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Two-Dimensional Layered Nanomaterial-Based One-Dimensional Photonic Crystal Refractive Index Sensor.

ABSTRACT: One-dimensional photonic crystal (1DPC) sensors have emerged as contenders for traditional surface plasmon resonance sensors, owing to their potential for the detection of bigger molecules and particles due to their higher interaction volume in the sensing medium. Two-dimensional layered nanomaterials, most notably graphene and dichalcogenides (e.g., MoS?, MoSe?, WS?, and WSe?), have shown higher refractive index sensitivity because of their absorption as well as adsorption property. The proposed configuration of 1DPC presented consists of alternate layers of the aforementioned nanomaterials and silicon. The performance parameters, namely the sensitivity, resolution, quality factor, and the evanescent field penetration depth, are calculated and compared with 1DPC having poly methyl methacrylate (PMMA) in place of silicon. Increased shift in resonance angle and quality factor are observed by replacing PMMA with silicon, but at the cost of decreased resolution. Further, our results show that although the sensitivity and quality factor of the 1DPC sensor is less than that of the conventional surface plasmon resonance sensor (SPR) with a gold thin film, it has much higher resolution and penetration depth to make it suitable for large molecules.

SUBMITTER: Maurya JB

PROVIDER: S-EPMC5877326 | biostudies-literature | 2018 Mar

REPOSITORIES: biostudies-literature

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Two-Dimensional Layered Nanomaterial-Based One-Dimensional Photonic Crystal Refractive Index Sensor.

Maurya Jitendra B JB François Alexandre A Prajapati Yogendra K YK

Sensors (Basel, Switzerland) 20180314 3

One-dimensional photonic crystal (1DPC) sensors have emerged as contenders for traditional surface plasmon resonance sensors, owing to their potential for the detection of bigger molecules and particles due to their higher interaction volume in the sensing medium. Two-dimensional layered nanomaterials, most notably graphene and dichalcogenides (e.g., MoS₂, MoSe₂, WS₂, and WSe₂), have shown higher refractive index sensitivity because of their absorption as well as adsorption property. The propose ...[more]

PMID: 29538332

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Project description:In recent decades, advances in biophotonics research have led to the development of numerous novel applications, particularly in the realm of diagnostic tools. Among these, one-dimensional photonic crystal biosensors have emerged as frequently utilized instruments for disease diagnosis and sensing. A significant body of research has focused on enhancing the efficiency of these biosensors. Recently, integration of Graphene and liquid crystal into a hybrid structure has been identified as a promising approach for the advancement of optical devices. This study presents a novel one-dimensional photonic crystal biosensor designed using the Kretschmann configuration, which incorporates Graphene nanolayers and a liquid crystal layer. The transfer matrix method was employed to calculate the projected band structure of the designed biosensor for different chemical potentials of the Graphene nanolayers. Additionally, the dispersion properties of the surface waves can be tuned by adjusting the liquid crystal director angle. By manipulating the adjustable parameters of the Graphene nanolayer and liquid crystal, modifications to the reflection spectrum can be achieved, facilitating an analysis of angular sensitivity and figure of merit. The results indicate that these parameters significantly influence sensitivity and figure of merit of the biosensor. Notably, increases in the chemical potential of the Graphene nanolayers, along with adjustments to the liquid crystal director angle, substantially enhance the performance of the biosensor. Our study achieved a maximum sensitivity of [Formula: see text] at a graphene chemical potential of [Formula: see text] and a liquid crystal orientation angle of [Formula: see text]. Additionally, a maximum figure of merit of [Formula: see text] was obtained at a chemical potential of [Formula: see text] and an orientation angle of [Formula: see text]. The proposed sensor is deemed suitable for practical applications due to its straightforward fabrication process and capability to operate at room temperature. Moreover, the properties of both the Graphene nanolayers and the liquid crystal layer in the biosensor can be readily adjusted, further contributing to its versatility and efficacy.

Dataset Information

Two-Dimensional Layered Nanomaterial-Based One-Dimensional Photonic Crystal Refractive Index Sensor.

Publications

Two-Dimensional Layered Nanomaterial-Based One-Dimensional Photonic Crystal Refractive Index Sensor.

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