Scanning tunneling microscopy and spectroscopy
... check the sample quality. Typical exfoliated graphene flakes are several microns in size, but occasionally one can find larger flakes that can reach several hundred m. Since exfoliation is facilitated by stacking defects, yields tend to be larger when starting with imperfect or turbostratic graphit ...
... check the sample quality. Typical exfoliated graphene flakes are several microns in size, but occasionally one can find larger flakes that can reach several hundred m. Since exfoliation is facilitated by stacking defects, yields tend to be larger when starting with imperfect or turbostratic graphit ...
Ultracold chemistry of a single Rydberg atom in a rubidium
... In general, these kind of scattering processes are sufficiently described in terms of s-wave scattering, for a non-singular p-wave contribution [20]. The calculations of I. I. Fabrikant [10] reveals the presence of a low-energy e− -Rb(5S) p-wave shape resonance for an energy of Er = 23 meV, which wa ...
... In general, these kind of scattering processes are sufficiently described in terms of s-wave scattering, for a non-singular p-wave contribution [20]. The calculations of I. I. Fabrikant [10] reveals the presence of a low-energy e− -Rb(5S) p-wave shape resonance for an energy of Er = 23 meV, which wa ...
Development of Optical Sensor Platforms based on - DORAS
... A study of the principles, fabrication and behaviour of a range of optical sensor platforms based on evanescent wave interactions is presented. The platforms utilise a range of sensing techniques including absorption, fluorescence quenching and surface plasmon resonance. The absorbance-based platfor ...
... A study of the principles, fabrication and behaviour of a range of optical sensor platforms based on evanescent wave interactions is presented. The platforms utilise a range of sensing techniques including absorption, fluorescence quenching and surface plasmon resonance. The absorbance-based platfor ...
Experiments and theory in cold and ultracold collisions
... inhomogeneous Doppler broadening to less than a natural line width of an atomic transition and transferring the optical-particle interaction from the ‘‘chemical’’ zone of strong wave-function overlap to an outer region where weak electrostatic terms characterize the collision. In this weakly interac ...
... inhomogeneous Doppler broadening to less than a natural line width of an atomic transition and transferring the optical-particle interaction from the ‘‘chemical’’ zone of strong wave-function overlap to an outer region where weak electrostatic terms characterize the collision. In this weakly interac ...
Integration of Magneto Optical Traps in Atom Chips
... mirrors for the purposes of integrated laser cooling and trapping of atoms on an atom chip. A single incident circularly polarised laser beam is reflected inside the pyramid hollow creating all the required beams of the correct polarisation to create a magneto optical trap (MOT). Many pyramids can b ...
... mirrors for the purposes of integrated laser cooling and trapping of atoms on an atom chip. A single incident circularly polarised laser beam is reflected inside the pyramid hollow creating all the required beams of the correct polarisation to create a magneto optical trap (MOT). Many pyramids can b ...
- UCL Discovery
... geometry optimization of the low-Miller index surfaces of FeS, we have shown the (001) surface terminated by sulfur atoms is by far the most energetically stable surface of FeS. The calculated surface energies are used successfully to reproduce the observed crystal morphology of FeS. As an extension ...
... geometry optimization of the low-Miller index surfaces of FeS, we have shown the (001) surface terminated by sulfur atoms is by far the most energetically stable surface of FeS. The calculated surface energies are used successfully to reproduce the observed crystal morphology of FeS. As an extension ...
Week 3 July 22, 2016 Worksheet Review III 1 mol = 6.022 × 1023 1
... 1.807 × 1024 atoms are present in the sample True. We know that for every 1 molecule of H2O, we have 2 atoms of H and 1 atom of O. So we every 1 molecule of H2O has 3 atoms. 3× (6.022 × 1023 molecules H 2O) = 1.807 × 1024 atoms ...
... 1.807 × 1024 atoms are present in the sample True. We know that for every 1 molecule of H2O, we have 2 atoms of H and 1 atom of O. So we every 1 molecule of H2O has 3 atoms. 3× (6.022 × 1023 molecules H 2O) = 1.807 × 1024 atoms ...
Cavity Quantum Electrodynamics with Ultracold Atoms
... when the light is scattered from a laser into the resonator by a periodic array of atoms and the geometry of the system is such that coherent scattering is suppressed. For the phase-matching conditions, at which in free space the light is in a squeezed-vacuum state [10], we find that inside a resonat ...
... when the light is scattered from a laser into the resonator by a periodic array of atoms and the geometry of the system is such that coherent scattering is suppressed. For the phase-matching conditions, at which in free space the light is in a squeezed-vacuum state [10], we find that inside a resonat ...
Sample Assessment Materials - Edexcel
... (ii) X-ray diffraction can be used to locate atoms or ions in molecules like chlorophyll. X-rays are scattered by the electrons in atoms and ions. In chlorophyll the atoms of one of the elements still cannot be located with certainty by this technique. Suggest which element is most difficult to loca ...
... (ii) X-ray diffraction can be used to locate atoms or ions in molecules like chlorophyll. X-rays are scattered by the electrons in atoms and ions. In chlorophyll the atoms of one of the elements still cannot be located with certainty by this technique. Suggest which element is most difficult to loca ...
Define resistance V splitting between components V
... state light dependence of resistance of LDR (using graph) PD from potential divider calc V=IR calc graph skills Explain why V changes more at low light intensity than high for LDR effect of rising resistance of one component on a circuit advantages of a data logger 5. Waves [16 marks] state a proper ...
... state light dependence of resistance of LDR (using graph) PD from potential divider calc V=IR calc graph skills Explain why V changes more at low light intensity than high for LDR effect of rising resistance of one component on a circuit advantages of a data logger 5. Waves [16 marks] state a proper ...
Optical Properties of Low-Dimensional Semiconductor Nanostructures under High Pressure
... The vibrational properties of Si1−x Gex alloys have been studied by measuring the compositional dependence of their optical-phonon deformation potentials (K̃11 and K̃12 ). For this purpose SiGe/Si(100) strained layers were grown by molecular beam epitaxy and characterized combining Raman scattering ...
... The vibrational properties of Si1−x Gex alloys have been studied by measuring the compositional dependence of their optical-phonon deformation potentials (K̃11 and K̃12 ). For this purpose SiGe/Si(100) strained layers were grown by molecular beam epitaxy and characterized combining Raman scattering ...
LIGHT GENERATION AND MANIPULATION FROM NONLINEAR RANDOMLY DISTRIBUTED DOMAINS IN SBN
... The goal of this thesis is to investigate the coherent effects in the nonlinear light generation in random structures. Additionally, inspired by recent works in the control of linear light scattering through random media, we implement a novel method to re-concentrate the scattered light generation ...
... The goal of this thesis is to investigate the coherent effects in the nonlinear light generation in random structures. Additionally, inspired by recent works in the control of linear light scattering through random media, we implement a novel method to re-concentrate the scattered light generation ...
INFLUENCES OF THE MOLE RATIO SnO2/NaOH ON THE
... nanorods’ growth mechanism can be understood on the basis of oriented aggregation by polar forces. The primary seed of crystal can transform in to SnO2 nanorods by oriented aggregation. Jiggling seed of crystal by the driving force may allow adjacent seed of crystal to construct the low- energy stru ...
... nanorods’ growth mechanism can be understood on the basis of oriented aggregation by polar forces. The primary seed of crystal can transform in to SnO2 nanorods by oriented aggregation. Jiggling seed of crystal by the driving force may allow adjacent seed of crystal to construct the low- energy stru ...
High Power Optically Pumped Semiconductor Lasers for Sodium
... Optically pumped semiconductor lasers (OPSLs) are shown to provide a much more compact and less expensive source for illumination of the sodium layer of the mesosphere for use as a sodium laser guidestar via single and two photon excitation schemes. This represents a revolution in laser guidestar te ...
... Optically pumped semiconductor lasers (OPSLs) are shown to provide a much more compact and less expensive source for illumination of the sodium layer of the mesosphere for use as a sodium laser guidestar via single and two photon excitation schemes. This represents a revolution in laser guidestar te ...
Main_Article_revised_version
... efficient electron transfer (τ ≈ 3 ms). Hole scavenging by alcohols on mesoporous rutile was substantially less efficient and more reversible than anatase, resulting in only a marginal increase in electron lifetime. The lower activity of rutile was not due to differences in recombination, but rather ...
... efficient electron transfer (τ ≈ 3 ms). Hole scavenging by alcohols on mesoporous rutile was substantially less efficient and more reversible than anatase, resulting in only a marginal increase in electron lifetime. The lower activity of rutile was not due to differences in recombination, but rather ...
Chapter 4 Optical Resonator
... 2. Semiconductor lasers are often fabricated from crystals whose surfaces are cleaved along crystal planes. These surfaces act as reflectors and therefore serve as the resonator mirrors. Consider a crystal with refractive index n = 3.6 placed in air (n = 1). The light reflects between two parallel s ...
... 2. Semiconductor lasers are often fabricated from crystals whose surfaces are cleaved along crystal planes. These surfaces act as reflectors and therefore serve as the resonator mirrors. Consider a crystal with refractive index n = 3.6 placed in air (n = 1). The light reflects between two parallel s ...
Soliton Interactions and the Formation of Solitonic Patterns
... 1.1 Solitons and the dynamics of pattern formation Everyone in America knows what a fractal is. Take a stroll around any college campus and you will pass by young computer scientists wearing T-shirts emblazoned with brightly colored spiraling patterns. In the corporate world, fractals thrive in the ...
... 1.1 Solitons and the dynamics of pattern formation Everyone in America knows what a fractal is. Take a stroll around any college campus and you will pass by young computer scientists wearing T-shirts emblazoned with brightly colored spiraling patterns. In the corporate world, fractals thrive in the ...
chapter 4 starfish - Grupo de Óptica
... This thesis is devoted to the development of a technique for the measurement of the spatiotemporal amplitude and phase of ultrashort laser pulses and its applications. The core of the thesis is divided into three parts, which correspond to the presentation of the technique (Part I), its applications ...
... This thesis is devoted to the development of a technique for the measurement of the spatiotemporal amplitude and phase of ultrashort laser pulses and its applications. The core of the thesis is divided into three parts, which correspond to the presentation of the technique (Part I), its applications ...
Edita Pusvaškienė
... human health and to the environment. Because of these disadvantages, developing of new, fast, inexpensive, environmentally friendly and easy to use microextraction techniques has been gaining a growing interest. Solid phase microextraction (SPME) is a miniaturised version of traditional solid phase ...
... human health and to the environment. Because of these disadvantages, developing of new, fast, inexpensive, environmentally friendly and easy to use microextraction techniques has been gaining a growing interest. Solid phase microextraction (SPME) is a miniaturised version of traditional solid phase ...
Get cached PDF
... The full-text may be used and/or reproduced, and given to third parties in any format or medium, without prior permission or charge, for personal research or study, educational, or not-for-profit purposes provided that: • a full bibliographic reference is made to the original source • a link is made ...
... The full-text may be used and/or reproduced, and given to third parties in any format or medium, without prior permission or charge, for personal research or study, educational, or not-for-profit purposes provided that: • a full bibliographic reference is made to the original source • a link is made ...
in Optical Fibers Quantum Noise Reduction with Pulsed Light
... Optical fibers offer considerable advantages over bulk nonlinear media for the generation of squeezed states. This thesis reports on experimental investigations of reducing quantum noise by means of squeezing in nonlinear fiber optic interferometers. Fibers have low insertion loss which allows for l ...
... Optical fibers offer considerable advantages over bulk nonlinear media for the generation of squeezed states. This thesis reports on experimental investigations of reducing quantum noise by means of squeezing in nonlinear fiber optic interferometers. Fibers have low insertion loss which allows for l ...
analytical applications of surface-modified fused silica capillaries
... Fused silica capillaries have become a major tool for many applications in analytical chemistry. These capillaries are physically robust, permit gasses or solutions to be introduced and pumped through with relative ease, and due to their small dimensions allow fast mass transfer to and from the capi ...
... Fused silica capillaries have become a major tool for many applications in analytical chemistry. These capillaries are physically robust, permit gasses or solutions to be introduced and pumped through with relative ease, and due to their small dimensions allow fast mass transfer to and from the capi ...
Gaussian Beam Propagation
... Gaussian beams play such an important role in optical lasers as well as in longer wavelength systems that they have been extensively analyzed, starting with some of the classic treatments mentioned in Chapter 1. Almost every text on optical systems discusses Gaussian beam propagation in some detail, ...
... Gaussian beams play such an important role in optical lasers as well as in longer wavelength systems that they have been extensively analyzed, starting with some of the classic treatments mentioned in Chapter 1. Almost every text on optical systems discusses Gaussian beam propagation in some detail, ...
X-ray fluorescence
X-ray fluorescence (XRF) is the emission of characteristic ""secondary"" (or fluorescent) X-rays from a material that has been excited by bombarding with high-energy X-rays or gamma rays. The phenomenon is widely used for elemental analysis and chemical analysis, particularly in the investigation of metals, glass, ceramics and building materials, and for research in geochemistry, forensic science and archaeology.