The Experts below are selected from a list of 186 Experts worldwide ranked by ideXlab platform
Rafael Casquel - One of the best experts on this subject based on the ideXlab platform.
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Slot-waveguide Biochemical Sensor
Optics Letters, 2007Co-Authors: Carlos Angulo Barrios, B. Sanchez, Kristinn B Gylfason, Hans Sohlstrom, Amadeu Griol, Maria Holgado, Rafael CasquelAbstract:We report an experimental demonstration of an integrated Biochemical Sensor based on a slot-waveguide microring resonator. The microresonator is fabricated on a Si3N4-SiO2 platform and operates at a wavelength of 1.3 μm. The transmission spectrum of the Sensor is measured with different ambient refractive indices ranging from n=1.33 to 1.42. A linear shift of the resonant wavelength with increasing ambient refractive index of 212 nm/refractive index units (RIU) is observed. The Sensor detects a minimal refractive index variation of 2×10−4 RIU.
Carlos Angulo Barrios - One of the best experts on this subject based on the ideXlab platform.
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analysis and modeling of a silicon nitride slot waveguide microring resonator Biochemical Sensor
Proceedings of SPIE the International Society for Optical Engineering, 2009Co-Authors: Carlos Angulo BarriosAbstract:The performance of a recently demonstrated silicon nitride slot-waveguide microring resonator Biochemical Sensor is analyzed. The slot-waveguide Sensor is optically modeled by using finite element method, full-vectorial and semi-vectorial finite-difference beam propagation methods. Numerical calculations are discussed and compared to the Sensor experimental performance. This study includes homogeneous sensing -by using different aqueous solutions-, surface sensing -due to both, surface etching and biomolecular layer adhesion-, and power coupling characteristics of the microring Sensor. It is found that all of the aforementioned numerical methods provide good agreement with the experimental homogeneous sensitivity, surface etching sensitivity and power transmission coefficient at the resonator coupling. The analysis of the surface sensitivity due to biomolecular layer adhesion suggests biomolecule polymerization on the surface of the actual device. These results demonstrate the suitability of the proposed numerical optical models and indicate that the slot-waveguide microring device can be fully wetted with aqueous analytes, which is desirable for sensing and optofluidic applications at the nanoscale.
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Slot-waveguide Biochemical Sensor
Optics Letters, 2007Co-Authors: Carlos Angulo Barrios, B. Sanchez, Kristinn B Gylfason, Hans Sohlstrom, Amadeu Griol, Maria Holgado, Rafael CasquelAbstract:We report an experimental demonstration of an integrated Biochemical Sensor based on a slot-waveguide microring resonator. The microresonator is fabricated on a Si3N4-SiO2 platform and operates at a wavelength of 1.3 μm. The transmission spectrum of the Sensor is measured with different ambient refractive indices ranging from n=1.33 to 1.42. A linear shift of the resonant wavelength with increasing ambient refractive index of 212 nm/refractive index units (RIU) is observed. The Sensor detects a minimal refractive index variation of 2×10−4 RIU.
Maria C Derosa - One of the best experts on this subject based on the ideXlab platform.
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high resolution grating assisted surface plasmon resonance fiber optic aptaSensor
Methods, 2013Co-Authors: Jacques Albert, Sandrine Lepinay, Christophe Caucheteur, Maria C DerosaAbstract:Abstract A surface plasmon resonance Biochemical Sensor based on a tilted fiber Bragg grating imprinted in a single mode fiber core is demonstrated. A 30–50 nm thick gold coating on the cladding of the fiber provides the support for surface plasmon waves whose interaction with attached biomolecules is monitored at near infrared wavelengths near 1550 nm. The transmission spectrum of the Sensor provides a fine comb of narrowband resonances that overlap with the broader absorption of the surface plasmon and thus provide a unique tool to measure small shifts of the plasmon with high accuracy. The attachment on the gold surfaces of aptamers with specific affinities for proteins provides the required target-analyte system and is shown to be functional in the framework of our sensing device. The implementation of the Sensor either as a stand-alone device or as part of a multi-Sensor platform is also described.
Daoquin Liu - One of the best experts on this subject based on the ideXlab platform.
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wide range ultra compact and high sensitivity ring resonator Biochemical Sensor with cmos compatible hybrid plasmonic waveguide
Optics Express, 2021Co-Authors: Yan Yang, Fujun Sun, Peng Zhang, Bo Tang, Ruonan Liu, Daoquin LiuAbstract:A ring resonator-based biochemistry Sensor with a wide range, ultra-compact footprint, and high sensitivity is proposed, which utilizes a suspended slot hybrid plasmonic (SSHP) waveguide. The waveguide consists of a suspended Si nanowire separated from a Cu metal surface by a nanoscale air gap. The hybridization of fundamental mode of a Si channel waveguide with the surface plasmon polariton (SPP) mode of Cu-Si interface achieves a strong light confinement, high waveguide sensitivity (Sw), and low optical loss, showing a great potential in integrated optical Sensor. The sensitivity, the detection limit and the detection range of the SSHP waveguide-based biochemistry Sensor with a miniaturized radius of 1 µm are numerically demonstrated as 458.1 nm/RIU, 3.7 × 10−5 RIU and 0.225 RIU, respectively. These superior performances as well as the fully CMOS compatibility enable the integrated optical sensing applications.
Yuanjiang Xiang - One of the best experts on this subject based on the ideXlab platform.
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sensitivity enhancement of a surface plasmon resonance with tin selenide snse allotropes
Sensors, 2019Co-Authors: Yanzhao Liang, Yuting Zhao, Yuanjiang XiangAbstract:Single layers of tin selenide (SnSe), which have a similar structure as graphene and phosphorene, also show excellent optoelectronic properties, and have received much attention as a two-dimensional (2D) material beyond other 2D material family members. Surface plasmon resonance (SPR) Sensors based on three monolayer SnSe allotropes are investigated with the transfer matrix method. The simulated results have indicated that the proposed SnSe-containing Biochemical Sensors are suitable to detect different types of analytes. Compared with the conventional Ag-only film Biochemical Sensor whose sensitivity is 116°/RIU, the sensitivities of these SnSe-based Biochemical Sensors containing α-SnSe, δ-SnSe, e-SnSe, were obviously increased to 178°/RIU, 156°/RIU and 154°/RIU, respectively. The diverse bioSensor sensitivities achieved with these three SnSe allotropes suggest that these 2D materials can adjust SPR Sensor properties.
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sensitivity enhancement by using few layer black phosphorus graphene tmdcs heterostructure in surface plasmon resonance Biochemical Sensor
Sensors and Actuators B-chemical, 2017Co-Authors: Jun Guo, Qingkai Wang, Xiaoyu Dai, Yuanjiang Xiang, Dianyuan FanAbstract:Abstract The heterostructure of two-dimensional (2D) materials are promising and useful in the field of surface plasmon resonance (SPR) Biochemical Sensors. To enhance the sensitivity, we design a novel SPR Biochemical Sensor by using heterostructures of few-layer black phosphorus (BP) and graphene/transition metal dichalcogenides (TMDCs). The SPR Biochemical Sensor based on the different heterostructures of BP and graphene/TMDCs are analyzed, and the highest sensitivity with 279°/RIU for the heterostructure of BP and bilayer WSe2 is obtained. Moreover, the proposed Biochemical Sensor can be used to detect the analyte with different refractive index. The most prominent advantage of the proposed structure is its high sensitivity. The maximum sensitivity of our proposed SPR Biochemical Sensor is about 2.4 times of the conventional Biochemical Sensor. We believe that this Biochemical Sensor could find potential applications in chemical examination, medical diagnosis and biological detection.