Fabrication of Multi-wavelength Optical Reflector using On
... because higher order diffraction are suppressed. When the grating period is lesser than the wavelength, the grating behaves as a uniform layer with effective refractive index among the material index and surrounding index. The applications of subwavelength grating are anti-reflecting filters [1], ph ...
... because higher order diffraction are suppressed. When the grating period is lesser than the wavelength, the grating behaves as a uniform layer with effective refractive index among the material index and surrounding index. The applications of subwavelength grating are anti-reflecting filters [1], ph ...
Oxidation of some Late Transition Metal Surfaces: Structural studies
... Simulations corresponding to typical standard x-ray diffraction (XRD), SXRD and LEED experiments are shown in Fig. 3.7b-d, with penetration depths in the order of 1 μm, 10 nm and 10 Å respectively. For the simulation of standard x-ray diffraction we find a ratio between the signals from the surface ...
... Simulations corresponding to typical standard x-ray diffraction (XRD), SXRD and LEED experiments are shown in Fig. 3.7b-d, with penetration depths in the order of 1 μm, 10 nm and 10 Å respectively. For the simulation of standard x-ray diffraction we find a ratio between the signals from the surface ...
Lab 4: Diffraction of Light
... Exercise 5: Slide each slit into the laser beam, and measure the width of the central intensity maximum. How does the single slit diffraction pattern change as the width of the slit increases? Calculate the average value of the wavelength of the laser using your Exercise 1: Sketch the pattern that y ...
... Exercise 5: Slide each slit into the laser beam, and measure the width of the central intensity maximum. How does the single slit diffraction pattern change as the width of the slit increases? Calculate the average value of the wavelength of the laser using your Exercise 1: Sketch the pattern that y ...
PDF only - at www.arxiv.org.
... the group velocity reduction below the speed of light in the case of certain Bessel beam pulses has been considered and an idea of its application for a natural optical buffer presented. However, the authors treat the problem as if only one type of Bessel pulse existed, no matter how it is gener ...
... the group velocity reduction below the speed of light in the case of certain Bessel beam pulses has been considered and an idea of its application for a natural optical buffer presented. However, the authors treat the problem as if only one type of Bessel pulse existed, no matter how it is gener ...
RESONANCE WAVELENGTH DEPENDENCE AND MODE
... and their physical properties approach those of dielectrics. Therefore, since metals at optical frequencies behave in a different fashion with respect to perfect conductors, the electromagnetic field is not perfectly reflected by the metal surface and, on the contrary, penetrates inside the metal at ...
... and their physical properties approach those of dielectrics. Therefore, since metals at optical frequencies behave in a different fashion with respect to perfect conductors, the electromagnetic field is not perfectly reflected by the metal surface and, on the contrary, penetrates inside the metal at ...
Superluminal and Slow Light Propagation in a Room
... spectrum in Fig. 4. For further details, see (40). 38. The criterion for two modes of light to be photon number squeezed is that for a sequence of photon number measurements, n1 and n2, the variance in (n1 – n2 ) must be less than the sum of the averages (n 1 ⫹ n 2 ) (32). For measurements on two ...
... spectrum in Fig. 4. For further details, see (40). 38. The criterion for two modes of light to be photon number squeezed is that for a sequence of photon number measurements, n1 and n2, the variance in (n1 – n2 ) must be less than the sum of the averages (n 1 ⫹ n 2 ) (32). For measurements on two ...
Calculation of the Reflection and Transmission of Finite
... Calculation of electromagnetic waves through layered anisotropic media has been a problem encountered in many cases, such as radome design, optical design and ferromagnetic materials. Existing research have discussed infinite plane waves through layered anisotropic media, such as the general transmi ...
... Calculation of electromagnetic waves through layered anisotropic media has been a problem encountered in many cases, such as radome design, optical design and ferromagnetic materials. Existing research have discussed infinite plane waves through layered anisotropic media, such as the general transmi ...
Lecture 2
... very important in terms of the resolution of the lens because it affects the coincident imaging of points along the optical axis and degrade the performance of the lens. http://www.youtube.com/watch?v=MKNFW0YwDYw-Canon lens production http://www.youtube.com/watch?v=E85FZ7WLvao http://micro.magnet.fs ...
... very important in terms of the resolution of the lens because it affects the coincident imaging of points along the optical axis and degrade the performance of the lens. http://www.youtube.com/watch?v=MKNFW0YwDYw-Canon lens production http://www.youtube.com/watch?v=E85FZ7WLvao http://micro.magnet.fs ...
Effect of varying electric potential on surface
... SPR angle. A prism was used to couple the laser beam to the surface plasmons that were excited on the gold film of a standard sensor chip 共CM5, Biacore AB兲. A photodiode array 共S3924-1024Q, Hamamatsu兲 captured the angular distribution of the reflected light. A data acquisition board 共AT-MIO16X, Nati ...
... SPR angle. A prism was used to couple the laser beam to the surface plasmons that were excited on the gold film of a standard sensor chip 共CM5, Biacore AB兲. A photodiode array 共S3924-1024Q, Hamamatsu兲 captured the angular distribution of the reflected light. A data acquisition board 共AT-MIO16X, Nati ...
Enhanced visualization of choroidal vessels using ultrahigh
... local minimum at ~1060 nm (µ a ~0.013 mm-1 at λ = 1060 nm, as compared to µ a ~0.002 mm-1 at λ = 800 nm) and a second one at ~ 1300 nm (µ a ~0.1 mm-1 at λ = 1300 nm), meaning that power losses due to water absorption will be 48% at 1060 nm and 99.3% at ~1300 nm as compared to 10% at ~800 nm for a do ...
... local minimum at ~1060 nm (µ a ~0.013 mm-1 at λ = 1060 nm, as compared to µ a ~0.002 mm-1 at λ = 800 nm) and a second one at ~ 1300 nm (µ a ~0.1 mm-1 at λ = 1300 nm), meaning that power losses due to water absorption will be 48% at 1060 nm and 99.3% at ~1300 nm as compared to 10% at ~800 nm for a do ...
Second-harmonic generation for a dilute suspension of coated particles C. Xu,
... materials consisting of two or more materials with different physical properties have been studied intensively, with the aim of tuning the effective physical properties of the composite by properly choosing the constituent materials, the structure of the composite, and/or the volume fraction of each ...
... materials consisting of two or more materials with different physical properties have been studied intensively, with the aim of tuning the effective physical properties of the composite by properly choosing the constituent materials, the structure of the composite, and/or the volume fraction of each ...
Full-Text PDF
... which can be applied in more tech areas. For instance, it can make GaAs1−xBix a promising new semiconductor saturable absorber that has a very high possibility to be used in all-solid-state Q-switched and mode-locked lasers. In this paper, GaAs1−xBix crystal with different concentrations of Bi atoms ...
... which can be applied in more tech areas. For instance, it can make GaAs1−xBix a promising new semiconductor saturable absorber that has a very high possibility to be used in all-solid-state Q-switched and mode-locked lasers. In this paper, GaAs1−xBix crystal with different concentrations of Bi atoms ...
Sheets Mar 2014 - Arab Academy for Science, Technology
... 8] A typical relative refractive index difference for an optical fiber designed for long transmission is 1%. Estimate the NA and the solid acceptance angle in air for the fiber when the core index is 1.46. Further, calculate the critical angle at the core-cladding interface within the fiber. It may ...
... 8] A typical relative refractive index difference for an optical fiber designed for long transmission is 1%. Estimate the NA and the solid acceptance angle in air for the fiber when the core index is 1.46. Further, calculate the critical angle at the core-cladding interface within the fiber. It may ...
Nondegenerate optical Kerr effect in semiconductors
... We use the 2-color Z-scan [7], [16] to measure the nondegenerate n 2 in ZnSe and ZnS. A Q-switched and modelocked Nd:YAG laser is used to generate single tp::::: 83 ps (FWHM) pulses at >. = 1.06 J.Lm as the excitation beam. Simultaneously, the second-harmonic of the same laser at >. = 532 nm serves ...
... We use the 2-color Z-scan [7], [16] to measure the nondegenerate n 2 in ZnSe and ZnS. A Q-switched and modelocked Nd:YAG laser is used to generate single tp::::: 83 ps (FWHM) pulses at >. = 1.06 J.Lm as the excitation beam. Simultaneously, the second-harmonic of the same laser at >. = 532 nm serves ...
Design of Refractive Index Profile for Multimode Optical Fibers with
... where nk is refractive index of k layer (k=0…N); nmax is the maximal core refractive index. Profile optimization leads to minimization of the objective function with great number of arguments, and simplex search method of Nelder and Mead can be applied, that can be submitted by [13,4] devoted to pro ...
... where nk is refractive index of k layer (k=0…N); nmax is the maximal core refractive index. Profile optimization leads to minimization of the objective function with great number of arguments, and simplex search method of Nelder and Mead can be applied, that can be submitted by [13,4] devoted to pro ...
Apodized Chirped Fiber Bragg Gratings for Wavelength Shift Compensation under... Level
... design. They can effectively be used for dispersion compensation in high-bit-rate, long-haul fiber communication links. The main peak in the reflection spectrum of a finite length Bragg gratings with uniform modulation of the index of refraction is accompanied by a series of side lobes at adjacent w ...
... design. They can effectively be used for dispersion compensation in high-bit-rate, long-haul fiber communication links. The main peak in the reflection spectrum of a finite length Bragg gratings with uniform modulation of the index of refraction is accompanied by a series of side lobes at adjacent w ...
Fiberoptic Communication Systems
... individual wavelengths that constitute the spectrum of the source, the output pulse will certainly be broadened. The pulse broadening in single mode fibers will be much smaller than the corresponding value in multimode fibers. There are two components to the dispersion in single mode fibers. One is ...
... individual wavelengths that constitute the spectrum of the source, the output pulse will certainly be broadened. The pulse broadening in single mode fibers will be much smaller than the corresponding value in multimode fibers. There are two components to the dispersion in single mode fibers. One is ...
Large acceptance of non-collinear phase
... precisely control the direction of interactive waves and temperature of the crystal to satisfy phase- matching condition, quasi-phase-matching (QPM) [2–4] which involves a periodic modulation of second-order nonlinearity coefficient to supply the reciprocal vector Gm = 2π m/Λ (Λ, m) to compensate fo ...
... precisely control the direction of interactive waves and temperature of the crystal to satisfy phase- matching condition, quasi-phase-matching (QPM) [2–4] which involves a periodic modulation of second-order nonlinearity coefficient to supply the reciprocal vector Gm = 2π m/Λ (Λ, m) to compensate fo ...
Optical properties of small-bore hollow glass waveguides
... When the waveguides are used in medical or industrial applications, it is often desirable to maintain the spatial purity of the input laser beam because it is necessary to cut or ablate with as small a spot size as possible. To evaluate the mode purity of the output beam, we measured the output beam ...
... When the waveguides are used in medical or industrial applications, it is often desirable to maintain the spatial purity of the input laser beam because it is necessary to cut or ablate with as small a spot size as possible. To evaluate the mode purity of the output beam, we measured the output beam ...
Structure and optical properties of nanocrystalline hafnium oxide
... Optical properties were evaluated using both spectrophotometric and ellipsometry measurements. Spectrophotometry measurements were attained by using a Cary 5000 UV–vis–NR ...
... Optical properties were evaluated using both spectrophotometric and ellipsometry measurements. Spectrophotometry measurements were attained by using a Cary 5000 UV–vis–NR ...
Anti-reflective coating
An antireflective or anti-reflection (AR) coating is a type of optical coating applied to the surface of lenses and other optical elements to reduce reflection. In typical imaging systems, this improves the efficiency since less light is lost. In complex systems such as a telescope, the reduction in reflections also improves the contrast of the image by elimination of stray light. This is especially important in planetary astronomy. In other applications, the primary benefit is the elimination of the reflection itself, such as a coating on eyeglass lenses that makes the eyes of the wearer more visible to others, or a coating to reduce the glint from a covert viewer's binoculars or telescopic sight.Many coatings consist of transparent thin film structures with alternating layers of contrasting refractive index. Layer thicknesses are chosen to produce destructive interference in the beams reflected from the interfaces, and constructive interference in the corresponding transmitted beams. This makes the structure's performance change with wavelength and incident angle, so that color effects often appear at oblique angles. A wavelength range must be specified when designing or ordering such coatings, but good performance can often be achieved for a relatively wide range of frequencies: usually a choice of IR, visible, or UV is offered.