(full text)
... shown in (a) and (b) respectively, and the total x-ray spectrum for the region that was imaged is shown in (d). The darker areas represent the copper or the aluminum. The image created with secondary electrons is shown in (c). All three images cover the same area and are only displayed at different ...
... shown in (a) and (b) respectively, and the total x-ray spectrum for the region that was imaged is shown in (d). The darker areas represent the copper or the aluminum. The image created with secondary electrons is shown in (c). All three images cover the same area and are only displayed at different ...
Observation of subluminal twisted light in vacuum
... experimental conditions, such as Bessel beams and evanescent waves, have been studied for their exotic group velocities in vacuum (9-10). A recent publication has also reported slow-light effects in vacuum (11) for both Gaussian and Bessel-like beams. The work demonstrated light delays as large as ~ ...
... experimental conditions, such as Bessel beams and evanescent waves, have been studied for their exotic group velocities in vacuum (9-10). A recent publication has also reported slow-light effects in vacuum (11) for both Gaussian and Bessel-like beams. The work demonstrated light delays as large as ~ ...
10.2 Fourier Transform Infrared Spectroscopy
... To obtain an infrared spectrum via a Fourier transform, the signal would be recorded (digitized) as a function of time to obtain F(t). Then the spectrum would be computed using the following expression, ...
... To obtain an infrared spectrum via a Fourier transform, the signal would be recorded (digitized) as a function of time to obtain F(t). Then the spectrum would be computed using the following expression, ...
PDF
... tectable in the unheated film,though substantial zero angle scattering is evident. This intense zero angle scattering has been observed in many ionomer samples with no agreement as to its origin. From the changes in the zero angle scattering observed in these experiments as a function of temperature ...
... tectable in the unheated film,though substantial zero angle scattering is evident. This intense zero angle scattering has been observed in many ionomer samples with no agreement as to its origin. From the changes in the zero angle scattering observed in these experiments as a function of temperature ...
Polarimetric imaging of crystals - Werner Kaminsky
... HAUP technique to heterogeneous crystals, the polarimeter was fitted with a translation stage in order to produce topographs of the optical parameters. In this way, maps were made comprising 100 6 100 pixels at a resolution of about 30 mm per pixel. In the Fourier analysis of the intensity data, the ...
... HAUP technique to heterogeneous crystals, the polarimeter was fitted with a translation stage in order to produce topographs of the optical parameters. In this way, maps were made comprising 100 6 100 pixels at a resolution of about 30 mm per pixel. In the Fourier analysis of the intensity data, the ...
Scanning Electron Microscopy Primer - CharFac
... resolution but it comes at a cost. The stronger condenser lens setting in B causes more of the beam to be stopped by the objective aperture and thus a reduction in probe current occurs. Beam current increases to the 8/3 power as probe diameter increases. Adequate current is essential to produce imag ...
... resolution but it comes at a cost. The stronger condenser lens setting in B causes more of the beam to be stopped by the objective aperture and thus a reduction in probe current occurs. Beam current increases to the 8/3 power as probe diameter increases. Adequate current is essential to produce imag ...
materials Volume Holograms in Photopolymers: Comparison between Analytical and Rigorous Theories
... Photopolymers are useful for different applications due to the refractive index variations and relief profiles generated [1–8]. There are many types of photopolymers that may be differentiated by the type of binder, since this component determines to a great extent the choice of monomer, dye and ini ...
... Photopolymers are useful for different applications due to the refractive index variations and relief profiles generated [1–8]. There are many types of photopolymers that may be differentiated by the type of binder, since this component determines to a great extent the choice of monomer, dye and ini ...
Three-dimensional imaging by optical sectioning in the aberration
... The motivation behind three-dimensional imaging in the electron microscope is to fully understand the three-dimensional structure of materials that determines their chemical, physical and electronic properties. At present, the most common technique for three-dimensional imaging is electron tomograph ...
... The motivation behind three-dimensional imaging in the electron microscope is to fully understand the three-dimensional structure of materials that determines their chemical, physical and electronic properties. At present, the most common technique for three-dimensional imaging is electron tomograph ...
Nondiffracting Light Beams for Long Ranges
... 5 Application of LRNB optical system to imaging We have described about LRNB generation by light beam transmission showing some examples of generated LRNBs by an optical system, up to the 3rd section. The optical system is a Galilean telescope with an eyepiece that has a spherical aberration. If we ...
... 5 Application of LRNB optical system to imaging We have described about LRNB generation by light beam transmission showing some examples of generated LRNBs by an optical system, up to the 3rd section. The optical system is a Galilean telescope with an eyepiece that has a spherical aberration. If we ...
Photonic crystal cavities in silicon dioxide
... in the near infrared regime, and is heavily used for telecommunication purposes near the wavelength of 1.5 m. However, silicon absorbs heavily in the visible wavelength range, and would be difficult to employ in light emitting and waveguiding devices at the visible wavelengths. Silicon dioxide 共SiO ...
... in the near infrared regime, and is heavily used for telecommunication purposes near the wavelength of 1.5 m. However, silicon absorbs heavily in the visible wavelength range, and would be difficult to employ in light emitting and waveguiding devices at the visible wavelengths. Silicon dioxide 共SiO ...
Conroy2005-SurfaceMetrology.pdf
... vertical direction. Phase shifting interferometry is also often used to measure similar samples of this type, Figure 4 White light interferometer measurement however the wavelength of the light would need to be at least 750 nm in order to get reliable data. One common problem with optical systems is ...
... vertical direction. Phase shifting interferometry is also often used to measure similar samples of this type, Figure 4 White light interferometer measurement however the wavelength of the light would need to be at least 750 nm in order to get reliable data. One common problem with optical systems is ...
The generation of nondiffracting beams using
... two coherent fields: a reference wavefield and a signal wavefield of the same wavelength that contains information on the object of interest.4 For this reason, a hologram is sometimes referred to as an interferogram. A setup for making holograms usually involves the splitting of a laser beam to obta ...
... two coherent fields: a reference wavefield and a signal wavefield of the same wavelength that contains information on the object of interest.4 For this reason, a hologram is sometimes referred to as an interferogram. A setup for making holograms usually involves the splitting of a laser beam to obta ...
Holography
... The fundamental difference between a transmission hologram and a reflection hologram lies in the direction of the interference fringes that are recored inside the photosensitive emulsion. In a transmission hologram, as shown in Fig. 4 (a), the reference wave and object wave entering the emulsion fro ...
... The fundamental difference between a transmission hologram and a reflection hologram lies in the direction of the interference fringes that are recored inside the photosensitive emulsion. In a transmission hologram, as shown in Fig. 4 (a), the reference wave and object wave entering the emulsion fro ...
Nonlinear Optical Effects in Photonic Crystals Abstract
... Photonic crystals (PhCs) are expected to play an important role in the development of new optical devices. The devices possibilities for PhCs will be greatly enhanced by the addition of optical nonlinearities; such possibilities include ultra-fast all-optical switching for communications, and poten ...
... Photonic crystals (PhCs) are expected to play an important role in the development of new optical devices. The devices possibilities for PhCs will be greatly enhanced by the addition of optical nonlinearities; such possibilities include ultra-fast all-optical switching for communications, and poten ...
diffraction uniformly illuminated circular aperture
... UNIFORMLY ILLUMINATED CIRCULAR APERTURE If a small hole in an opaque screen is placed between a light source and an observation screen then the shadow of the hole does not have a sharp outline as predicted by geometrical optics. On close examination of the shadow on the observation screen, a set of ...
... UNIFORMLY ILLUMINATED CIRCULAR APERTURE If a small hole in an opaque screen is placed between a light source and an observation screen then the shadow of the hole does not have a sharp outline as predicted by geometrical optics. On close examination of the shadow on the observation screen, a set of ...
Beam Dynamics in PT Symmetric Optical Lattices
... ing and as a result the spectrum is partially complex. This happens in spite of the fact that V V is still satisfied. For the particular potential considered here we find that V0th 0:5. More specifically, for V0 < 0:5, the band structure is entirely real while for V0 > 0:5 it becomes c ...
... ing and as a result the spectrum is partially complex. This happens in spite of the fact that V V is still satisfied. For the particular potential considered here we find that V0th 0:5. More specifically, for V0 < 0:5, the band structure is entirely real while for V0 > 0:5 it becomes c ...
First Order Optics
... which all rays parallel to the optical axis in object space will come to focus in image space. The same is true for rays traveling from image space towards object space. The nodal planes are the planes of unit angular magnification. A ray which passes through the front nodal point will pass through ...
... which all rays parallel to the optical axis in object space will come to focus in image space. The same is true for rays traveling from image space towards object space. The nodal planes are the planes of unit angular magnification. A ray which passes through the front nodal point will pass through ...
Visible Light, Wide-Angle Graded Metasurface for Back Reflection
... funneled toward the first order in the back direction. The ultrathin profile of the designed surface provides an ideal platform for microwave or terahertz graphene-based metasurfaces, which are inherently deeply subwavelength. Here, we chose to realize the device characterized in Figure 2A using a nan ...
... funneled toward the first order in the back direction. The ultrathin profile of the designed surface provides an ideal platform for microwave or terahertz graphene-based metasurfaces, which are inherently deeply subwavelength. Here, we chose to realize the device characterized in Figure 2A using a nan ...
Julie Cass - Stanford University
... Owing to the chromatic aberrations, the "focal length" specified for the lens is no longer the point of smallest beam radius. Instead, we defined a new adjusted focal length as the point at where the tightest beam waist is located. Through use of the Merit Function Editor in ZEMAX, system parameter ...
... Owing to the chromatic aberrations, the "focal length" specified for the lens is no longer the point of smallest beam radius. Instead, we defined a new adjusted focal length as the point at where the tightest beam waist is located. Through use of the Merit Function Editor in ZEMAX, system parameter ...
Laboratory Experiment
... points on the trace. These measurements will be used to calculate the radius r of the beam. Measure and record your distance of z. 3. Now shine the laser beam against a far wall and calculate the far-field divergence angle. [Note: Measure the beam "diameter" of the visible spot you can easily see. T ...
... points on the trace. These measurements will be used to calculate the radius r of the beam. Measure and record your distance of z. 3. Now shine the laser beam against a far wall and calculate the far-field divergence angle. [Note: Measure the beam "diameter" of the visible spot you can easily see. T ...
Gaussian Beams
... points on the trace. These measurements will be used to calculate the radius r of the beam. Measure and record your distance of z. 3. Now shine the laser beam against a far wall and calculate the far-field divergence angle. [Note: Measure the beam "diameter" of the visible spot you can easily see. T ...
... points on the trace. These measurements will be used to calculate the radius r of the beam. Measure and record your distance of z. 3. Now shine the laser beam against a far wall and calculate the far-field divergence angle. [Note: Measure the beam "diameter" of the visible spot you can easily see. T ...
Optical Coherence Tomography
... In other words A is the amplitude spectrum of the front interface reflection, B is the amplitude spectrum of the rear interface reflection, and C is the phase difference between these two amplitudes. Note only the phase difference between the two interface signals are used for the calculation. These ...
... In other words A is the amplitude spectrum of the front interface reflection, B is the amplitude spectrum of the rear interface reflection, and C is the phase difference between these two amplitudes. Note only the phase difference between the two interface signals are used for the calculation. These ...
Linköping University Post Print Optical properties of carbon nanofiber photonic crystals
... of the band structure of the CNF-PC using ellipsometry. The measurements are in good agreement with finite-difference time domain [5] band structure calculations using a refractive index of nCN F = 4.1 for the CNF. It is also shown that the symmetry directions of the samples can be easily detected. ...
... of the band structure of the CNF-PC using ellipsometry. The measurements are in good agreement with finite-difference time domain [5] band structure calculations using a refractive index of nCN F = 4.1 for the CNF. It is also shown that the symmetry directions of the samples can be easily detected. ...
Chapter 2: Propagation of Laser Beams
... Chapter 2 Propagation of Laser Beams Lecture 1 Gaussian laser beams 2.1 Scalar wave equation Lasers are coherent electromagnetic waves. Control of laser beams is a main topic of this course. Laser beams usually have a concentrated profile in the transverse direction, which diverges slowly when propa ...
... Chapter 2 Propagation of Laser Beams Lecture 1 Gaussian laser beams 2.1 Scalar wave equation Lasers are coherent electromagnetic waves. Control of laser beams is a main topic of this course. Laser beams usually have a concentrated profile in the transverse direction, which diverges slowly when propa ...