By Massaro, A.; Akowuah, E.K.; Gorman, T.; Ademgil, H.; Haxha, S.; Robinson, G.K.; Oliver, J.V
Read Online or Download A Novel Compact Photomic Crystal Fibre Surface Plasmon Resonance Biosensor for an Aqueous Environment PDF
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Additional info for A Novel Compact Photomic Crystal Fibre Surface Plasmon Resonance Biosensor for an Aqueous Environment
Only the three cases enumerated above will be considered. 1 The (AB)16 type crystal with a A type defect layer (A is a dielectric material) a) b) c) d) Fig. 12. The variation of the position of the defect layer: a) (AB)8A(AB)8; b) (AB)9A(AB)7; c) (AB)10A(AB)6; d) (AB)11A(AB)5 The Optical Transmission of One-Dimensional Photonic Crystals Containing Double-Negative Materials 55 From the simulations it is observed that the best results are reached if the defect layer is inserted after 8 (AB) groups.
Due to existence of the cavities along the structure and as a result of the overlapping of the evanescent fields, light can be propagated through the CCWs . Actually, it was investigated theoretically and experimentally that CCWs exhibit more advantages over conventional optical waveguides. One of the most important features of CCW is that due to strong optical confinement in defect medium, and high slope of transmission at resonance wavelengths, group velocity at the edge of each resonance modes can be reduced considerably .
1 Optical transmission of 1D PC without defects In these experiments the thickness of the layers were kept comstant - dA =24mm and dB =6mm - and the frequency varied ω∈(0,9)GHz. As it is specified earlier there will be two cases: case 1 in which A is a dielectric material and case 2 in which A is an epsilon negative material. In both cases B is a double negative material (Ramakrishna, 2005). 1 Case 1: A is a dielectric material Figure 4 presents the optical transmission of the three types of the studied photonic crystals versus of the frequency of the light beam so that we can observe easily the band-gaps.