Week 9 Wed. (Lesson 15) Coherence and Optical Tomography
... • Two waves coherent if fixed phase relationship between them for some period of time ...
... • Two waves coherent if fixed phase relationship between them for some period of time ...
High‐transmission dielectric metasurface with 2π phase control at
... magnetic permeability [19,28,29]. Additionally, it was theoretically predicted [33] and experimentally demonstrated [34, 35] that at particular wavelengths such particles may possess strong directional forward scattering with almost zero backscattering. This effect appears when the electric and magn ...
... magnetic permeability [19,28,29]. Additionally, it was theoretically predicted [33] and experimentally demonstrated [34, 35] that at particular wavelengths such particles may possess strong directional forward scattering with almost zero backscattering. This effect appears when the electric and magn ...
Acceleration of ultracold atoms: towards a measurement of
... leading to an accurate determination of the fine structure constant α. It consists in measuring the momentum transferred to an atom by a Raman transition involving only one hyperfine level, the measurement accuracy being then proportional to the number of transitions. Two different geometries can be ...
... leading to an accurate determination of the fine structure constant α. It consists in measuring the momentum transferred to an atom by a Raman transition involving only one hyperfine level, the measurement accuracy being then proportional to the number of transitions. Two different geometries can be ...
Unwrapping Hartman-Shack Images from Highly Aberrated Eyes
... To extend the dynamic range of HartmanShack wavefront sensor using B-spline based extrapolation • The results: The dynamic range of a typical HS sensor increases 3.5 to 13 times compared with a simple unwrapping algorithm ...
... To extend the dynamic range of HartmanShack wavefront sensor using B-spline based extrapolation • The results: The dynamic range of a typical HS sensor increases 3.5 to 13 times compared with a simple unwrapping algorithm ...
1 Introduction - BYU Physics and Astronomy
... The two surfaces show significant differences in reflectivity, presumably owing to their different oxide layer thicknesses. The prototype work determined that the grazing incidence tungsten-coated grating reflects very nearly equal percentages ...
... The two surfaces show significant differences in reflectivity, presumably owing to their different oxide layer thicknesses. The prototype work determined that the grazing incidence tungsten-coated grating reflects very nearly equal percentages ...
Applications(2)
... Surface plasmon resonance sensors based on optical fibers • Optical fiber SPR probes present the highest level of miniaturization of SPR devices, allowing for chemical and biological sensing in inaccessible locations. The ability to transmit optical signals over a long distance makes the use of opt ...
... Surface plasmon resonance sensors based on optical fibers • Optical fiber SPR probes present the highest level of miniaturization of SPR devices, allowing for chemical and biological sensing in inaccessible locations. The ability to transmit optical signals over a long distance makes the use of opt ...
Imaging scanning tunneling microscope
... field amplitudes decaying exponentially in the neighboring media. They propagate in extended one-dimensional and two-dimensional structures7 and can exist within and couple between single nano-scale metal particles,8 enabling manipulation of ‘‘light’’ at the nano-scale. In conjunction with recent de ...
... field amplitudes decaying exponentially in the neighboring media. They propagate in extended one-dimensional and two-dimensional structures7 and can exist within and couple between single nano-scale metal particles,8 enabling manipulation of ‘‘light’’ at the nano-scale. In conjunction with recent de ...
Lab 7: Fabry-Perot Interferometer
... of the emerging beams. For example, N = 1 defines a where F = (1−R)2 and R = r . beam that travels right through the two glass plates and N = 2 defines a beam that is transmitted after As you can see from figure 1 the last beam travels much further than the first. If the separation of the being refl ...
... of the emerging beams. For example, N = 1 defines a where F = (1−R)2 and R = r . beam that travels right through the two glass plates and N = 2 defines a beam that is transmitted after As you can see from figure 1 the last beam travels much further than the first. If the separation of the being refl ...
Three-dimensional imaging by optical sectioning in the aberration
... 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 tomography (Midgley & Weyland 2003), and while the volume resolution of this technique ...
... 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 tomography (Midgley & Weyland 2003), and while the volume resolution of this technique ...
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Sample pages 1 PDF
... 10−6 = 1.25 × 10−28 N s per photon, not of any great significance until one considers the avalanche of photons possible with the laser. The energy of a photon from a CO2 laser is given as 1.85×10−20 J in Table 2.1, where it is compared with the energy of photons from other optical generators. Thus, i ...
... 10−6 = 1.25 × 10−28 N s per photon, not of any great significance until one considers the avalanche of photons possible with the laser. The energy of a photon from a CO2 laser is given as 1.85×10−20 J in Table 2.1, where it is compared with the energy of photons from other optical generators. Thus, i ...
Observation of Collective Friction Forces due to Spatial Self
... may improve as the atom number increases. From the point of view of optical gain, spatial ordering of two-level atoms has been invoked to explain apparently inversionless gain mechanisms, as in recoil-induced resonances and the collective atomic recoil laser [2 –8]. Inside an optical resonator, ‘‘se ...
... may improve as the atom number increases. From the point of view of optical gain, spatial ordering of two-level atoms has been invoked to explain apparently inversionless gain mechanisms, as in recoil-induced resonances and the collective atomic recoil laser [2 –8]. Inside an optical resonator, ‘‘se ...
Holography
... The problem Dennis Gabor, the inventor of holography, set out to solve was how to take a picture of all the light passing through a large window, rather than just the light passing through one tiny pinhole. The person looking through this captured "window" would see the image in 3D by virtue of each ...
... The problem Dennis Gabor, the inventor of holography, set out to solve was how to take a picture of all the light passing through a large window, rather than just the light passing through one tiny pinhole. The person looking through this captured "window" would see the image in 3D by virtue of each ...
tuning of material optical properties by modification of interlayer
... time domain) [21-23] and FDFD (finite difference frequency domain) [24]. Both of mentioned methods have their advantages and disadvantages. Unfortunately, both are time and resource consuming because of used FFT algorithms. In this work we used the so-called matrix method, which has the advantage of ...
... time domain) [21-23] and FDFD (finite difference frequency domain) [24]. Both of mentioned methods have their advantages and disadvantages. Unfortunately, both are time and resource consuming because of used FFT algorithms. In this work we used the so-called matrix method, which has the advantage of ...
5 mm thick periodically poled Rb-doped KTP for high
... using the electric field poling technique. Due to the noncritical interaction in QPM media the parametric gain scales simply as a square of the crystal length, so that the relative differences in effective nonlinearities in different QPM materials can be easily compensated for by choosing an appropr ...
... using the electric field poling technique. Due to the noncritical interaction in QPM media the parametric gain scales simply as a square of the crystal length, so that the relative differences in effective nonlinearities in different QPM materials can be easily compensated for by choosing an appropr ...
Rapid fabrication of 3D terahertz split ring resonator arrays by novel
... utilizing 780 nm light from a Coherent RegA Ti:Sapphire oscillator laser system utilizing an 80 MHz rep rate with 160 fs pulses. Continuous wave 532 nm exposure was performed with a Coherent Verdi-V5 laser. Power was controlled by a neutral density filter and measured with a power meter (Newport 81 ...
... utilizing 780 nm light from a Coherent RegA Ti:Sapphire oscillator laser system utilizing an 80 MHz rep rate with 160 fs pulses. Continuous wave 532 nm exposure was performed with a Coherent Verdi-V5 laser. Power was controlled by a neutral density filter and measured with a power meter (Newport 81 ...
Observation of subluminal twisted light in vacuum: comment
... exhibit subluminal group velocities in vacuum, being 0.1% slower relative to c in the focal region. Such a substantial subluminality effect is intriguing, since it has been known for a long time that fundamental (zeroth-order) Gaussian beam pulses exhibit a slight superluminality, i.e., they propaga ...
... exhibit subluminal group velocities in vacuum, being 0.1% slower relative to c in the focal region. Such a substantial subluminality effect is intriguing, since it has been known for a long time that fundamental (zeroth-order) Gaussian beam pulses exhibit a slight superluminality, i.e., they propaga ...
measurement of three-dimensional temperature fields
... linear. two wavefronts, C:, and C’<:.can be recorded sequentially in time on a single hologram. In the experiments described in this paper. C,, is an optical wavefront which has passed through an isothermal fluid, and C;: is an initially identical wavefront which has passed through the same fluid af ...
... linear. two wavefronts, C:, and C’<:.can be recorded sequentially in time on a single hologram. In the experiments described in this paper. C,, is an optical wavefront which has passed through an isothermal fluid, and C;: is an initially identical wavefront which has passed through the same fluid af ...
Alkali-metal atoms in laser fields: optical pumping, coherent
... was adopted and developed by O. Stern, which led to the classical Stern-Gerlach experiments carried out during 1920–1923 [10–14]. These experiments proved spatial quantization experimentally, demonstrated that silver atoms have an intrinsic angular momentum, and determined a value for the Bohr magne ...
... was adopted and developed by O. Stern, which led to the classical Stern-Gerlach experiments carried out during 1920–1923 [10–14]. These experiments proved spatial quantization experimentally, demonstrated that silver atoms have an intrinsic angular momentum, and determined a value for the Bohr magne ...
Optical tweezers
Optical tweezers (originally called ""single-beam gradient force trap"") are scientific instruments that use a highly focused laser beam to provide an attractive or repulsive force (typically on the order of piconewtons), depending on the refractive index mismatch to physically hold and move microscopic dielectric objects similar to tweezers. Optical tweezers have been particularly successful in studying a variety of biological systems in recent years.