IOSR Journal of Applied Physics (IOSR-JAP)
... Physics Department, Faculty of Science, Zagazig University, Egypt ...
... Physics Department, Faculty of Science, Zagazig University, Egypt ...
Optical Properties of Solids
... Refraction causes the light waves to propagate with a smaller velocity than in free space. This reduction of the velocity leads to the bending of light rays at interfaces desclibed by Snell's law of refraction. Refraction, in itself, does not affect the intensity of the light wave as it propagates. ...
... Refraction causes the light waves to propagate with a smaller velocity than in free space. This reduction of the velocity leads to the bending of light rays at interfaces desclibed by Snell's law of refraction. Refraction, in itself, does not affect the intensity of the light wave as it propagates. ...
Second Harmonic Generation Technique and its Applications
... to the excited state of unperturbed system a resonance will occur in SHG and the NLO susceptibility, describing it, is complex. Although the frequency doubling was observed earlier in electrical circuits with low frequency fields, the first observation of the optical frequency conversion was done in ...
... to the excited state of unperturbed system a resonance will occur in SHG and the NLO susceptibility, describing it, is complex. Although the frequency doubling was observed earlier in electrical circuits with low frequency fields, the first observation of the optical frequency conversion was done in ...
Sodium: A Charge-Transfer Insulator at High Pressures
... excitonic peaks. This is a sign of highly correlated excitonic states. Anisotropy and inhomogeneity.—By comparing the optical spectra obtained with light polarized either along the hexagonal c axis or in the perpendicular ab plane [Fig. 2(a)], we find that the spectra with the two light polarization ...
... excitonic peaks. This is a sign of highly correlated excitonic states. Anisotropy and inhomogeneity.—By comparing the optical spectra obtained with light polarized either along the hexagonal c axis or in the perpendicular ab plane [Fig. 2(a)], we find that the spectra with the two light polarization ...
Preview of “ZEISS Microscopy Online ...Aperture and Resolution”
... electromagnetic waves, the period lengths of which range between 400 and 700 nanometers. As a reference, it is important to know that 1 millimeter equals 1000 micrometers and 1 micrometer equals 1000 nanometers. Light of green color has a wavelength range center ...
... electromagnetic waves, the period lengths of which range between 400 and 700 nanometers. As a reference, it is important to know that 1 millimeter equals 1000 micrometers and 1 micrometer equals 1000 nanometers. Light of green color has a wavelength range center ...
Skylights
... doubling the WF will directly double the SE. For a cube-shaped light well, cutting the reflectance of the surfaces in half (by changing the paint color from white to goldenrod, for example), will also reduce the SE by half. ...
... doubling the WF will directly double the SE. For a cube-shaped light well, cutting the reflectance of the surfaces in half (by changing the paint color from white to goldenrod, for example), will also reduce the SE by half. ...
Visualization of modification of electric and magnetic dipole emission
... The effects of the local environment on spontaneous emission are commonly discussed in terms of the Purcell effect [1] accounting for a modification of the photonic mode density and a subsequent alteration of the dipole emission rate [2-5]. Depending on the degree of modification of electric and mag ...
... The effects of the local environment on spontaneous emission are commonly discussed in terms of the Purcell effect [1] accounting for a modification of the photonic mode density and a subsequent alteration of the dipole emission rate [2-5]. Depending on the degree of modification of electric and mag ...
Schlieren Visualization
... under the field of view so that the wick is barely visible at the bottom of the frame. Again, you may need to prop the sterno up using boxes or anything else that is handy. Do not leave the flame burning but only light it when actively recording images/movies; we want the sterno to last through mult ...
... under the field of view so that the wick is barely visible at the bottom of the frame. Again, you may need to prop the sterno up using boxes or anything else that is handy. Do not leave the flame burning but only light it when actively recording images/movies; we want the sterno to last through mult ...
Full-Text PDF
... 658 nm, the Cr/Au and Ti/Au films exhibit low-sensitivity with large full width at half maximum (FWHM) values of approximately 3°[9–11]. However, these conventional SPR sensors (Cr/Au) can cause problems in the adhesion layer, such as metal interdiffusion, low optical transmission, large FWHM, and a ...
... 658 nm, the Cr/Au and Ti/Au films exhibit low-sensitivity with large full width at half maximum (FWHM) values of approximately 3°[9–11]. However, these conventional SPR sensors (Cr/Au) can cause problems in the adhesion layer, such as metal interdiffusion, low optical transmission, large FWHM, and a ...
Chapter 8
... Less expensive, but sensitive to wavelength, incident angle and temperature. d d. d ...
... Less expensive, but sensitive to wavelength, incident angle and temperature. d d. d ...
... Bandwidth: Measure of the information-carrying capacity of an optical fiber Wavelength: The distance between two successive points of an electromagnetic waveform, usually measured in nanometers (nm). 7. What is total internal reflection? The reflection that occurs when light, in a higher refractive- ...
The Laws of Reflection
... • Note that any two rays with a point in common (such as the point of incidence) always exist on the same plane. Two such rays can actually be used to define a plane, so it is not significant that the incident and reflected ray lie on the same plane. The fact that a third line, the normal, also lies ...
... • Note that any two rays with a point in common (such as the point of incidence) always exist on the same plane. Two such rays can actually be used to define a plane, so it is not significant that the incident and reflected ray lie on the same plane. The fact that a third line, the normal, also lies ...
Diffraction
... In addition to the diffraction at a slit, in this experiment, the diffraction grating is also observed. The diffraction grating is a generalization of the diffraction at a double slit, which is an experiment with extreme importance in physics because of the transition from classical physics to quant ...
... In addition to the diffraction at a slit, in this experiment, the diffraction grating is also observed. The diffraction grating is a generalization of the diffraction at a double slit, which is an experiment with extreme importance in physics because of the transition from classical physics to quant ...
Electroholographic tunable volume grating in the g44
... As can be seen two diffraction gratings are formed along the x axis: (i) a constant (i.e., independent of Eo) grating with a 2K grating vector induced by the diagonal terms, and (ii) an electroholographic grating induced by the off-diagonal term with a grating vector K and an amplitude ␦共⌬n兲 = no3g4 ...
... As can be seen two diffraction gratings are formed along the x axis: (i) a constant (i.e., independent of Eo) grating with a 2K grating vector induced by the diagonal terms, and (ii) an electroholographic grating induced by the off-diagonal term with a grating vector K and an amplitude ␦共⌬n兲 = no3g4 ...
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... The experimental setup has been discussed in detail (9) and is briefly described here. We modulate a 780-nm output of a 5-mW laser diode at 200 MHz. Photons from the source are guided through a 6.0-mm-diameter fiber optic cable into a 60-liter tank containing a turbid medium called Intralipid.§ The ...
... The experimental setup has been discussed in detail (9) and is briefly described here. We modulate a 780-nm output of a 5-mW laser diode at 200 MHz. Photons from the source are guided through a 6.0-mm-diameter fiber optic cable into a 60-liter tank containing a turbid medium called Intralipid.§ The ...
Fluidic Optics - Whitesides Group
... (ICG) and the illuminated guide (IIG). (Insets) Shown are optical micrographs of the cross section of the output of the microfluidic channels viewed through the transparent window. (C) (i) Plot of the profile of the intensity of light output as a function of distance from the center of the channel. ...
... (ICG) and the illuminated guide (IIG). (Insets) Shown are optical micrographs of the cross section of the output of the microfluidic channels viewed through the transparent window. (C) (i) Plot of the profile of the intensity of light output as a function of distance from the center of the channel. ...
Surface plasmon resonance microscopy
Surface Plasmon Resonance Microscopy (SPRM) is a label free analytical tool that combines the surface plasmon resonance of metallic surfaces with imaging of the metallic surface.The heterogeneity of the refractive index of the metallic surface imparts high contrast images, caused by the shift in the resonance angle.SPRM can achieve a thickness sensitivity of few tenths of nanometer and lateral resolution achieves values of micrometer scale.SPRM is used to characterize surfaces, self-assembled monolayers, multilayer films, metal nanoparticles, oligonucleotides arrays, binding and reduction reactions.Surface Plasmon polaritons are surface electromagnetic waves coupled to oscillating free electrons of a metallic surface that propagate along a metal/dielectric interface.Since polaritons are highly sensitive to small changes in the refractive index of the metallic material,it can be used as a biosensing tool that does not require labeling. SPRM measurements can be made in real-time.Wang and collaborators studied the binding kinetics of membrane proteins in single cells.The experimental setup of an SPRM can be seen in the Figure 1, where an adherent cell is grown on a gold film and placed in an inverted microscope, p-polarized light was used to create the surface plasmons on the gold film and a CCD camera was used to create the SPR image.