Enhancement of sensitivity in optical waveguide sensors using left-handed materials

Theoretical Modeling of a Metal-Clad Planar Waveguide Based Biosensors for the Detection of Pseudomonas-Like Bacteria

“…Using the thin high contrast index material such as silicon-on-insulation (SIO) photonic wire based technique, Densmore et al [20] have shown that simple SOI-wire-waveguide based EF sensors can provide a higher sensitivity to surface adsorption and bulk homogeneous index change than planar waveguide sensor because such high index contrast waveguides give large and strongly localized electric field distribution with penetration depth much larger than the 200 nm needed for better biological sensing [14]. Despite these advances [21][22][23][24][25] much more work needs to be done before optical fiber based-biosensors become commercially viable option for sensing. Moreover the attachment of marine Pseudomonas sp.…”

Dispersion properties of slab waveguides with double negative material guiding layer and nonlinear substrate

“…In this case, the evanescent field in the surrounding media is enhanced. This property serves in slab waveguide applications requiring the enhancement of the evanescent field, such as optical waveguide sensing [11][12][13][14]. The principle of operation of optical waveguide sensors is based on the evanescent tail of the modal field in the cover medium.…”

“…Moreover, the wave vector k, the electric field vector E, and the magnetic field vector H form a left-handed system. DNMs have been studied extensively for a set of possible applications [11][12][13][14][15][16]. One of the main applications of DNMs is the so-called superlens, proposed by Pendry in 2000 [17].…”

Microwave Sensor Using Metamaterials

“…We have verified that the metamaterials can amplify evanescent waves, and the sensitivity of sensors with TM mode can be dramatically enhanced compared with the conventional three-layer TM wave waveguide sensor without metamaterials. The other works about slab waveguide sensor can also be found in the work of Qing and Taya et al (Qing et al, 2004;Taya et al, 2009) However, to the best of our knowledge, there is no report about experimental results till now.…”