Pulse splitting by modulating the thickness of buffer layer of two
... and amplitude modulation for benefits in diffraction efficiency and beam shaping. Stratified holographic optical elements (SHOEs), referred to a structure composed of a stack of thin or thick grating layers interleaved with optically homogeneous buffer layers, are characterized by specific propertie ...
... and amplitude modulation for benefits in diffraction efficiency and beam shaping. Stratified holographic optical elements (SHOEs), referred to a structure composed of a stack of thin or thick grating layers interleaved with optically homogeneous buffer layers, are characterized by specific propertie ...
Light scattering by multiple red blood cells
... the inverse-scattering problem of determining the internal structure of an object. In this paper it is applied in its simplest form to the scattering of a plane wave from objects in a homogeneous lossless medium. The method can be explained as follows: Consider an object that occupies the volume V. ...
... the inverse-scattering problem of determining the internal structure of an object. In this paper it is applied in its simplest form to the scattering of a plane wave from objects in a homogeneous lossless medium. The method can be explained as follows: Consider an object that occupies the volume V. ...
Far-field optical microscope with nanometer-scale
... principle has been reported 6, and experimental proofs of its resolution of at least 50 nm, which is equal to approximately λ/10 and far supersedes resolution of any other known far-field optical microscope have been presented. We believe that this new microscopy technique will lead to numerous brea ...
... principle has been reported 6, and experimental proofs of its resolution of at least 50 nm, which is equal to approximately λ/10 and far supersedes resolution of any other known far-field optical microscope have been presented. We believe that this new microscopy technique will lead to numerous brea ...
Femtosecond self-guided atmospheric light strings
... severe thunderstorms18 and several experimental groups are working worldwide on this important problem. In addition, the ability to generate a white-light continuum at a preselected location in the upper atmosphere has huge potential in remote sensing and ladar applications. In fact, an experiment b ...
... severe thunderstorms18 and several experimental groups are working worldwide on this important problem. In addition, the ability to generate a white-light continuum at a preselected location in the upper atmosphere has huge potential in remote sensing and ladar applications. In fact, an experiment b ...
The generation of nondiffracting beams using
... In this way we can plot only the phase of the interferogram, discarding information about the amplitude, and hence obtain an approximate description of the interferogram, which is accurate regarding its phase but not its amplitude. More complex and ingenious schemes to preserve and encode both the a ...
... In this way we can plot only the phase of the interferogram, discarding information about the amplitude, and hence obtain an approximate description of the interferogram, which is accurate regarding its phase but not its amplitude. More complex and ingenious schemes to preserve and encode both the a ...
Spherical aberration in spatial and temporal transforming lenses of
... Later, Kempe et al4 investigated the transmission of ultrashort light pulses by singlet lens and achromatic lens doublet taking into account diffraction effects. In terms of Fourier optics, he derived the basic equation for the transformation taking into account the dispersion in first and second or ...
... Later, Kempe et al4 investigated the transmission of ultrashort light pulses by singlet lens and achromatic lens doublet taking into account diffraction effects. In terms of Fourier optics, he derived the basic equation for the transformation taking into account the dispersion in first and second or ...
Ce e cu galben reprezinta corecturi de limba/topica/inteles/gramatica
... optical power, the polarizations component vector evolution in ideal conditions, without induced birefringence phenomenon. The second step of simulations was to determine the optical power loss by creating the birefringence phenomenon when inducing the ellipticity of the core. The wavelengths choose ...
... optical power, the polarizations component vector evolution in ideal conditions, without induced birefringence phenomenon. The second step of simulations was to determine the optical power loss by creating the birefringence phenomenon when inducing the ellipticity of the core. The wavelengths choose ...
slac memorandum - Stanford Synchrotron Radiation Lightsource
... shielding. Five of these originate on the SLM beamline and end at the ratchet wall; one originates on the SLM line and passes through the Beamline 1 penetration; one originates on the SLM line and enters the SLM light-pipe; and one originates on either Beamline 1 or the SPEAR beam path and enters th ...
... shielding. Five of these originate on the SLM beamline and end at the ratchet wall; one originates on the SLM line and passes through the Beamline 1 penetration; one originates on the SLM line and enters the SLM light-pipe; and one originates on either Beamline 1 or the SPEAR beam path and enters th ...
3 Introduction to Add
... bypassing faulty connections, allowing minimal service disruption and the ability to adapt or upgrade the optical network to different WDM technologies. Configurations presented in the literature to perform the required add or drop functions use both planar and fibre technology. Planar devices [28-3 ...
... bypassing faulty connections, allowing minimal service disruption and the ability to adapt or upgrade the optical network to different WDM technologies. Configurations presented in the literature to perform the required add or drop functions use both planar and fibre technology. Planar devices [28-3 ...
Two-color cross-correlation in small-angle static light
... The samples are microporous membrane filters ~Sartorius!, which have been characterized in a previous work @19#, and whose features fit very well the experimental requirements. First of all, the membranes are quite thin, their thickness being 14065 mm. Moreover, while in air they look perfectly opaq ...
... The samples are microporous membrane filters ~Sartorius!, which have been characterized in a previous work @19#, and whose features fit very well the experimental requirements. First of all, the membranes are quite thin, their thickness being 14065 mm. Moreover, while in air they look perfectly opaq ...
Optical Fibres in Communications
... 2. Introduction:Optical fibers are arguably one of the world’s most influential scientific developments from the latter half of the 20th century. Normally we are unaware that we are using them, although many of us do frequently. The majority of telephone calls and internet traffic at some stage in ...
... 2. Introduction:Optical fibers are arguably one of the world’s most influential scientific developments from the latter half of the 20th century. Normally we are unaware that we are using them, although many of us do frequently. The majority of telephone calls and internet traffic at some stage in ...
Real and Imaginary Properties of Epsilon-Near
... fields, which brings about the high loss function. This can be useful to make efficient “perfect” thin absorbers [28,29]. Noteworthy, there is also a degeneracy in the mathematical sense for ε ¼ 0 because the coefficient at one of the highest derivatives in the wave-propagation equation (obtained fr ...
... fields, which brings about the high loss function. This can be useful to make efficient “perfect” thin absorbers [28,29]. Noteworthy, there is also a degeneracy in the mathematical sense for ε ¼ 0 because the coefficient at one of the highest derivatives in the wave-propagation equation (obtained fr ...
Miscellaeous features - JLab Tech Notes Home Page
... The gain is optimized if the optical mode is wrapped tightly around the electron beam. The optical power output is optimized when the maximum number of electrons is enclosed in the optical mode. Typically, a compromise is made between these two effects. The beam size and divergence around an optical ...
... The gain is optimized if the optical mode is wrapped tightly around the electron beam. The optical power output is optimized when the maximum number of electrons is enclosed in the optical mode. Typically, a compromise is made between these two effects. The beam size and divergence around an optical ...
Stabler, Graham (2005) High resolution wide field surface plasmon
... contrast in microscopy unless the material is highly absorbing where reflection and transmission methods may be used as they are in bulk sensing/microscopy. A simple example of a glass tumbler held underwater demonstrates the inherent difficulty in imaging structures with very similar refractive ind ...
... contrast in microscopy unless the material is highly absorbing where reflection and transmission methods may be used as they are in bulk sensing/microscopy. A simple example of a glass tumbler held underwater demonstrates the inherent difficulty in imaging structures with very similar refractive ind ...
Microscopes - OpenStax CNX
... Both the objective and the eyepiece contribute to the overall magni cation, which is large and negative, consistent with Figure 2, where the image is seen to be large and inverted. In this case, the image is virtual and inverted, which cannot happen for a single element (case 2 and case 3 images for ...
... Both the objective and the eyepiece contribute to the overall magni cation, which is large and negative, consistent with Figure 2, where the image is seen to be large and inverted. In this case, the image is virtual and inverted, which cannot happen for a single element (case 2 and case 3 images for ...
Design and analysis of a low-threshold polymer circular-grating distributed-feedback laser
... flexibility and low-cost fabrication. High photoluminescence yields and wide emission spectra have been observed in certain polymers for some time, and efforts to design working lasers with polymers and other organic materials continue. Although considerable success has been achieved with optically ...
... flexibility and low-cost fabrication. High photoluminescence yields and wide emission spectra have been observed in certain polymers for some time, and efforts to design working lasers with polymers and other organic materials continue. Although considerable success has been achieved with optically ...
Subwavelength imaging in photonic crystals * Chiyan Luo,
... that in Eq. 共3兲. We note that C p-a and C 0 are on the same order of magnitude if the bound photon modes inside the slab are constructed from combinations of the surface photon states. It is thus clear that in the general case, amplification of evanescent waves requires operation much closer to an e ...
... that in Eq. 共3兲. We note that C p-a and C 0 are on the same order of magnitude if the bound photon modes inside the slab are constructed from combinations of the surface photon states. It is thus clear that in the general case, amplification of evanescent waves requires operation much closer to an e ...
Evidence for wavelength dependence of the scattering phase
... Hydroscat-2 data presented in this paper have been corrected with values of total absorption and scattering derived from AC-9 measurements in which the standard scattering correction algorithm was used. Since positive errors in a and negative errors in b partially cancel in Eq. 3c, and k0 ⬎ k1 ⬎ k2 ...
... Hydroscat-2 data presented in this paper have been corrected with values of total absorption and scattering derived from AC-9 measurements in which the standard scattering correction algorithm was used. Since positive errors in a and negative errors in b partially cancel in Eq. 3c, and k0 ⬎ k1 ⬎ k2 ...
Enhancing four-wave-mixing processes by nanowire arrays coupled to a gold film Ekaterina Poutrina,
... 30. A. T. Georges, “Theory of nonlinear excitation of surface plasmon polaritons by four-wave mixing,” J. Opt. Soc. ...
... 30. A. T. Georges, “Theory of nonlinear excitation of surface plasmon polaritons by four-wave mixing,” J. Opt. Soc. ...
CHAPTER 1 Wave Nature of Light
... • To obtain stimulated emission, the incoming photon should not be absorbed by another atom at E1. • We must have the majority of the atoms at the energy level E2. • When there are more atoms at E2 than at E1 we then have what is called a population inversion. • With only two levels we can never ach ...
... • To obtain stimulated emission, the incoming photon should not be absorbed by another atom at E1. • We must have the majority of the atoms at the energy level E2. • When there are more atoms at E2 than at E1 we then have what is called a population inversion. • With only two levels we can never ach ...
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.