LUMINOSITY ENHANCEMENT BY A SELF
... where ,f$ is the value at the waist that would be formed in the absence of the l&s. ...
... where ,f$ is the value at the waist that would be formed in the absence of the l&s. ...
further experimental investigations on the dieléctric losses of quartz
... " bleaching at 550°C. Surprisingly enough, the peak at 60 OK has almost disappeared, whereas a peak at 38 OK has come into existence. This is probably a spurious effect. Peaks at 38 OK practically always occur in the synthetic clear crystals, where we find them to be the dominant ones. We shall prov ...
... " bleaching at 550°C. Surprisingly enough, the peak at 60 OK has almost disappeared, whereas a peak at 38 OK has come into existence. This is probably a spurious effect. Peaks at 38 OK practically always occur in the synthetic clear crystals, where we find them to be the dominant ones. We shall prov ...
Optical Properties of Nanostructures
... 1.3.1. Bragg Diffraction The fundamental mechanism determining the properties of photonic crystals is due to interference, and is called Bragg diffraction. ...
... 1.3.1. Bragg Diffraction The fundamental mechanism determining the properties of photonic crystals is due to interference, and is called Bragg diffraction. ...
Novel optical phenomena with photonic crystals
... medium is usually accurate only when the frequency is in the lowest few bands and away from the band edge. As the frequency approaches the band edge or goes into higher photonic bands, each photonic mode begins to exhibit strong, wavelength-scale spatial modulations, and more than one distinct modes ...
... medium is usually accurate only when the frequency is in the lowest few bands and away from the band edge. As the frequency approaches the band edge or goes into higher photonic bands, each photonic mode begins to exhibit strong, wavelength-scale spatial modulations, and more than one distinct modes ...
appel a projets recherche 2014 - lumat - Université Paris-Sud
... The primary process for the energy deposition is direct photoionization of the solid by the incident XUV pulse, with a strong dependence with respect of the energy (wavelength) of the photons. Our particular interest is to investigate X-ray emission from hole states transitions rather than usual res ...
... The primary process for the energy deposition is direct photoionization of the solid by the incident XUV pulse, with a strong dependence with respect of the energy (wavelength) of the photons. Our particular interest is to investigate X-ray emission from hole states transitions rather than usual res ...
Appendix D – Raman Spectra
... distribution of peaks is quite wide over the RBM range. This essentially indicates that the sample has a wide Gaussian distribution of diameters, as opposed to having a sample with a fairly low deviation in diameter. Although only two peaks were resolved in the 785 nm spectrum, there was a high Rama ...
... distribution of peaks is quite wide over the RBM range. This essentially indicates that the sample has a wide Gaussian distribution of diameters, as opposed to having a sample with a fairly low deviation in diameter. Although only two peaks were resolved in the 785 nm spectrum, there was a high Rama ...
Optical and acoustic beam shaping for imaging and
... graduate study. It has been a great pleasure and honour to work with all of them. First, I would like to thank my supervisor, Mike MacDonald. From my first visit to Institute of Medical Science and Technology (IMSaT) in September 2010, I knew this would be where I want to perform research. Mike has ...
... graduate study. It has been a great pleasure and honour to work with all of them. First, I would like to thank my supervisor, Mike MacDonald. From my first visit to Institute of Medical Science and Technology (IMSaT) in September 2010, I knew this would be where I want to perform research. Mike has ...
The Theory of Diffraction Tomography
... bone tissue in the human body. The 3D object is reconstructed from transmission images at different angles, i.e. from projections onto a two-dimensional (2D) detector plane. The assumption that the recorded data are in fact projections is only valid for non-scattering objects, i.e. when the imaging ...
... bone tissue in the human body. The 3D object is reconstructed from transmission images at different angles, i.e. from projections onto a two-dimensional (2D) detector plane. The assumption that the recorded data are in fact projections is only valid for non-scattering objects, i.e. when the imaging ...
D.C. electrical conductivity measurements on ADP single crystals
... for by motion of protons accompanied by a D defect (excess of positive charge). Migration of these defects may only modify electric polarization and may not change the charge at an electrode (Freeda and Mahadevan 2000). The motion of defects occurs by some kind of rotation in the bond with defects. ...
... for by motion of protons accompanied by a D defect (excess of positive charge). Migration of these defects may only modify electric polarization and may not change the charge at an electrode (Freeda and Mahadevan 2000). The motion of defects occurs by some kind of rotation in the bond with defects. ...
To be published in Optics Letters: Title: Generation of linear and nonlinear nonparaxial accelerating beams Peng Zhang, Yi Hu, Drake Cannan, Alessandro Salandrino, Tongcang Li Li,
... possibility is to use nonlinearity for self-trapping of Airy beams, leading to a soliton-like propagation of selfaccelerating beams [5-7]. Limited by their paraxial nature, Airy beams cannot maintain their shape-preserving property when bending to larger angles. Thus, it is important to identify mec ...
... possibility is to use nonlinearity for self-trapping of Airy beams, leading to a soliton-like propagation of selfaccelerating beams [5-7]. Limited by their paraxial nature, Airy beams cannot maintain their shape-preserving property when bending to larger angles. Thus, it is important to identify mec ...
Channeling of neutral particles in micro
... N / Rÿ1=2 (since the waves reflected by the interfaces add up in the phase). Moreover, Bragg conditions must be met if effective interference of the reflected waves is to be achieved. All this suggests that there is a need to fabricate ultrathin continuous films with a thickness of several atomic mo ...
... N / Rÿ1=2 (since the waves reflected by the interfaces add up in the phase). Moreover, Bragg conditions must be met if effective interference of the reflected waves is to be achieved. All this suggests that there is a need to fabricate ultrathin continuous films with a thickness of several atomic mo ...
Laser and Gaussian Beam Propagation and Transformation
... Optical engineers and researchers working on optics deal with laser beams and optical systems as usual tools in their specific areas. The knowledge of the special characteristics of the propagation of laser beams through optical systems has to be one of the keystones of their actual work, and the cl ...
... Optical engineers and researchers working on optics deal with laser beams and optical systems as usual tools in their specific areas. The knowledge of the special characteristics of the propagation of laser beams through optical systems has to be one of the keystones of their actual work, and the cl ...
Adaptive Speckle Imaging Interferometry, a new technique for a
... ensemble of photon paths. This condition is normally met, since the scatterers move substantially and explore a significant fraction of all possible configurations during the measurement time. Thus time and ensemble averages are equivalent, a condition referred to as ergodicity. In other words, if t ...
... ensemble of photon paths. This condition is normally met, since the scatterers move substantially and explore a significant fraction of all possible configurations during the measurement time. Thus time and ensemble averages are equivalent, a condition referred to as ergodicity. In other words, if t ...
Wave-mixing solitons in ferroelectric crystals
... obtained for the description of four wave-mixing in transmission geometry, it describes self-diffraction of the wave from shifted gratings as well. The sine-Gordon equation governs the soliton propagation. • The photoinduced amplitude of the refractive-index grating exhibits also a soliton shape in ...
... obtained for the description of four wave-mixing in transmission geometry, it describes self-diffraction of the wave from shifted gratings as well. The sine-Gordon equation governs the soliton propagation. • The photoinduced amplitude of the refractive-index grating exhibits also a soliton shape in ...
A few words about possible applications
... properties for a dedicated structure without making a calculation of all the possible designs. ...
... properties for a dedicated structure without making a calculation of all the possible designs. ...
Enhanced 3D spatial resolution in quantitative phase
... Quantitative phase imaging is commonly used with coherent illumination because it allows a relatively simple interpretation of the measurement, but the drawback is that it also genarates speckle distribution in the images. Only a few techniques can deal with a low temporal coherent source [6,7,9,11, ...
... Quantitative phase imaging is commonly used with coherent illumination because it allows a relatively simple interpretation of the measurement, but the drawback is that it also genarates speckle distribution in the images. Only a few techniques can deal with a low temporal coherent source [6,7,9,11, ...
Theory of the transmission properties of an optical far-field superlens
... transmitted and incident transverse wavenumbers, respectively; ⌳ = 2 / d is the grating wavenumber, where d is the periodicity; and p is the diffraction order. We are interested only in waves transmitted in the far field, i.e., far enough from the FSL and the object plan that the contribution of ev ...
... transmitted and incident transverse wavenumbers, respectively; ⌳ = 2 / d is the grating wavenumber, where d is the periodicity; and p is the diffraction order. We are interested only in waves transmitted in the far field, i.e., far enough from the FSL and the object plan that the contribution of ev ...
Wave optical simulations of x-ray nano
... Introduction The primordinal object of this thesis was to obtain an analytical and numerical description of focusing multilayer (ML) mirrors, that are mainly used at the European Synchrotron Radiation Facility (ESRF) in Grenoble, France. ML mirrors provide high quality x-ray beams for investigation ...
... Introduction The primordinal object of this thesis was to obtain an analytical and numerical description of focusing multilayer (ML) mirrors, that are mainly used at the European Synchrotron Radiation Facility (ESRF) in Grenoble, France. ML mirrors provide high quality x-ray beams for investigation ...
Clutter elimination for deep clinical optoacoustic imaging using
... (Fig. 2a). The resulting strong OA transients, even though detected by the probe at an angle where elevational sensitivity is low, can obscure the weak OA signals from structures deep inside the tissue. Echo clutter (Fig. 2b) may be generated by the same OA transients that cause direct clutter, but ...
... (Fig. 2a). The resulting strong OA transients, even though detected by the probe at an angle where elevational sensitivity is low, can obscure the weak OA signals from structures deep inside the tissue. Echo clutter (Fig. 2b) may be generated by the same OA transients that cause direct clutter, but ...
Apodized Chirped Fiber Bragg Gratings for Wavelength Shift Compensation under... Level
... at T o , áË is the thermal expansion coefficient and á n is the thermo-optical coefficient of the FBG. The signal propagating with a high power causes a perturbation in the molecules resulting in a ...
... at T o , áË is the thermal expansion coefficient and á n is the thermo-optical coefficient of the FBG. The signal propagating with a high power causes a perturbation in the molecules resulting in a ...
Photonic Crystals - Materials Computation Center
... “ If only were possible to make materials in which electromagnetically waves cannot propagate at certain frequencies, all kinds of almost-magical things would happen” Sir John Maddox, Nature (1990) ...
... “ If only were possible to make materials in which electromagnetically waves cannot propagate at certain frequencies, all kinds of almost-magical things would happen” Sir John Maddox, Nature (1990) ...
21.pdf
... The recently reported inward growing self-assembling method is used to fabricate photonic crystal heterostructures in less than 6 h using polymeric colloidal suspensions. Structural characterization shows good ordering of the two types of photonic crystals constituting the heterostructure. The refle ...
... The recently reported inward growing self-assembling method is used to fabricate photonic crystal heterostructures in less than 6 h using polymeric colloidal suspensions. Structural characterization shows good ordering of the two types of photonic crystals constituting the heterostructure. The refle ...
Get
... beam with N = 5, ␣s = 1.8 cm exactly matches Fig. 3 of Ref. 20 for N = 5. Figure 3 of the current paper demonstrates that, at the given source and propagation settings, in terms of the scintillation index, the cos–Gaussian beam retains the already mentioned property of being advantageous at short pr ...
... beam with N = 5, ␣s = 1.8 cm exactly matches Fig. 3 of Ref. 20 for N = 5. Figure 3 of the current paper demonstrates that, at the given source and propagation settings, in terms of the scintillation index, the cos–Gaussian beam retains the already mentioned property of being advantageous at short pr ...
Physical Optics
... The study of light has been an important part of science from its beginning. The ancient Greeks and, prior to the Middle Ages, Islamic scholars provided important insights. With the coming of the Scientific Revolution in the 16th and 17th centuries, optics, in the shape of telescopes and microscopes ...
... The study of light has been an important part of science from its beginning. The ancient Greeks and, prior to the Middle Ages, Islamic scholars provided important insights. With the coming of the Scientific Revolution in the 16th and 17th centuries, optics, in the shape of telescopes and microscopes ...
THz Materials
... Losses are very low up to mm-wavelengths. TPX has excellent heat resistance and is highly resistant to most organic and inorganic commercial chemicals. ...
... Losses are very low up to mm-wavelengths. TPX has excellent heat resistance and is highly resistant to most organic and inorganic commercial chemicals. ...