It is demonstrated that metallic horseshoe-shaped (also referred to as u-shaped) nanostructures can exhibit a magnetic resonance in the optical spectral range. This magnetic plasmon resonance is distinct from the purely geometric LC resonance occurring in perfectly conducting split rings because the plasmonic nature of the metal plays the dominant role. Similarly to the electrical surface plasm...

Copper oxide (CuO) allows the generation of lossy mode resonance (LMR) in a wide wavelength range optical spectrum, both visible and near-infrared (NIR). For this, it is necessary to use configuration based on lateral incidence light edge planar waveguide structure. On other hand, additional coatings tin (SnO2) agarose an increase sensitivity sensor, response breathing monitoring. The sensors w...

The localised surface plasmon resonance in gold nanoparticles can be used as the basis of a refractometric sensor. Usually, this is accomplished by monitoring a shift in wavelength of the resonance peak, a task which requires measurements over a range of wavelengths. Here we investigate a different scheme, in which interrogation of the sensor is carried out at a single wavelength. We have used ...

6.1 The basics of wave propagation 6.1/a Effects of changes in standard parameters 6.2 Feedback between outer hair cells 6.2/a Feedback topology 6.2/b Response of three rows of cells 6.3 Modeling squirting wave excitation of the OHC array 6.3/a Explicit solution of the many-cell problem: full wavelength resonance Results and derivations 6.3/b Explicit solution of the many-cell problem: half-wav...

A surface plasmon resonance based fiber optic probe has been fabricated using electron beam deposition. The fabricated probe has been characterized using sucrose solution. It has been observed that the resonance wavelength i.e. SPR wavelength increases with increasing concentration of sucrose solution. The experimental results so obtained have been compared with theoretically simulated model re...

We show that a buried oxide layer forming a current aperture in an all epitaxial vertical-cavity surface emitting laser has a profound influence on the optical and electrical characteristics of the device. The lateral index variation formed around the oxide current aperture leads to a shift in the cavity resonance wavelength. The resonance wavelength under the oxide layer can thus be manipulate...

Arrays of gold split rings with a 50-nm minimum feature size and with an LC resonance at 200 THz frequency (1.5 microm wavelength) are fabricated. For normal-incidence conditions, they exhibit a pronounced fundamental magnetic mode, arising from a coupling via the electric component of the incident light. For oblique incidence, a coupling via the magnetic component is demonstrated as well. More...

In this study, the sensitivity and the linearity of the un-coated and TiO2-coated microfiber knot resonator (MKR) have been analyzed. The MKR is very sensitive to humidity changes since its refractive index is strongly humidity dependent. As a result, shifts occur in the resonance wavelength and there are also changes in output power. The un-coated MKR showed a sensitivity of 1.3 pm/%RH, in ter...

In this report, gold nanorods (GNRs) were used to enhance the sensitivity of the wavelength-modulated surface plasmon resonance (SPR) biosensor. The GNRs were designed and fabricated through seed-medicated growth and surface activation by a layer of a weak polyelectrolyte, poly(acrylic acid) for the attaching antibody. Rabbit anti-goat IgG was immobilized on GNRs, and sandwich assays were carri...

Resonator-based optical sensors detect the change of refractive index in the environment by measuring the resonance shift. The sensitivity of such sensors is determined by how precise one can locate the resonant wavelength, which is thought to be limited by the bandwidth and the quality factor of the resonator. Here we show that, with a tunable resonator, one can determine the resonant waveleng...