A numerical analysis of a novel birefringent photonic crystal fiber (PCF) biosensor\ud constructed on the surface plasmon resonance (SPR) model is presented in this paper.\ud This biosensor configuration utilizes circular air holes to introduce birefringence into\ud the structure. This PCF biosensor model shows promise in the area of multiple detection\ud using HEx\ud 11 and HEy\ud 11 modes to sense more than one analyte. A numerical study of the biosensor\ud is performed in two interrogation modes: amplitude and wavelength. Sensor resolution\ud values with spectral interrogation yielded 5 10 5 RIU (refractive index units) for\ud HEx\ud 11 modes and 6 10 5 RIU for HEy\ud 11 modes, whereas 3 10 5 RIU for HEx\ud 11 modes\ud and 4 10 5 RIU for HEy\ud 11 modes are demonstrated for the amplitude interrogation

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In this paper, a novel design for a metamaterial lens (superlens) based on a Photonic Crystal (PC) operating at visible wavelengths is reported. The proposed superlens consist of a gallium phosphide (GaP) dielectric slab waveguide with a hexagonal array of silver rods embedded within the GaP dielectric. In-house 2DFDTD numerical method is used to design and optimize the proposed superlens. Several superlenses are designed and integrated within a same dielectric platform, promoting the proof-of-concept (POC) of possible construction of an array of superlenses (or sub-lenses to create an M-Lens) for light field imaging applications. It is shown that the concavity of the superlens and positioning of each sub-lens within the array strongly affects the performances of the image in terms of resolution. Defects and various geometrical shapes are introduced to construct and optimize the proposed superlenses and increase the quality of the image resolution. It is shown that the orientation of the active region (ellipse) along x and y axis has tremendous influence on the quality of image resolution. In order to investigate the performance characteristics of the superlenses, transmitted power is calculated using 2D FDTD for image projections at various distances (in x and y plane). It is also shown, how the proposed superlens structures could be fabricated using standard micro fabrication techniques such as electron beam lithography, inductively coupled Reactive ion etching, and glancing angle evaporation methods. To the best of our knowledge, these are the first reported POC of superlenses, integrated in a monolithic platform suitable for high imaging resolution that can be used for light field imaging applications at visible wavelength. The proposed superlenses (integrated in a single platform M-Lens) will have tremendous impact on imaging applications.

A TiO _{2} -coated optical fiber photoreactor was built and studied in order to optimize different parameters before the development of a multi-optical fiber reactor. The physico-chemical properties of the TiO _{2} film prepared by a sol-gel method on an optical fiber were first determined. A thickness of about 30 nm per layer and a roughness of 2 nm were estimated by ESEM and AFM, respectively. The refractive index of the TiO _{2} coating was determined by a simulation method. Then, the influences of the film thickness, coating length and coating volume on the light transmission within the fiber were investigated. The intensity of transmitted light was found to decrease exponentially as the volume of TiO _{2} increased. Afterward, the dependence of the photocatalytic degradation of hydroxybutanedioic acid on the incident light intensity, the TiO _{2} coating thickness and the coating volume was studied and modelized. The photocatalytic degradation was found to be stabilized above a TiO _{2} volume of 200 μ m ^{3} for a fiber of 1 mm and 100 μ m ^{3} for a fiber of 0.6 mm. Finally, a multi-fiber reactor was built and its degradation rate of hydroxybutanedioic acid was compared to that obtained in a single optical fiber reactor.