Laser in dentistry
... laser beam can be very small (insignificant), the laser light is highly collimated which means that there is minimum loss of power along the laser beam. Brightness: As laser light travels in a parallel bundle ,so it maintains its concentration, and thus is very intense light. Coherent: The unique c ...
... laser beam can be very small (insignificant), the laser light is highly collimated which means that there is minimum loss of power along the laser beam. Brightness: As laser light travels in a parallel bundle ,so it maintains its concentration, and thus is very intense light. Coherent: The unique c ...
Antimony Oxide Glasses and Their Nanocomposites for Optical
... a novel media for photonic, plasmonic and nanophotonic technologies by incorporating luminescent rare-earth ions, metal nanoparticles, semiconductor nanoparticles, etc and their hybrids [1-3]. Research in these fast emerging areas require development of new glass compositions and in this respect, un ...
... a novel media for photonic, plasmonic and nanophotonic technologies by incorporating luminescent rare-earth ions, metal nanoparticles, semiconductor nanoparticles, etc and their hybrids [1-3]. Research in these fast emerging areas require development of new glass compositions and in this respect, un ...
Lecture 45
... • “Photonic crystals are composed of periodic dielectric or metallo-dielectric nanostructures that affect the propagation of electromagnetic waves (EM) in the same way as the periodic potential in a crystal affects the electron motion by defining allowed and forbidden electronic energy bands. Photon ...
... • “Photonic crystals are composed of periodic dielectric or metallo-dielectric nanostructures that affect the propagation of electromagnetic waves (EM) in the same way as the periodic potential in a crystal affects the electron motion by defining allowed and forbidden electronic energy bands. Photon ...
Light Scattering of Semiconducting Nanoparticles
... the exciting visible laserlight are about 2.5 eV (corresponding to the wavelength L ≈ 500 nm). Therefore, from Eq. (1) we get S ≈ L and the wavevector in a typical backscat ≈ 4n/L and tering experiment will be on the order of q much smaller than the wavevector q = 2/a at the boundary of the ...
... the exciting visible laserlight are about 2.5 eV (corresponding to the wavelength L ≈ 500 nm). Therefore, from Eq. (1) we get S ≈ L and the wavevector in a typical backscat ≈ 4n/L and tering experiment will be on the order of q much smaller than the wavevector q = 2/a at the boundary of the ...
PHYS 4740 Lecture notes 1
... charge). Some solids which display this defect - ZnS, AgCl, AgBr, AgI (due to the comparatively smaller size of Zn2+ and Ag+ ions) To be noted : Ag Br shows both Frenkel as well as Schottky defects. For example, consider a lattice formed by X and M ions. Suppose an M ion leaves the M sublattice, lea ...
... charge). Some solids which display this defect - ZnS, AgCl, AgBr, AgI (due to the comparatively smaller size of Zn2+ and Ag+ ions) To be noted : Ag Br shows both Frenkel as well as Schottky defects. For example, consider a lattice formed by X and M ions. Suppose an M ion leaves the M sublattice, lea ...
10 - PSU MNE
... Once specimen necking starts, the material fails, because the cross-sectional area in the necked region becomes progressively smaller, and thus no additional load is needed to cause further deformation. The stress at which necking occurs is called the ultimate tensile strength of the material or U ...
... Once specimen necking starts, the material fails, because the cross-sectional area in the necked region becomes progressively smaller, and thus no additional load is needed to cause further deformation. The stress at which necking occurs is called the ultimate tensile strength of the material or U ...
Laboratory experiments for exploring the surface plasmon resonance
... interface occurs through the gold thin film, its thickness is critical. If the gold film is too thick, the energy of this evanescent wave is absorbed and the coupling is poor. Inside the gold thin film, the electromagnetic wave undergoes multiple reflections, and this can maximize the transfer of th ...
... interface occurs through the gold thin film, its thickness is critical. If the gold film is too thick, the energy of this evanescent wave is absorbed and the coupling is poor. Inside the gold thin film, the electromagnetic wave undergoes multiple reflections, and this can maximize the transfer of th ...
THz generation by optical rectification of near
... be calculated from measured rather than calculated material parameters for a quantitative comparison [13]. Note that the electro-optic coefficient is not required for the calculation of the optimum crystal length in Section 4. ...
... be calculated from measured rather than calculated material parameters for a quantitative comparison [13]. Note that the electro-optic coefficient is not required for the calculation of the optimum crystal length in Section 4. ...
EQUILIBRIUM MODE DISTRIBUTION IN W
... order modes to couple to higher order ones. Consequently, regardless of whether only the loworder modes were launched by selectively restricted conditions, higher order modes will always appear in the output. Such higher order modes reduce the bandwidth of the W-type fiber and necessitate that the g ...
... order modes to couple to higher order ones. Consequently, regardless of whether only the loworder modes were launched by selectively restricted conditions, higher order modes will always appear in the output. Such higher order modes reduce the bandwidth of the W-type fiber and necessitate that the g ...
Introduction to Materials
... near the interfaces will affect the atomic and electronic structure of the interface and will therefore affect the material’s properties. Thus, mastering the particular physical properties of an application imposes a constraint on the technological quality of the development of these systems on the ...
... near the interfaces will affect the atomic and electronic structure of the interface and will therefore affect the material’s properties. Thus, mastering the particular physical properties of an application imposes a constraint on the technological quality of the development of these systems on the ...
Recent Advances in ALON Optical Ceramic
... through the MWIR as well as RF transparency. Some new systems also require large apertures and consequently larger windows/domes. In addition to the very demanding optical requirements, these large transparencies must also be durable and affordable. For many of these applications sapphire has been t ...
... through the MWIR as well as RF transparency. Some new systems also require large apertures and consequently larger windows/domes. In addition to the very demanding optical requirements, these large transparencies must also be durable and affordable. For many of these applications sapphire has been t ...
Surface Interactions and Microstructural Characterization of API
... thermograms show consistent melting points for crystalline materials and glass transition and crystallization events for amorphous materials. DSC measurements of un-milled, milled and quench melt NDP samples presented the consistent melting point peak. The melt quench sample also show the glass tran ...
... thermograms show consistent melting points for crystalline materials and glass transition and crystallization events for amorphous materials. DSC measurements of un-milled, milled and quench melt NDP samples presented the consistent melting point peak. The melt quench sample also show the glass tran ...
Post-Photoelasticity.pdf
... regardless of the value of N . In addition, I = 0 when N = 0, 1, 2, 3,... and this prescribes the formation of isochromatic fringes in regions of φ ≠ 0°. In essence, the plane polariscope yields the isochromatic pattern, but the intensity of this pattern is modulated by the isoclinic term sin22φ. A ...
... regardless of the value of N . In addition, I = 0 when N = 0, 1, 2, 3,... and this prescribes the formation of isochromatic fringes in regions of φ ≠ 0°. In essence, the plane polariscope yields the isochromatic pattern, but the intensity of this pattern is modulated by the isoclinic term sin22φ. A ...
Monitors - La Salle University
... interact with the charged electrons and protons making up the material. • This can result in reflection or absorption or transmission. • What if the material has a different behaviors in different directions? CSIT 301 (Blum) ...
... interact with the charged electrons and protons making up the material. • This can result in reflection or absorption or transmission. • What if the material has a different behaviors in different directions? CSIT 301 (Blum) ...
Few-layer MoS2 saturable absorbers for short
... where crystallization is achieved at a high vapor pressure reaction and elevated temperatures. In [41], few-layer MoS2 flakes were fabricated by a hydrothermal reaction between sodium molybdate (NaMoO4 ) and silicotungstic acid H4 W12 SiO40 at 240°C for 24 h with thiourea as the sulfurization r ...
... where crystallization is achieved at a high vapor pressure reaction and elevated temperatures. In [41], few-layer MoS2 flakes were fabricated by a hydrothermal reaction between sodium molybdate (NaMoO4 ) and silicotungstic acid H4 W12 SiO40 at 240°C for 24 h with thiourea as the sulfurization r ...
Paper Title
... 4.2 Extinction ratio One important performance parameter for an electro-optic Q-switch is the extinction ratio, ER, defined as the ratio of the transmission when the device is fully open (parallel polarizers) to the transmission when the device is fully closed (crossed ...
... 4.2 Extinction ratio One important performance parameter for an electro-optic Q-switch is the extinction ratio, ER, defined as the ratio of the transmission when the device is fully open (parallel polarizers) to the transmission when the device is fully closed (crossed ...
NONLINEAR OPTICAL PROPERTIES OF NATURAL
... be used as optical materials for industrial and scientific applications. This growing interest in the application of natural dyes is geared mainly towards the need of developing green novel hybrid photonics. Indeed, several reports [Rek-2009, Bal-2011] have demonstrated that some ...
... be used as optical materials for industrial and scientific applications. This growing interest in the application of natural dyes is geared mainly towards the need of developing green novel hybrid photonics. Indeed, several reports [Rek-2009, Bal-2011] have demonstrated that some ...
Significant decrease of the lattice thermal conductivity due to phonon
... reaches 106 W/cm3. The second factor is a rebirth of the field of thermoelectric materials, which has been brought about by the emergence of large numbers of new artificially synthesized materials, including those structured on an atomic scale.2 In order to dissipate the increasing amount of heat fr ...
... reaches 106 W/cm3. The second factor is a rebirth of the field of thermoelectric materials, which has been brought about by the emergence of large numbers of new artificially synthesized materials, including those structured on an atomic scale.2 In order to dissipate the increasing amount of heat fr ...
Displays - La Salle University
... interact with the charged electrons and protons making up the material. • This can result in reflection or absorption or transmission. • What if the material has a different behaviors in different directions? CSIT 301 (Blum) ...
... interact with the charged electrons and protons making up the material. • This can result in reflection or absorption or transmission. • What if the material has a different behaviors in different directions? CSIT 301 (Blum) ...
Full-Text PDF
... of a particle approaches one. We must also stress that the logarithmic axis for q is essential as well as q itself because so much of our world progresses geometrically rather than arithmetically. We call this procedure of plotting scattered intensity versus q double logarithmically “Q-space analysi ...
... of a particle approaches one. We must also stress that the logarithmic axis for q is essential as well as q itself because so much of our world progresses geometrically rather than arithmetically. We call this procedure of plotting scattered intensity versus q double logarithmically “Q-space analysi ...
Photonic Crystal Fibers
... Periodically distributed air cores can form an artificial 2D photonic crystal structure with lattice constant similar to the wavelength of light. In the 2D crystal structures photonic bandgaps exist that prevent propagation of light with a certain range of frequencies. If periodicity of the structur ...
... Periodically distributed air cores can form an artificial 2D photonic crystal structure with lattice constant similar to the wavelength of light. In the 2D crystal structures photonic bandgaps exist that prevent propagation of light with a certain range of frequencies. If periodicity of the structur ...
L6-Imperfections
... When metals are plastically deformed, some fraction of the deformation energy (~ 5%) is retained internally; the remainder is dissipated as heat. The major portion of this stored energy is as strain energy associated with dislocations. There are regions in which compressive, tensile, and shear latti ...
... When metals are plastically deformed, some fraction of the deformation energy (~ 5%) is retained internally; the remainder is dissipated as heat. The major portion of this stored energy is as strain energy associated with dislocations. There are regions in which compressive, tensile, and shear latti ...
Monitors - La Salle University
... interact with the charged electrons and protons making up the material. • This can result in reflection or absorption or transmission. • What if the material has a different behaviors in different directions? CSC 370 (Blum) ...
... interact with the charged electrons and protons making up the material. • This can result in reflection or absorption or transmission. • What if the material has a different behaviors in different directions? CSC 370 (Blum) ...
Light Scattering in Holographic Polymer Dispersed Liquid Crystals
... bipolar. The configuration that is formed is dependent on the size of the droplet, the anchoring energy at the interface, and the free energy of the liquid crystal deformations. ............................................................................................................ 15 ...
... bipolar. The configuration that is formed is dependent on the size of the droplet, the anchoring energy at the interface, and the free energy of the liquid crystal deformations. ............................................................................................................ 15 ...
Materials for Optical Systems
... are commonly used at the front end of an optical system to protect and seal the critical components of an optical assembly from adverse environmental effects such as dirt, dust, and humidity. Usually, optical windows are plane-parallel plates of optical quality glass, but sometimes a small wedge ma ...
... are commonly used at the front end of an optical system to protect and seal the critical components of an optical assembly from adverse environmental effects such as dirt, dust, and humidity. Usually, optical windows are plane-parallel plates of optical quality glass, but sometimes a small wedge ma ...
Transparency and translucency
In the field of optics, transparency (also called pellucidity or diaphaneity) is the physical property of allowing light to pass through the material without being scattered. On a macroscopic scale (one where the dimensions investigated are much, much larger than the wavelength of the photons in question), the photons can be said to follow Snell's Law. Translucency (also called translucence or translucidity) is a super-set of transparency: it allows light to pass through, but does not necessarily (again, on the macroscopic scale) follow Snell's law; the photons can be scattered at either of the two interfaces where there is a change in index of refraction, or internally. In other words, a translucent medium allows the transport of light while a transparent medium not only allows the transport of light but allows for image formation. The opposite property of translucency is opacity. Transparent materials appear clear, with the overall appearance of one color, or any combination leading up to a brilliant spectrum of every color.When light encounters a material, it can interact with it in several different ways. These interactions depend on the wavelength of the light and the nature of the material. Photons interact with an object by some combination of reflection, absorption and transmission.Some materials, such as plate glass and clean water, transmit much of the light that falls on them and reflect little of it; such materials are called optically transparent. Many liquids and aqueous solutions are highly transparent. Absence of structural defects (voids, cracks, etc.) and molecular structure of most liquids are mostly responsible for excellent optical transmission.Materials which do not transmit light are called opaque. Many such substances have a chemical composition which includes what are referred to as absorption centers. Many substances are selective in their absorption of white light frequencies. They absorb certain portions of the visible spectrum while reflecting others. The frequencies of the spectrum which are not absorbed are either reflected back or transmitted for our physical observation. This is what gives rise to color. The attenuation of light of all frequencies and wavelengths is due to the combined mechanisms of absorption and scattering.Transparency can provide almost perfect camouflage for animals able to achieve it. This is easier in dimly-lit or turbid seawater than in good illumination. Many marine animals such as jellyfish are highly transparent.