On-Chip Chemical Sensing Using Slot-Waveguide-Based Ring Resonator

Mere, Viphretuo; Muthuganesan, Hemalatha; Kar, Yusuf; Kruijsdijk, C.P.J.W. van; Selvaraja, Shankar Kumar

doi:10.1109/jsen.2020.2974502

Cited by 36 publications

(16 citation statements)

References 24 publications

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“…Note that the normalized power (NP) (

in the slot region slightly decreased with increasing slot width. The result was comparable to what was reported in the channel slot waveguide whose PCF was around 49% at 1550 nm [ 5 ].…”

Section: Simulation Results and Discussionsupporting

confidence: 89%

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Investigation of an In-Line Slot Waveguide Sensor Built in a Tapered D-Shaped Silicon-Cored Fiber

Lin

Wang

2021

Sensors

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An in-line slot waveguide sensor built in a polished flat platform of a D-shaped silicon cored fiber with a taper coupled region is proposed and investigated thoroughly. Simulation results show that the single-mode light field sustained in the silicon cored fiber can be efficiently transferred to the slot waveguides through the tapered region. The geometry parameters of the slot waveguide sensors are optimized to have the corresponding highest power confinement factors and the resultant sensor sensitivities. The three-slot waveguide sensor is found to have the best performance among one-, two- and three-slot waveguides at the mid-IR wavelength.

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“…Note that the normalized power (NP) (

in the slot region slightly decreased with increasing slot width. The result was comparable to what was reported in the channel slot waveguide whose PCF was around 49% at 1550 nm [ 5 ].…”

Section: Simulation Results and Discussionsupporting

confidence: 89%

“…The light–analyte interaction was enhanced in the slot region compared to the rib/strip silicon waveguides. Since then, slot waveguides have been developed with significant increases in sensing sensitivity for many applications such as label-free molecule detection [ 4 , 5 ].…”

Section: Introductionmentioning

confidence: 99%

Investigation of an In-Line Slot Waveguide Sensor Built in a Tapered D-Shaped Silicon-Cored Fiber

Lin

Wang

2021

Sensors

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“…The sensitivities of the refractive index sensors can be significantly improved to 3456 nm/RIU [32], 5866 nm/RIU [33], 3000 nm/RIU [44] and 3552 nm/RIU [45] by two cascaded MRRs, three cascaded MRRs, mid-infrared MRRs and MRR-Mach Zehnder interferometer (MZI), respectively. However, the sizes of the above devices are relatively large [29,32,33,42,44,45]. Compared with the above devices, the proposed cascaded double-microring sensor could realize an ultrahigh sensitivity (7061 nm/RIU) and a low LOD (1.74×10 -5 RIU).…”

Section: B Cascaded Double-microring Sensormentioning

confidence: 99%

On-Chip Refractive Index Sensor With Ultra-High Sensitivity Based on Sub-Wavelength Grating Racetrack Microring Resonators and Vernier Effect

Liu

et al. 2022

IEEE Photonics J.

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An approach to optimize the sensitivity and the limit of detection of on-chip refractive index sensor is proposed and demonstrated based on sub-wavelength grating racetrack microring resonator and Vernier effect. The sub-wavelength grating waveguide can reduce the structure limitation of the light field, which is beneficial to enhancing the interaction between the photon and analyte. By optimizing the parameters of the subwavelength grating racetrack microring resonator, the sensitivity of the sensor could be significantly improved to 664 nm/RIU. Subsequently, capitalizing the Vernier effect, a two cascaded microring-based refractive index sensor is designed. Owing to the Vernier effect, the wavelength spacings among the overlapped peaks could be effectively amplified more than ten times, leading to a high performance. The results demonstrate that an ultra-high sensitivity of 7061 nm/RIU and a low limit of detection of 1.74× 10 −5 RIU. With the advantages of ultra-high sensitivity and low limit of detection, the integrated device has important value in the fields of environmental monitoring and biosensors.

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“…With the strong confinement of mode in the low index slot region, low power consumption and better flexibility, it appears to be a better replacement for conventional waveguide ring resonators. [25][26][27][28] A slot waveguide ring resonator based on chalcogenide glasses have been proposed by Zhang et al 29 and attained a Qfactor of 10 4 and sensitivity of 471 nm/RIU. A slot waveguide and slot ring resonator based on GeAsSe chalcogenide has been proposed by Ashok et al 30 with a Q-factor of 6.5 × 10 3 and sensitivity of 42 nm/RIU.…”

Section: Introductionmentioning

confidence: 99%

“…Even though different ring resonator combinations for sensing have been developed over the years, the ring resonators with slot waveguide coupling has a particular importance here. With the strong confinement of mode in the low index slot region, low power consumption and better flexibility, it appears to be a better replacement for conventional waveguide ring resonators 25–28 . A slot waveguide ring resonator based on chalcogenide glasses have been proposed by Zhang et al 29 and attained a Q‐factor of 10 4 and sensitivity of 471 nm/RIU.…”

Section: Introductionmentioning

confidence: 99%

Design and analysis of ring resonator with slot waveguide coupling into a slab ring construction for refractive index sensing applications

Kulanthaivel,

Ashok

2023

Micro & Optical Tech Letters

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We proposed a theoretical study of silicon nitride ring resonator configuration for the application of refractive index sensing. In this paper, a slot waveguide has been used to couple the light into the slab ring structure. We have designed the slab ring and slot waveguides with silicon nitride (Si3N4) on a substrate made of silica (SiO2). Transverse electric (TE) mode has been used for the entire analysis at an operating wavelength of 1550 nm. The presented structure has been geometrically optimized to get the better transmission results. The design shows a resonance wavelength of 1538.74 nm when the cladding refractive index is equal to 1, which is placed at the top of the slab ring structure. We have also calculated the effect on the transmission curve for different waveguide parameters. For, the structure achieves a resonance wavelength around 1563.65 nm. The geometrically optimized structure achieved a Q‐factor of 750 and a sensitivity of 70 nm/RIU. In the proposed paper, the shift in the resonance of the transmission spectrum has been utilized to detect the Refractive Index (RI) changes on the surface of the ring. Therefore, the proposed structure can be used effectively in the applications of refractive index sensing.

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On-Chip Chemical Sensing Using Slot-Waveguide-Based Ring Resonator

Cited by 36 publications

References 24 publications

Investigation of an In-Line Slot Waveguide Sensor Built in a Tapered D-Shaped Silicon-Cored Fiber

Investigation of an In-Line Slot Waveguide Sensor Built in a Tapered D-Shaped Silicon-Cored Fiber

On-Chip Refractive Index Sensor With Ultra-High Sensitivity Based on Sub-Wavelength Grating Racetrack Microring Resonators and Vernier Effect

Design and analysis of ring resonator with slot waveguide coupling into a slab ring construction for refractive index sensing applications

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