scispace - formally typeset
Proceedings ArticleDOI: 10.1109/WRAP.2015.7806005

Designing a refractive index based biosensor using a photonic quasi-crystal fiber

01 Dec 2015-pp 1-4
Abstract: We design a ten-fold photonic quasi-crystal fiber using finite element method. Further, we explore various optical characteristics and exploit them for realizing a biosensor. We achieve a maximum refractive index sensitivity of 29000 nm/RIU and a resolution of 3.4 × 10−6 RIU a sensing range of 1.47–1.48. more

Topics: Photonic-crystal fiber (62%), Graded-index fiber (60%), Microstructured optical fiber (60%) more

Journal ArticleDOI: 10.1109/JSEN.2020.3013289
Bao-Fei Wan1, Ziwei Zhou1, Yi Xu1, Haifeng Zhang1Institutions (1)
Abstract: In this article, a structure based on one-dimensional photonic crystals that can be used for both angle sensing and refractive index sensing is proposed, which is achieved by optical Tamm state. Under Bragg scattering, its features are investigated by the transfer matrix method. This sensing structure is based on a multi-frequency absorption structure, which can achieve an absorption rate higher than 0.9 for three to four frequency points at the same time. The studied results demonstrate that the absorption peaks of such an absorption structure can be changed from three to four by adjusting the number of periods and silver layer thickness. Absorption peaks can occur red and blue shifts employing tailoring the thickness of defect and the angle of the incident light. By altering the thickness of the defect and the number of periods, the interval between the absorption peaks can be dominated. They are all with high-quality factors and can be used to bring about a high absorption sensor for the refractive index or angle. When it acts as a refractive index sensor, the operating range can cover from 2 to 2.7, whose sensitivity and average figure of merit are 32.3 THz/RIU and 100. If the presented device is used as an angle sensor, those values will become 0.5 THz/degree and 1.2, and its measuring range is from 25° to 70°. It can be said that the emergence of this special sensing structure will be possible to have a broad application prospect in the field of measurement. more

Topics: Absorption (electromagnetic radiation) (56%), Refractive index (53%), Bragg's law (53%) more

14 Citations

Journal ArticleDOI: 10.1016/J.YOFTE.2019.102083
Abstract: Optical sensing has undergone tremendous advancements with the advent of photonic crystal fibers (PCFs). Similarly, optical sensing utilizing surface plasmon resonance (SPR) operation has produced remarkable outcomes and new paradigms for providing prompt and label-free platforms for ultra-sensitive and high-resolution determinations in chemical, biological, and related sensing applications. Here we review refractive index photonic crystal fiber surface plasmon resonance biosensors (RI PCF SPRBs) with a focus on low, high, and wide-ranged RI PCF SPRBs. A performance comparison based on operating refractive index range amongst various RI PCF SPRBs shows that, to date, most of the RI PCF SPRBs proposed and/or fabricated belong to the high index category. Due to their extensive operating range, wide-ranged RI PCF SPRBs can function both as low and as high RI PCF SPRBs making them more attractive for lab-on-photonic crystal fiber (LOPCF), lab-in-photonic crystal fiber (LIPCF), and allied applications, where one or more laboratory functions are scaled to a single device for in vitro or in vivo screening and analysis. It is suggested that future research should continue to improve upon sensing metrics based on innovativeness not only in core and cladding designs but also in optimization of structural parameters and implementation of new plasmonic materials such as silicene, germanene, and phosphorene whose growths have been demonstrated recently. more

9 Citations

Journal ArticleDOI: 10.1109/JSEN.2021.3058224
Abstract: We present a new quasi D-shaped plasmonic photonic crystal fiber (PCF) microsensor with dual polarization for back-to-back measurement of refractive index (RI) and temperature. The PCF structure of the microsensor is form birefringent and supports two orthogonal polarizations for independent probing of both RI and temperature variations. Thin layers of tantalum pentoxide (Ta2O5) and gold (Au) are applied to the side-polished plane to form the RI sensing section. Furthermore, four micro air holes in the lower part of its outer cladding ring are gold-coated and selectively infiltrated with a temperature-sensitive liquid. A detailed investigation and numerical analyses of the coupling characteristics and sensing responses are presented using the finite element method (FEM) with a circular perfectly matched layer (PML). The RI metrics show a maximum wavelength sensitivity of 5000 nm/RIU and a maximum amplitude sensitivity of 266.54 RIU−1 from 1.35 to 1.46 RI range in the specified operating wavelength range of 1.25- $1.65~\mu \text{m}$ . The corresponding RI resolution is $2.0\times 10^{-5}$ RIU. For the temperature sensing metrics, a maximum amplitude sensitivity of $4.8\times 10^{-2}\,\,^\circ \text{C}^{-1}$ , a maximum wavelength sensitivity of 3.0 nm/°C, and a maximum resolution of $3.33\times 10^{-2}\,\,^{\circ }\text{C}$ from −50°C to 50°C is achieved. With appropriate instrumentation incorporating a polarization selector, the microsensor can double as a real-time simultaneous multiparameter sensor. Applications for the proposed microsensor can be found in molecular science, medical measurement and analysis, terrestrial environmental engineering and data assessment, aquatic ecosystem investigations, pharmaceutical and alimentary process control and validation, cryogenic studies, and several others. more

3 Citations


Book ChapterDOI: 10.1017/CBO9781139207249.009


01 Jan 2012-

123,310 Citations

Open accessJournal ArticleDOI: 10.1364/OE.14.011616
Alireza Hassani1, Maksim Skorobogatiy1Institutions (1)
27 Nov 2006-Optics Express
Abstract: The concept of a Microstructured Optical Fiber-based Surface Plasmon Resonance sensor with optimized microfluidics is proposed. In such a sensor plasmons on the inner surface of large metallized channels containing analyte can be excited by a fundamental mode of a single mode microstructured fiber. Phase matching between plasmon and a core mode can be enforced by introducing air filled microstructure into the fiber core, thus allowing tuning of the modal refractive index and its matching with that of a plasmon. Integration of large size microfluidic channels for efficient analyte flow together with a single mode waveguide of designable effective refractive index is attractive for the development of integrated highly sensitive MOF-SPR sensors operating at any designable wavelength. more

315 Citations

Journal ArticleDOI: 10.1364/JOSAB.24.001423
Alireza Hassani1, Maksim Skorobogatiy1Institutions (1)
Abstract: Design strategies for microstructured-optical-fiber (MOF-) based surface-plasmon-resonance (SPR) sensors are presented. In such sensors, plasmons on the inner surface of the large metallized channels containing analyte can be excited by a fundamental mode of a single-mode microstructured fiber. Phase matching between a plasmon and a core mode can be enforced by introducing air-filled microstructures into the fiber core. Particularly, in its simplest implementation, the effective refractive index of a fundamental mode can be lowered to match that of a plasmon by introducing a small central hole into the fiber core. Resolution of the MOF-based sensors is demonstrated to be as low as 3×10−5 RIU, where RIU means refractive index unit. The ability to integrate large-size microfluidic channels for efficient analyte flow together with a single-mode waveguide of designable modal refractive index is attractive for the development of integrated highly sensitive MOF-SPR sensors operating at any designable wavelength. more

Topics: Microstructured optical fiber (63%), Photonic-crystal fiber (62%), Fiber Bragg grating (58%) more

225 Citations

Open accessJournal ArticleDOI: 10.1103/PHYSREVB.77.033417
30 Jan 2008-Physical Review B
Abstract: We report the fabrication of triangular lattices of parallel gold and silver nanowires of high optical quality, with diameters down to $500\phantom{\rule{0.3em}{0ex}}\mathrm{nm}$ and length-to-diameter ratios as high as 100 000. The nanowires are supported by a silica glass matrix and are disposed around a central solid glass core, i.e., a missing nanowire. These centimeter-long structures make it possible to trap light within an array of nanowires and characterize the plasmon resonances that form at specific optical frequencies. Such nanowire arrays have many potential applications, e.g., imaging on the subwavelength scale. more

Topics: Nanowire (58%), Plasmon (55%)

216 Citations

Open accessJournal ArticleDOI: 10.1364/OE.16.008427
09 Jun 2008-Optics Express
Abstract: We propose a novel surface-plasmon-resonance sensor design based on coating the holes of a three-hole microstructured optical fiber with a low-index dielectric layer on top of which a gold layer is deposited. The use of all three fiber holes and their relatively large size should facilitate the fabrication of the inclusions and the infiltration of the analyte. Our numerical results indicate that the optical loss of the Gaussian guided mode can be made very small by tuning the thickness of the dielectric layer and that the refractive-index resolution for aqueous analytes is 1×10-4. more

Topics: Microstructured optical fiber (70%), Photonic-crystal fiber (65%), Fiber optic sensor (63%) more

204 Citations