X-ray Optics - Studentportalen
... A schematic multilayer structure and a typical measured reflectivity spectrum. Layer A usually consists of a strongly absorbing material (metal). Layer B is a spacer made of a low-density material. ...
... A schematic multilayer structure and a typical measured reflectivity spectrum. Layer A usually consists of a strongly absorbing material (metal). Layer B is a spacer made of a low-density material. ...
Simultaneous Negative Phase and Group Velocity of Light in a
... identical result, because the complex transmittance and reflectance coefficients are strictly identical, owing to the principle of the retrieval procedure (18). We start our discussion of the data in Fig. 4C by assuming that the phase delay is exclusively due to propagation. In this case, a negative ...
... identical result, because the complex transmittance and reflectance coefficients are strictly identical, owing to the principle of the retrieval procedure (18). We start our discussion of the data in Fig. 4C by assuming that the phase delay is exclusively due to propagation. In this case, a negative ...
Measurements at the Speed of Ultrasound
... occur only when a defect or other discontinuity is encountered. The angle-beam wedge is used routinely nowadays to inspect welds and to find cracks or disbonds. Depending on the wedge angle, one can launch shear or Rayleigh (surface) or Lamb (plate) waves in the metal object. The refracted angle for ...
... occur only when a defect or other discontinuity is encountered. The angle-beam wedge is used routinely nowadays to inspect welds and to find cracks or disbonds. Depending on the wedge angle, one can launch shear or Rayleigh (surface) or Lamb (plate) waves in the metal object. The refracted angle for ...
A Carpet Cloak Device for Visible Light
... a small additional loss due to the reflection at each of the triangle sides. However all such losses are extrinsic to the transformation device. Two control samples were also fabricated beside the cloak sample, a bump structure without any transformation pattern and a simple mirror without a bump. T ...
... a small additional loss due to the reflection at each of the triangle sides. However all such losses are extrinsic to the transformation device. Two control samples were also fabricated beside the cloak sample, a bump structure without any transformation pattern and a simple mirror without a bump. T ...
Diffraction Basics
... or through narrow slits or in being reflected from ruled surfaces and in which the rays appear to be deflected and to produce fringes of parallel light and dark or colored bands; also : a similar modification of other waves (as sound waves) ...
... or through narrow slits or in being reflected from ruled surfaces and in which the rays appear to be deflected and to produce fringes of parallel light and dark or colored bands; also : a similar modification of other waves (as sound waves) ...
Optical mode structure of the air waveguide
... The amplitude and radial scale (or wavelength) of the outgoing density perturbation is imposed by the strength and diameter a of the initiating filament energy deposition. Figures 1(f) and 1(g) show calculated bound modes at λ 532 nm for p; m 0; 0 and (0,5), confirming that the mode conforms ...
... The amplitude and radial scale (or wavelength) of the outgoing density perturbation is imposed by the strength and diameter a of the initiating filament energy deposition. Figures 1(f) and 1(g) show calculated bound modes at λ 532 nm for p; m 0; 0 and (0,5), confirming that the mode conforms ...
Subwavelength dynamic focusing in plasmonic nanostructures using time reversal * Guy Bartal,
... spatial frequencies, propagating back with a propagation constant of the same magnitude 共and opposite sign兲. The time-reversed beam intensity at the MDML output is plotted in 关Fig. 3共d兲兴. The intensity full width at half maximum 共FWHM兲 is limited by the width of the dielectric waveguide, to 30 nm. N ...
... spatial frequencies, propagating back with a propagation constant of the same magnitude 共and opposite sign兲. The time-reversed beam intensity at the MDML output is plotted in 关Fig. 3共d兲兴. The intensity full width at half maximum 共FWHM兲 is limited by the width of the dielectric waveguide, to 30 nm. N ...
Anisotropic Weak Localization of Light
... effect in coherent backscattering [19]. None of these effects play a role in our samples since the anisotropy is an intrinsic optical property of the nematic phase. Scattering in nematics is dominated by fluctuations of the otherwise aligned director and the magnetic field is used to obtain a monodo ...
... effect in coherent backscattering [19]. None of these effects play a role in our samples since the anisotropy is an intrinsic optical property of the nematic phase. Scattering in nematics is dominated by fluctuations of the otherwise aligned director and the magnetic field is used to obtain a monodo ...
Yamanashi Prefecture
... Bellows are used to absorb position changes between vacuum devices connected and vibrations and displacements generated during operation when a vacuum environment is developed as something indispensable for research in semiconductor manufacturing, medical equipment, biotech technology, and other hig ...
... Bellows are used to absorb position changes between vacuum devices connected and vibrations and displacements generated during operation when a vacuum environment is developed as something indispensable for research in semiconductor manufacturing, medical equipment, biotech technology, and other hig ...
wavelength dependence of the light-induced index
... have 100% modulation. In the wavelength region of interest, it is necessary to determine only the local modulation depth that corresponds to a optical phase change of 7r. Once the optical phase change is determined, the change in refractive index of the fiber core is calculated as follows. The chang ...
... have 100% modulation. In the wavelength region of interest, it is necessary to determine only the local modulation depth that corresponds to a optical phase change of 7r. Once the optical phase change is determined, the change in refractive index of the fiber core is calculated as follows. The chang ...
Physical Optics - Old Mill High School
... In general, destructive interference occurs for a single slit of width a when sin θdark = mλ/a ...
... In general, destructive interference occurs for a single slit of width a when sin θdark = mλ/a ...
EXTERNAL MODULATION
... split equally into two paths at this point. So the light on each of these paths for an ideal device will be 3 dB less in optical power compared to the input light. ...
... split equally into two paths at this point. So the light on each of these paths for an ideal device will be 3 dB less in optical power compared to the input light. ...
Introduction to Drawing Ray Diagrams Types of
... Lens – a transparent device with at least 1 curved surface that changes the direction of light passing through it (refracts light) *Rays are refracted at the surfaces of lenses according to Snell’s Law* Converging Lens – a lens that causes parallel light rays to come together, so that they cross ...
... Lens – a transparent device with at least 1 curved surface that changes the direction of light passing through it (refracts light) *Rays are refracted at the surfaces of lenses according to Snell’s Law* Converging Lens – a lens that causes parallel light rays to come together, so that they cross ...
Birefringence
Birefringence is the optical property of a material having a refractive index that depends on the polarization and propagation direction of light. These optically anisotropic materials are said to be birefringent (or birefractive). The birefringence is often quantified as the maximum difference between refractive indices exhibited by the material. Crystals with asymmetric crystal structures are often birefringent, as are plastics under mechanical stress.Birefringence is responsible for the phenomenon of double refraction whereby a ray of light, when incident upon a birefringent material, is split by polarization into two rays taking slightly different paths. This effect was first described by the Danish scientist Rasmus Bartholin in 1669, who observed it in calcite, a crystal having one of the strongest birefringences. However it was not until the 19th century that Augustin-Jean Fresnel described the phenomenon in terms of polarization, understanding light as a wave with field components in transverse polarizations (perpendicular to the direction of the wave vector).