Showing papers on "Total external reflection published in 2022"
TL;DR: In this article , the p-polarization component of radiation pressure force from an unpolarized blackbody light source is predicted by the use of a Maxwell equation solver for a right triangular prism grating of period 2 μm and refractive index 3.5.
Abstract: The p-polarization component of radiation pressure force from an unpolarized blackbody light source is predicted by the use of a Maxwell equation solver for a right triangular prism grating of period 2 μm and refractive index 3.5. The transmitted and reflected angular scattering distributions are found to qualitatively agree with diffraction theory: At relatively short wavelengths the transmitted light is concentrated near the refraction angle, and reflected light is concentrated near the reflection angle. Owing to diffraction and multiple internal reflections, however, the spectral irradiance of transmitted and reflected light was found to significantly vary with wavelength. We found that the high value of the refractive index produced a large fraction of reflected light, thereby reducing the net transverse component of radiation pressure force. These results suggest that low index transmission gratings, anti-reflection coatings, optimized metasurface films, or reflection gratings should be explored for future solar sailing missions.
3 citations
01 Jan 2022
TL;DR: In this article , the difference between scattered and reflected light, how mirrors form virtual images, and that mirrors do not invert left and right, and the index of refraction and Snell's law, which tells how much light rays are kinked at the interface of two materials.
Abstract: In this chapter you will learn the difference between scattered and reflected light, how mirrors form virtual images, and that mirrors do not invert left and right. Then you will learn the index of refraction and Snell's law, which tells you precisely how much light rays are kinked at the interface of two materials. With the notable exception of oil and ethanol, denser materials generally have higher indices of refraction, so light rays are kinked toward or away from the normal when they travel from a less dense into a denser material or vice versa. Starting from the denser material, if the angle of incidence is greater than the critical angle, then light will not be refracted but totally internally reflected. Refraction and reflection explain how primary and secondary rainbows are formed, and why the band of sky between them is darker. Total internal reflection makes hair or sand darker when wet. A combination of refraction and total internal reflection is why diamonds for jewelry are cut with specific, precise shapes that maximize their sparkle.
1 citations
TL;DR: In this article , an analysis of the ellipsometric parameters of the reflected light from the prism test material air system is carried out when circularly polarized light is incident on it under the conditions of the onset of the phenomenon of total internal reflection.
Abstract: An analysis of the ellipsometric parameters of the reflected light from the prism test material air system is carried out when circularly polarized light is incident on it under the conditions of the onset of the phenomenon of total internal reflection. At the onset of total internal reflection, the ellipsometry parameter shows high variability with the angle of incidence, in contrast to the parameter r0. It is shown that TIR occurs when the angle of incidence is not equal to the critical angle of the adjacent media for two different materials, these angles differ from each other. In the case of a film, the TIR phenomenon occurs at an angle equal to the critical angle at the prism-air interface and does not depend on the film material. The results obtained show the high efficiency of using the ellipsometric method together with circularly polarized incident radiation for diagnostics of thin films made of biological material.