Fluctuations of the refractive index associated with atmospheric turbulence affect the propagation of electromagnetic and acoustic waves in the atmosphere. In the reported study, the effects of turbulence on wave propagation in the atmospheric convective boundary layer (CBL) are considered in terms of the second-order refractive index structure function and related to its structure-function par...

A new measurement system has been developed that simply determines the refractive-index profile of any optical fiber by analyzing the propagation of cladding modes. Measurement accuracy was verified by a comparison with the refractive near-field method, and a sufficient resolution level was achieved to produce the fine structural details in single-mode fibers.

In this Letter, we show theoretically that the nonlinear photoionisation process of a noble gas inside hollow-core photonic crystal fibre can be exploited in obtaining broadband supercontinuum generation via pumping close to mid-infrared regime. The interplay between Kerr and nonlinearities is strongly enhanced Photoionisation continuously modifies medium dispersion, which refractive index star...

Metal-based negative refractive-index materials have been extensively studied in the microwave region. However, negative-index metamaterials have not been realized at near-IR or visible frequencies due to difficulties of fabrication and to the generally poor optical properties of metals at these wavelengths. In this Letter, we report the first fabrication and experimental verification of a tran...

This work reports the optical properties of surface plasmon resonance (SPR) based on metal-insulator-metal (MIM) structure towards a refractive index sensor. The MIM-SPR operating near infrared region consists lateral periodicity subwavelength gold patterns placed stack thin silica spacer and silver film (acting as reflector) silicon substrate. reflection spectra electric field distributions st...