We introduce a new symmetry, light-cone reflection (LCR), which interchanges timelike and spacelike intervals. Our motivation is to provide reason, based on why tachyons might exist, with emphasis application neutrinos. show that LCR, combined translations, leads much larger symmetry. construct an LCR-invariant Lagrangian discuss some of its properties. In simple example, we find complete symme...

The orientation of chemical bonds in thin films is commonly probed with polarized internal reflection Fourier transform infrared spectroscopy. Here we demonstrate how the internal reflection spectra obtained using s-polarized light are related with the corresponding p-polarized spectra. The relation between s- and p-polarized internal reflection spectra is applied to resolve the absorption band...

This paper presents an error analysis and correction model for four structured light methods applied to three common types of biological tissue; skin, fat and muscle. Despite its many advantages, structured light is based on the assumption of direct reflection at the object surface only. This assumption is violated by most biological material e.g. human skin, which exhibits subsurface light ref...

In this paper a novel anti-reflection (AR) coating based on silicon nano-bars is designed and its impact on the performance of crystalline silicon (c-Si) thin-film solar cells is extensively studied. Silicon nano-bars with optimized size and period are embedded on top of the active layer, under a 100nm Si3N4 layer. As a result of the proposed layer stack, an inhomogeneous intermediate layer wit...

In this research, in order to coating PETN particles, nano-pigment of redlitholrubine B 57:1 (NLR) was used in a surfactant environment of cetyltrimethylammonium bromide (CTAB) using solvent/none-solvent (water-acetone) method. Afterstructural studies of PETN-NLR nanocomposite by infrared (FT-IR) and field emissionscanning electron microscopy-Energy dispersive X-ray (FES...

The results of study of the optical reflection and contactless electroreflection from a periodic system of multiple GaAs/AlGaAs quantum wells will be presented. The quantum well width was 15 or 20 nm and the barriers were 104 nm thick. In this system, the electromagnetic resonance of the Bragg reflection occurs at the frequency that coincides or is close to the frequency of the exciton-polarito...

We studied optical reflection (OR) and contactless electroreflection (CER) from a periodic system of multiple GaAs/AlGaAs quantum wells (QWs). The system was designed in such way that the electromagnetic resonance of Bragg reflection occurs at the frequency that coincides or is close to the frequency of the exciton-polariton resonance in the wells. Under these conditions there should be electro...

Introduction: The human skin is an active medium from the optical point of view. Therefore, the diagnostic and therapeutic techniques employing light are increasing. Current optical techniques are based on the measurement of the intensity of reflected absorbed or backscattered light from or within skin. Studies have shown that biological tissues, and in particular skin, demonstrate polarization...