An Evanescent Light Wave Cannot Possess a Transverse Spin

Evanescent-Wave Gas Sensing Using an Integrated Thermal Light Source

The last years showed an increased request for miniaturised, CMOS-compatible gas detectors. In contrast to sensors utilizing metal-oxide chemical interfaces, optical strategies are potentially faster and more robust. Recently we demonstrated CO2 detection by evanescent-wave absorption in the mid-infrared using a combination of an external laser source and silicon waveguides based on CMOS techno...

Evanescent Light - Wave Atom Mirrors , Resonators , Waveguides , and Traps

Mask Enhancement Using an Evanescent Wave Effect

State of the art lithography is continually driven to resolve increasingly smaller features, forcing k1 values for lithography processes ever lower. In order to image these difficult features with reliable fidelity, lithographers must increasingly use Resolution Enhancement Techniques (RETs). One such technique that is proposed in this paper uses small, sub-wavelength grooves placed in close pr...

Evanescent Wave Illumination

When an electromagnetic wave (light) in a dielectric medium of index n1 is incident upon an interface of a different dielectric material of a lower optical density, n2 at an angle θ1 greater than the critical angle, θc = sin−1(n2/n1), total internal reflection (TIR) occurs. Although all of the incident energy is reflected, an electromagnetic field with exponentially decreasing intensity propaga...

Evanescent-wave dynamic light scattering at an oil-water interface: diffusion of interface-adsorbed colloids.

A light-scattering goniometer for evanescent-wave dynamic light scattering (EWDLS) measurements at a liquid-fluid interface is introduced, and used for measurements on two charge-stabilized polystyrene colloid systems adsorbed to alkane-water interfaces. The goniometer allows an independent variation of the penetration depth and the scattering vector components parallel and perpendicular to a l...