Far-Field Optical Superlens
... It can be clearly seen that the FSL projects distinctive fringe images for each object (Figure 3a). The periodicity of the fringe images in the far field increases for objects with characteristic sizes that approach the period of the FSL grating (Λ ) 150 nm). This effect is similar to Moiré fringes ...
... It can be clearly seen that the FSL projects distinctive fringe images for each object (Figure 3a). The periodicity of the fringe images in the far field increases for objects with characteristic sizes that approach the period of the FSL grating (Λ ) 150 nm). This effect is similar to Moiré fringes ...
GEOMETRIC OPTICS
... The visual system perceives different wavelengths of light as different colors . long wavelengths appear red , intermediate wavelengths appear yellow or green , and short wavelengths appear blue . In a vacuum , all wavelengths travel at the same speed . In any other medium , short wavelengths usuall ...
... The visual system perceives different wavelengths of light as different colors . long wavelengths appear red , intermediate wavelengths appear yellow or green , and short wavelengths appear blue . In a vacuum , all wavelengths travel at the same speed . In any other medium , short wavelengths usuall ...
Plasmonic metamaterials Review Kan Yao and Yongmin Liu*
... refracts at the interface between two media. As illustrated in Figure 3A, if light is incident from a positive-index material to a negative-index one, the refracted light lies on the same side as the incident light with respect to the surface normal. This is because the tangential components of the ...
... refracts at the interface between two media. As illustrated in Figure 3A, if light is incident from a positive-index material to a negative-index one, the refracted light lies on the same side as the incident light with respect to the surface normal. This is because the tangential components of the ...
Instruments and Methods of Astrophysical X-ray
... • Photons coming from the SODART telescope are diffracted by a thin mosaic graphite crystal at 2.6 keV and 5.2 keV creating a secondary focus. The photons at E > 5 keV that do not satisfy the Bragg condition pass through and are diffused around by a lithium scatterer. 4 position sensitive proportion ...
... • Photons coming from the SODART telescope are diffracted by a thin mosaic graphite crystal at 2.6 keV and 5.2 keV creating a secondary focus. The photons at E > 5 keV that do not satisfy the Bragg condition pass through and are diffused around by a lithium scatterer. 4 position sensitive proportion ...
sensors Chemical Sensing Using Fiber Cavity Ring-Down Spectroscopy
... An alternative approach to mirror-based CRD detection for condensed phase absorption and refractive index measurements was developed by our group and others since 2002. In fiber-cavity ring-down spectroscopy the optical cavity consists of a strand of single-mode or multi-mode fiber optic cable. The ...
... An alternative approach to mirror-based CRD detection for condensed phase absorption and refractive index measurements was developed by our group and others since 2002. In fiber-cavity ring-down spectroscopy the optical cavity consists of a strand of single-mode or multi-mode fiber optic cable. The ...
Optical Components and Devices for Next-Generation
... resulting in a drive voltage of 5 V with singleelectrode driving.9),10) We decided to improve the characteristics of the 40 Gb/s modulator by optimizing its electrode design. We investigated the gap dependency of microwave loss in relation to the electric bandwidth, half-wave voltage Vπ, and interac ...
... resulting in a drive voltage of 5 V with singleelectrode driving.9),10) We decided to improve the characteristics of the 40 Gb/s modulator by optimizing its electrode design. We investigated the gap dependency of microwave loss in relation to the electric bandwidth, half-wave voltage Vπ, and interac ...
Computation of the off-axis effective area of the New Hard X
... In this section we present the application of the formulae reported in Sect. 2 to the computation of the effective area of the NHXM hard X-ray telescope[2]. The NHXM optical system, as resulting from a detail optimization[11], comprises 4 identical modules with 70 mirror shells of 391 to 155 mm diam ...
... In this section we present the application of the formulae reported in Sect. 2 to the computation of the effective area of the NHXM hard X-ray telescope[2]. The NHXM optical system, as resulting from a detail optimization[11], comprises 4 identical modules with 70 mirror shells of 391 to 155 mm diam ...
Section 4 Diffraction_handbook of optics
... where dS is the area element at Q. The subscript S on the integrals denotes the region of integration on the wave surface. The integrand describes the contribution of the secondary wavelets. Fresnel-zone construction provides a convenient means of expressing the area integral as a sum over the contr ...
... where dS is the area element at Q. The subscript S on the integrals denotes the region of integration on the wave surface. The integrand describes the contribution of the secondary wavelets. Fresnel-zone construction provides a convenient means of expressing the area integral as a sum over the contr ...
Full-Text PDF
... and is no longer linked to the typical distance between adjacent cells. Many efforts have been made to diminish the size of those resonant inclusions in order to build media that are now described with effective parameters. Indeed, because the spacing between resonators is small compared to the wave ...
... and is no longer linked to the typical distance between adjacent cells. Many efforts have been made to diminish the size of those resonant inclusions in order to build media that are now described with effective parameters. Indeed, because the spacing between resonators is small compared to the wave ...
optical resonances in multilayer structures
... where P = ǫ0 χe E and M = µ0 χm H are the polarization and magnetization vectors related to the electric and magnetic fields by the dimensionless electric and magnetic susceptibilities χe and χm . The constants of proportionality are called relative electric permittivity ǫr = 1 + χe and relative mag ...
... where P = ǫ0 χe E and M = µ0 χm H are the polarization and magnetization vectors related to the electric and magnetic fields by the dimensionless electric and magnetic susceptibilities χe and χm . The constants of proportionality are called relative electric permittivity ǫr = 1 + χe and relative mag ...
Multimode or Single-Mode Optical Fiber
... Finally, the fact that multimode optical fiber is easier to install and terminate in the field is an important consideration for enterprise environments, with their frequent moves, adds and changes. Multimode and Single-Mode – What’s the Difference? The way in which these two fiber types transmit li ...
... Finally, the fact that multimode optical fiber is easier to install and terminate in the field is an important consideration for enterprise environments, with their frequent moves, adds and changes. Multimode and Single-Mode – What’s the Difference? The way in which these two fiber types transmit li ...
Scattering of a Plane Electromagnetic Wave by a Small Conducting
... ln(2r/b) and ϕ ≈ φ. The semimajor axis a of an ellipse of constant μa has value ...
... ln(2r/b) and ϕ ≈ φ. The semimajor axis a of an ellipse of constant μa has value ...
Optical switches
... Optical fiber characteristics • Dispersion is an undesirable phenomenon in optical fibers • causes an initially narrow light pulse to spread out as it propagates along the fiber • There are different causes for dispersion • modal dispersion • chromatic dispersion • Modal dispersion • occurs in multi ...
... Optical fiber characteristics • Dispersion is an undesirable phenomenon in optical fibers • causes an initially narrow light pulse to spread out as it propagates along the fiber • There are different causes for dispersion • modal dispersion • chromatic dispersion • Modal dispersion • occurs in multi ...
Faraday isolation
... the Faraday has been tuned in air with low power (0.5 W) whereas now about 7W (in vacuum) are going through it test in tower have been performed with less than 50 mW: the Faraday should be tuned again with effective 7 W (but it is impossible to tune in vacuum) ...
... the Faraday has been tuned in air with low power (0.5 W) whereas now about 7W (in vacuum) are going through it test in tower have been performed with less than 50 mW: the Faraday should be tuned again with effective 7 W (but it is impossible to tune in vacuum) ...
Phys. Rev. Lett. 87, 160405
... variable f [11]. In our setup this time phase is measured interferometrically and controlled with a piezomounted mirror and a servoloop. Furthermore, the intensity of the lattice beams is stabilized in order to ensure a constant potential depth during our measurements. The intensity pattern in the y ...
... variable f [11]. In our setup this time phase is measured interferometrically and controlled with a piezomounted mirror and a servoloop. Furthermore, the intensity of the lattice beams is stabilized in order to ensure a constant potential depth during our measurements. The intensity pattern in the y ...
Vector mixed-gap surface solitons
... localized vectorial modes that have no analogs in uniform media [10-12]. Similarly, mixedgap vector solitons whose components emerge from different gaps of the Floquet-Bloch spectrum of the periodic structure have been introduced recently [13,14]. Optical lattices support a variety of other stable v ...
... localized vectorial modes that have no analogs in uniform media [10-12]. Similarly, mixedgap vector solitons whose components emerge from different gaps of the Floquet-Bloch spectrum of the periodic structure have been introduced recently [13,14]. Optical lattices support a variety of other stable v ...
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).