguide-based Ri Sensorsmentioning

confidence: 93%

“…Additionally, interferometry configuration can partially suppress unwanted refractive index changes act on both branches, like temperature or pressure variations. Cheng et al [46] proposed a novel SPP sensor with an extensive dynamic range, high sensitivity, and compact structure numerically. This sensor includes a GaAs curved waveguide surrounding by an outer gold ring waveguide, as shown in Figure 2A [46].…”

Section: Integrated Waveguide-based Ri Sensorsmentioning

confidence: 99%

“…Cheng et al [46] proposed a novel SPP sensor with an extensive dynamic range, high sensitivity, and compact structure numerically. This sensor includes a GaAs curved waveguide surrounding by an outer gold ring waveguide, as shown in Figure 2A [46]. Since the evanescent field changes with the background refractive index, the background refractive index can be obtained by measuring the output power of the waveguide.…”

Section: Integrated Waveguide-based Ri Sensorsmentioning

confidence: 99%

See 1 more Smart Citation

One-Dimensional Plasmonic Sensors

Liu

2020

Front. Phys.

View full text Add to dashboard Cite

Recent advances in surface plasmon sensors have significantly reduced the limitations of conventional optical sensors. With the recent development of micro-and nano-fabrication technology, miniaturized one-dimensional structures become a promising platform for surface plasmon sensors for its compactness and simple structure. In this review, we describe the generation of surface plasmon polaritons and the resonance conditions. Then we categorize surface plasmon sensors by the physical quantities they detect, elaborating their working principle, performance, and current development. Finally, we summarize both limitations and advances of various design methods to provide an outlook on future directions of this field.

show abstract

“…There are many approaches used to measure the liquid refractive index, such as fiber Bragg grating [3], surface plasmon resonance (SPR) [4], interferometric technology [5], etc. However, the sensitivity and dynamic detection range of the refractive index measuring methods are limited [6]. Thus, we propose a cost-effective approach for sensing changes in refractive indices by using lossy mode resonance (LMR) effect to overcome this limitation.…”

Section: Introductionmentioning

confidence: 99%

Lossy Mode Resonance Sensors Fabricated by RF Magnetron Sputtering GZO Thin Film and D-Shaped Fibers

Tien

Mao

2020

Coatings

View full text Add to dashboard Cite

We demonstrate a new refractive index (RI) and salinity sensor based on a lossy mode resonance (LMR) effect which combines fiber-optic side-polishing and radio-frequency (RF) sputtering techniques. The side-polished fiber can enhance optical fibers to generate an evanescent field in sensing applications. Gallium-doped zinc oxide (GZO) thin films produce a high attenuation lossy mode resonance effect that permits a highly sensitive refractive index and salinity fiber sensor. GZO thin film was prepared by an RF magnetron sputtering method. The thickness of the D-shaped fiber sensing device was 74.7 μm, and a GZO film thickness of 67 nm was deposited on the polished surface of the D-shaped fiber to fabricate LMR type liquid salinity sensors. The sensitivity of 3637.8 nm/RIU was achieved in the RI range of 1.333 to 1.392. To investigate the sensitivities of LMR salinity sensors, the NaCl solution salinities of 0%, 50%, 100%, 150%, 200%, and 250% were measured in this work. The experimental result shows that the sensitivity of the salinity sensor is 0.964 nm per salinity unit (SU).

show abstract

A plasmonic refractive index sensor with an ultrabroad dynamic sensing range

Cited by 18 publications

References 25 publications

Tunable Mid-Infrared Graphene Plasmonic Cross-Shaped Resonator for Demultiplexing Application

Tunable Mid-Infrared Graphene Plasmonic Cross-Shaped Resonator for Demultiplexing Application

One-Dimensional Plasmonic Sensors

Lossy Mode Resonance Sensors Fabricated by RF Magnetron Sputtering GZO Thin Film and D-Shaped Fibers

Contact Info

Product

Resources

About