Recent research developments in the area of spacetime metamaterial structures and systems have raised new questions as to how physics fundamental phenomena is altered presence modulation. In this context, we present a generalized comparative description phenomenon total internal reflection (TIR) at different dynamic interfaces. Such interfaces include, beyond classical corresponding boundaries ...

Total internal reflection fluorescence microscopy (TIRFM) has been widely used to explore biological events that are close to the cell membrane by illuminating fluorescent molecules using the evanescent wave. However, TIRFM is typically limited to the examination of a low number of cells, and the results do not reveal potential heterogeneity in the cell population. In this report, we develop an...

A new class of rainbows is created when a droplet is illuminated from the inside by a point light source. The position of the rainbow depends on both the index of refraction of the droplet and the position of the light source, and the rainbow vanishes when the point source is too close to the center of the droplet. Here we experimentally measure the position of the transmission and one-internal...

Total internal reflection occurs for large angles of incidence, when light is incident from a high-refractive-index medium onto a low-index medium. We consider the situation where the low-index medium is active. By invoking causality in its most fundamental form, we argue that evanescent gain may or may not appear, depending on the analytic and global properties of the permittivity function. Fo...

A method is presented to reconstruct three-dimensional tomographic images of weakly scattering objects with subwavelength resolution. The method may be applied to data available in phase-sensitive, total-internal-reflection microscopy. The results follow from an analysis of the near-field inverse scattering problem with evanescent waves.

Capabilities of the attenuated total reflection (ATR) at THz wavelengths for increased sub-surface depth characterisation (bio-)materials are presented. The penetration a evanescent wave in biological samples is dependent on wavelength and temperature can reach 0.1–0.5 mm depth, due to strong refractive index change ∼0.4 ice-water transition; this quite significant important when studying sampl...

Microscopy, especially fluorescence microscopy, has proven to be a powerful method for studying biological processes. Unfortunately, some of the same features that make biological membranes powerful (for example, all of the action taking place across a narrow 4nm film) also make it difficult to visualize by fluorescence. Over the past 30 years, numerous tricks have been developed to narrow the ...