Enhancement of sensitivity in hexagonal ring resonator using localized surface plasmon resonance for bio-chemical sensors

Kim, Dohyun; Kim, Sun-Ho; Jeon, Su-Jin; Kim, Eudum; Lee, Jae-Sang; Choi, Young‐Wan

doi:10.1117/12.2506595

Cited by 2 publications

(3 citation statements)

References 8 publications

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“…The splitting ratio of the MMI is determined by 5:5. This is because the back-reflection of the MMI is minimized at a splitting ratio of 5:5, which improves the performance of the S-bend resonator [17,21].…”

Section: Design Of S-bend Resonatormentioning

confidence: 99%

“…The resonator consisted of the SU-8 2002 polymer, which has a simple fabrication process and good optical transparency [16]. In addition, SU-8 has a smaller refractive index than other materials employed as waveguides, allowing wider line width design of waveguides with the same number of modes [17]. Furthermore, we designed the multi-mode waveguide-based S-bend resonator without multi-peaks, which yields a similar output transmission to a single-mode waveguide-based resonator for MODE simulation by using the variational finite-difference time-domain (varFDTD) method.…”

Section: Introductionmentioning

confidence: 99%

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Novel S-Bend Resonator Based on a Multi-Mode Waveguide with Mode Discrimination for a Refractive Index Sensor

Kim

Jeon

Lee

et al. 2019

Sensors

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In this paper, a multi-mode waveguide-based optical resonator is proposed for an integrated optical refractive index sensor. Conventional optical resonators have been studied for single-mode waveguide-based resonators to enhance the performance, but mass production is limited owing to the high fabrication costs of nano-scale structures. To overcome this problem, we designed an S-bend resonator based on a micro-scale multi-mode waveguide. In general, multi-mode waveguides cannot be utilized as optical resonators, because of a performance degradation resulting from modal dispersion and an output transmission with multi-peaks. Therefore, we exploited the mode discrimination phenomenon using the bending loss, and the resulting S-bend resonator yielded an output transmission without multi-peaks. This phenomenon is utilized to remove higher-order modes efficiently using the difference in the effective refractive index between the higher-order and fundamental modes. As a result, the resonator achieved a Q-factor and sensitivity of 2.3 × 103 and 52 nm/RIU, respectively, using the variational finite-difference time-domain method. These results show that the multi-mode waveguide-based S-bend resonator with a wide line width can be utilized as a refractive index sensor.

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Section: Design Of S-bend Resonatormentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Novel S-Bend Resonator Based on a Multi-Mode Waveguide with Mode Discrimination for a Refractive Index Sensor

Kim

Jeon

Lee

et al. 2019

Sensors

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“…In recent years, the chemical industry has seen a substanti al increase in attention, leading to significant challenges in chemical sensing technology. Surface plasmons (SPs) can be categorized into two distinct types: propagating surface plasmon polaritons (SPPs) in extended interfaces [1], and localized surface plasmons (LSPs) in structures with closed surface [2,34,49]. Owing to their perspective for subwavelength confinement at metal/dielectric interfaces at optical frequencies, they have attracted a considerable surge in attention in recent years [3,4].…”

Section: Introductionmentioning

confidence: 99%

Highly sensitive quarter-mode spoof localized plasmonic resonator for dual-detection RF microfluidic chemical sensor

Gholamian

Shabanpour

Cheldavi

2020

J. Phys. D: Appl. Phys.

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In this paper, benefitting from the presence of an ultrathin corrugated metal-insulator-metal ring resonator, for the first time, we proposed a dual-detection microfluidic chemical sensor based on quarter-mode spoof localized surface plasmon (LSP) resonator with higher sensitivity among all the dual/multichannel microwave chemical sensors. First, we study full-mode spoof plasmonic resonator and we show that the resonance modes of the quartermode structure are exactly one-fourth of the full-mode structure. By placing two asymmetric microfluidic channels in the strongest E-field regions, the capability of detecting two aqueous solutions is feasible. By utilizing a 85070E performance probe connected to vector network analyzer, we determined the relative permittivity and loss tangent of fluids under test. Then, the fabricated prototype was tested, and our experimental results collaborate well our simulation predictions. Our proposed RF sensor exhibits 87% growth in sensitivity (MHz/ε r ) compared with the most sensitive multichannel microwave chemical sensor that previously existed. Furthermore, we show that our elaborately designed sensor has the potential to detect chemicals with very close dielectric constant corresponding to 1,4-Dioxin, Cyclohexane, n-Hexane with the relative permittivity of 2.12, 2.012, 1.95, respectively.

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Enhancement of sensitivity in hexagonal ring resonator using localized surface plasmon resonance for bio-chemical sensors

Cited by 2 publications

References 8 publications

Novel S-Bend Resonator Based on a Multi-Mode Waveguide with Mode Discrimination for a Refractive Index Sensor

Novel S-Bend Resonator Based on a Multi-Mode Waveguide with Mode Discrimination for a Refractive Index Sensor

Highly sensitive quarter-mode spoof localized plasmonic resonator for dual-detection RF microfluidic chemical sensor

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