Second Harmonic Generation in Photonic Crystals UNIVERSITAT POLITECNICA DE CATALUNYA
... the fundamental and SH beams necessary for a continuous growth of the SH intensity is provided by the bending of the dispersion curve at the boundary of the forbidden zone or Bragg reflection band. Since each crystal has a different lattice constant, it is expected that the resulting SH beam appears ...
... the fundamental and SH beams necessary for a continuous growth of the SH intensity is provided by the bending of the dispersion curve at the boundary of the forbidden zone or Bragg reflection band. Since each crystal has a different lattice constant, it is expected that the resulting SH beam appears ...
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... seen from the figure that at delay times larger than about 0.5 ps, the off-axis intensity is larger than the on-axis one. It is also the case with negative delay time smaller than about −0.5 ps. This means that the spatial distribution of the intensity exhibits a ring-like profile at these delay tim ...
... seen from the figure that at delay times larger than about 0.5 ps, the off-axis intensity is larger than the on-axis one. It is also the case with negative delay time smaller than about −0.5 ps. This means that the spatial distribution of the intensity exhibits a ring-like profile at these delay tim ...
First-Principles Studies of Paramagnetic Vivianite Fe3(PO4)2·8H2O
... bulk vivianite, Fe3(PO4)2·8H2O (010)-(1 × 1) slab and Fe3(PO4)2·8H2O (100)-(1 × 1) slab, respectively), we converge the total energy to <1 meV/atom. In the case of the surfaces, they were modeled using periodic slabs with three layers and 15 Å vacuum along the [001] direction. All the structures und ...
... bulk vivianite, Fe3(PO4)2·8H2O (010)-(1 × 1) slab and Fe3(PO4)2·8H2O (100)-(1 × 1) slab, respectively), we converge the total energy to <1 meV/atom. In the case of the surfaces, they were modeled using periodic slabs with three layers and 15 Å vacuum along the [001] direction. All the structures und ...
The orbital angular momentum of light
... In this study, we were most interested in the set of modes known as the LaguerreGaussian (LG) modes. The electric field of the LG modes is characterized by two indices, usually p and l. Here we restrict ourselves to an investigation of the subset of the LG modes whose p index is 0. The index l can t ...
... In this study, we were most interested in the set of modes known as the LaguerreGaussian (LG) modes. The electric field of the LG modes is characterized by two indices, usually p and l. Here we restrict ourselves to an investigation of the subset of the LG modes whose p index is 0. The index l can t ...
SO2 DETECTION USING PLASMON DAMPING By ELI KASA
... apparent, over the years, that SOx adversely deteriorate the performance of catalytic converters by reducing catalyst efficiency and competing with other emission species in chemical reactions, which otherwise convert exhaust NOx, PM and CO into nontoxic compounds [20-23]. SOx are also the precursor ...
... apparent, over the years, that SOx adversely deteriorate the performance of catalytic converters by reducing catalyst efficiency and competing with other emission species in chemical reactions, which otherwise convert exhaust NOx, PM and CO into nontoxic compounds [20-23]. SOx are also the precursor ...
Growth Mechanism and Electronic Structure of Zn3P2 on the Ga
... at high temperatures (300, 490, and 560 °C). Our XPS data showed that the films grown at >400 °C did not contain Zn, which is supported by previous reports of Zn desorption occurring below 323 °C, depending on the coverage and surface properties.21,22 Thus, we expect that the films grown at high tempe ...
... at high temperatures (300, 490, and 560 °C). Our XPS data showed that the films grown at >400 °C did not contain Zn, which is supported by previous reports of Zn desorption occurring below 323 °C, depending on the coverage and surface properties.21,22 Thus, we expect that the films grown at high tempe ...
Ionization of Rydberg atoms by standing
... previous Rydberg-atom wave packet experiments to probe the probability of the wave packet return to the nucleus7,8. However, the argument has never been directly verified with a photoionization probe that has sub-atomic spatial resolution. Here, we investigate the photoionization process as a functio ...
... previous Rydberg-atom wave packet experiments to probe the probability of the wave packet return to the nucleus7,8. However, the argument has never been directly verified with a photoionization probe that has sub-atomic spatial resolution. Here, we investigate the photoionization process as a functio ...
VCE Physics 2013–2016 Written examination Examination specifi cations Overall conditions
... • Section B will cover Area of study 3 of Units 3 and 4: the Detailed studies. Students will have to respond to only one Detailed study. – Einstein’s special relativity OR – Materials and their use in structures OR – Further electronics OR – Synchrotron and its applications OR – Photonics OR – Soun ...
... • Section B will cover Area of study 3 of Units 3 and 4: the Detailed studies. Students will have to respond to only one Detailed study. – Einstein’s special relativity OR – Materials and their use in structures OR – Further electronics OR – Synchrotron and its applications OR – Photonics OR – Soun ...
Unit XI Laboratory work № 11 Physical chemistry Questions: Surface
... This theory is used in cases of low temperature and high concentrations of adsorbate. The adsorption occurs on solids. A few layers of molecules are formed. OA – monomolecular layer; AB – the area is close to saturation. Adsorption rises sharply and is finished by the concentration of vapor is narro ...
... This theory is used in cases of low temperature and high concentrations of adsorbate. The adsorption occurs on solids. A few layers of molecules are formed. OA – monomolecular layer; AB – the area is close to saturation. Adsorption rises sharply and is finished by the concentration of vapor is narro ...
On the small-angle X-ray scattering of rigid-rod
... Chevrons have been observed on occasion in dark-field imaging of PBO 8, as have rhombohedral crystallites in slow-coagulated films of PPTA 44. Lamellar surfaces at 60 ° to the fibre axis have 15% more surface area than do surfaces at 90° to the fibre axis. Thus, rhombohedral shapes might be expected ...
... Chevrons have been observed on occasion in dark-field imaging of PBO 8, as have rhombohedral crystallites in slow-coagulated films of PPTA 44. Lamellar surfaces at 60 ° to the fibre axis have 15% more surface area than do surfaces at 90° to the fibre axis. Thus, rhombohedral shapes might be expected ...
Phys. Rev. Lett. 87, 160405
... 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-z plane extends along the x direction, such that the resu ...
... 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-z plane extends along the x direction, such that the resu ...
Department of Physics, Chemistry and Biology
... Ellipsometry is a technique very sensitive to surface layers and is therefore suitable for thin film studies but also for surface and interface characterization, e.g. for measuring optical properties and thickness of single surface films and multilayers. One of its main advantages is that it is non- ...
... Ellipsometry is a technique very sensitive to surface layers and is therefore suitable for thin film studies but also for surface and interface characterization, e.g. for measuring optical properties and thickness of single surface films and multilayers. One of its main advantages is that it is non- ...
Total Internal Reflection Spectroscopy for Studying Soft Matter
... most common with infrared light, although UV or visible light can also be used. In the second group the absorption of light is insignificant (although not actually zero, since some of the incident light is scattered or absorbed then re-emitted for the process to work) and the spectrum is contained i ...
... most common with infrared light, although UV or visible light can also be used. In the second group the absorption of light is insignificant (although not actually zero, since some of the incident light is scattered or absorbed then re-emitted for the process to work) and the spectrum is contained i ...
3 Theoretical framework
... Now we recall Eq. 3.1.5, the original Fourier series representing the unit amplitude square wave profile, to see that Eq. 3.2.10 is merely the expression of a sum of scaled square wave profiles, with a shear along the xf plane. That is, on the focal plane of the objective we find a superposition of ...
... Now we recall Eq. 3.1.5, the original Fourier series representing the unit amplitude square wave profile, to see that Eq. 3.2.10 is merely the expression of a sum of scaled square wave profiles, with a shear along the xf plane. That is, on the focal plane of the objective we find a superposition of ...
Photoemission Stuides of a New Topological Insulator Class: Experimental Discovery of the Bi 2 X 3 Topological Insulator Class
... then scatter into the right-moving spin-↑ channel without picking up a phase difference, which allows it to interfere destructively. This odd-even effect was pointed out by Qi and Zhang [13], which ties directly to the Z2 number in the context of topological insulators. One must also note that if th ...
... then scatter into the right-moving spin-↑ channel without picking up a phase difference, which allows it to interfere destructively. This odd-even effect was pointed out by Qi and Zhang [13], which ties directly to the Z2 number in the context of topological insulators. One must also note that if th ...
ABSTRACT Dissertation: STUDIES OF
... micrometer scale, which is in the visible light range. We know that scattering and diffraction happen when the object size is on the same order of the impinging light wavelength. However, when the dimension of an object is in the nanometer range, a lot of optical properties change. For example, from ...
... micrometer scale, which is in the visible light range. We know that scattering and diffraction happen when the object size is on the same order of the impinging light wavelength. However, when the dimension of an object is in the nanometer range, a lot of optical properties change. For example, from ...
Role of hydroxyl groups for the O2 adsorption on CeO2 surface: A
... that we have also performed calculations for O2 adsorption on a rather broad supercell, p(2 4) (1 1 0) surface. It is shown that the one row of the unit cell is sufficient due to the difference in the calculated adsorption energies is negligible (less than 0.1 kcal/mol). As mentioned as above, CO o ...
... that we have also performed calculations for O2 adsorption on a rather broad supercell, p(2 4) (1 1 0) surface. It is shown that the one row of the unit cell is sufficient due to the difference in the calculated adsorption energies is negligible (less than 0.1 kcal/mol). As mentioned as above, CO o ...
Radar Scattering from a Self-Aff ine Fractal Surface: Near
... the wavelength. This allowed traditional ray or physical optics methods and equations to be utilized, including the wellknown Fresnel reflection equations for smooth surfaces. While the assumption of a smooth surface at the wavelength scale is mathematically convenient, it is probably not realistic ...
... the wavelength. This allowed traditional ray or physical optics methods and equations to be utilized, including the wellknown Fresnel reflection equations for smooth surfaces. While the assumption of a smooth surface at the wavelength scale is mathematically convenient, it is probably not realistic ...
THE FRESNEL DIFFRACTION : A STORY OF LIGHT AND DARKNESS
... the propagation of the wave writes as a convolution relationship, the impulse response being a quadratic phase factor. We give the corresponding filter in the Fourier plane. As an illustration, we describe the propagation of wave with a spatial sinusoidal amplitude, introduce lenses as quadratic pha ...
... the propagation of the wave writes as a convolution relationship, the impulse response being a quadratic phase factor. We give the corresponding filter in the Fourier plane. As an illustration, we describe the propagation of wave with a spatial sinusoidal amplitude, introduce lenses as quadratic pha ...
Introduction - Strathprints
... surface reconstruction. Here, the development of a model that can be used to quantitatively describe the enhanced SH signal observed in the presence of an anodic oxide film on a non-centrosymmetric substrate, Hg1xCdxTe (MCT), is described. The aim is to further expand the utility of SHG for probing ...
... surface reconstruction. Here, the development of a model that can be used to quantitatively describe the enhanced SH signal observed in the presence of an anodic oxide film on a non-centrosymmetric substrate, Hg1xCdxTe (MCT), is described. The aim is to further expand the utility of SHG for probing ...
The Diagnostics System at the Cryogenic Storage Ring CSR
... charged molecules and free electrons of the electron cooler. The neutral fragments from this process are detected with a position sensitive detector. The profile of the stored ion beam can be calculated from the distribution of the center of mass positions of the neutral fragments created in the DR ...
... charged molecules and free electrons of the electron cooler. The neutral fragments from this process are detected with a position sensitive detector. The profile of the stored ion beam can be calculated from the distribution of the center of mass positions of the neutral fragments created in the DR ...
Absence of Evidence ? Evidence of Absence
... coupled with energy dispersive X-ray spectroscopy (EDS/EDX)9 and/ or electron energy loss spectroscopy (EELS)10,11 provide techniques which can resolve single atoms spatially and elementally, but are limited to very small sample volumes (areas of a few nm2 within a single atomic layer such as graphe ...
... coupled with energy dispersive X-ray spectroscopy (EDS/EDX)9 and/ or electron energy loss spectroscopy (EELS)10,11 provide techniques which can resolve single atoms spatially and elementally, but are limited to very small sample volumes (areas of a few nm2 within a single atomic layer such as graphe ...
Reflection high-energy electron diffraction
Reflection high-energy electron diffraction (RHEED) is a technique used to characterize the surface of crystalline materials. RHEED systems gather information only from the surface layer of the sample, which distinguishes RHEED from other materials characterization methods that also rely on diffraction of high-energy electrons. Transmission electron microscopy, another common electron diffraction method samples the bulk of the sample due to the geometry of the system. Low-energy electron diffraction (LEED) is also surface sensitive, but LEED achieves surface sensitivity through the use of low energy electrons.