The physical properties of the layer structure being analyzed are included in the measured ellipsometric parameters (Ψ and Δ). This information exhibits the layer thickness and refractive index ...

Physicists at Harvard University in the US have built a silicon waveguide that exhibits a refractive index of, or close to, zero when operating at near-infrared telecom wavelengths. The waveguide can ...

Recent experiments that demonstrate the negative refraction of light could bring a heated scientific debate to a close, and give negative-index materials a positive future Figure 1: Negative-index ...

Thulium fiber lasers, operating at a wavelength of 2 micrometers, are valued for applications in medicine, materials ...