I. Results from Prior NSF Support
... We have devised an interferometer configuration with several significant advantages over the one used to measure the recoil velocity and thereby h/m in Cs. This new interferometer offers relative freedom from vibration as well as a phase which grows quadratically with the number of momenta transferr ...
... We have devised an interferometer configuration with several significant advantages over the one used to measure the recoil velocity and thereby h/m in Cs. This new interferometer offers relative freedom from vibration as well as a phase which grows quadratically with the number of momenta transferr ...
NicholasBarbutoPoster - Physics
... A photonic crystal is the optical analog to semiconductors in electronics. Semiconductors control the flow of electrons by creating energy bands where electrons are not able to flow, usually referred to as the band gap. This stems from the periodic nature of the atoms or molecules in a crystal latti ...
... A photonic crystal is the optical analog to semiconductors in electronics. Semiconductors control the flow of electrons by creating energy bands where electrons are not able to flow, usually referred to as the band gap. This stems from the periodic nature of the atoms or molecules in a crystal latti ...
A study of laser-induced self
... Verification of standard flexural and torsional modes in the vibration spectrum by imaging the mode shapes and comparing them with the model based expected pattern Mode Coupling due to geometrical and mass asymmetries account for a number of resonances Large strain values leads to non-linear m ...
... Verification of standard flexural and torsional modes in the vibration spectrum by imaging the mode shapes and comparing them with the model based expected pattern Mode Coupling due to geometrical and mass asymmetries account for a number of resonances Large strain values leads to non-linear m ...
Module 27: Polarization-II Lecture 27: Polarization-II
... no when E is perpendicular to the x axis. Here the x axis is referred to as the optic axis. The optical properties are the same in all directions perpendicular ~ is along the optic axis. Crystals may to the optic axis and it is different if E have more than one optic axis. Here we only consider a si ...
... no when E is perpendicular to the x axis. Here the x axis is referred to as the optic axis. The optical properties are the same in all directions perpendicular ~ is along the optic axis. Crystals may to the optic axis and it is different if E have more than one optic axis. Here we only consider a si ...
Polarization of light II
... This fact can be used to get a polarised beam of light from an unpolarised beam. An unpolarised beam is made to incident at an interface at Brewster angle. The reflected beam will contain the s component only. In this experiment , you will study the variation of intensity as a function of angle of ...
... This fact can be used to get a polarised beam of light from an unpolarised beam. An unpolarised beam is made to incident at an interface at Brewster angle. The reflected beam will contain the s component only. In this experiment , you will study the variation of intensity as a function of angle of ...
Introduction to Diffraction Grating
... of thumb, the first order efficiency of a grating decreases by 50% at 0.66λB and 1.5λB, where λB is the blaze wavelength. Note: No grating can diffract a wavelength that is greater than 2 times the groove period. Stray Light: For applications such as Raman spectroscopy, where signal-to-noise is crit ...
... of thumb, the first order efficiency of a grating decreases by 50% at 0.66λB and 1.5λB, where λB is the blaze wavelength. Note: No grating can diffract a wavelength that is greater than 2 times the groove period. Stray Light: For applications such as Raman spectroscopy, where signal-to-noise is crit ...
Diffraction-managed superlensing using metallodielectric heterostructures
... wave of amplitude H0 and in-plane spatial frequency kx impinges on the front face of the first superlens, the wave field is partially transmitted with a complex amplitude t1 H0 ; therefore t1 stands for the coefficient of transmission. In the case that absorption and reflections are negligible, |t1 | ≈ 1 ...
... wave of amplitude H0 and in-plane spatial frequency kx impinges on the front face of the first superlens, the wave field is partially transmitted with a complex amplitude t1 H0 ; therefore t1 stands for the coefficient of transmission. In the case that absorption and reflections are negligible, |t1 | ≈ 1 ...
Nonconfocal Differential Interferometry Sensing Scheme for
... of the cantilever consists of using optical interferometry,1–6) capacitance,7,8) point-contact current-imaging,9) beam deflection,10–14) and magnetoresistive head.15) Constructing the force-sensing cantilever/tip device is a major task for the force microscope. Many chemistries and metallic modified c ...
... of the cantilever consists of using optical interferometry,1–6) capacitance,7,8) point-contact current-imaging,9) beam deflection,10–14) and magnetoresistive head.15) Constructing the force-sensing cantilever/tip device is a major task for the force microscope. Many chemistries and metallic modified c ...
Wavefront-sensor-based electron density measurements for laser
... A simple single-shot wavefront-sensor-based electron density diagnostic is presented that relies on the use of a wavefront sensor. The design requires only one arm of a nonperturbative probe laser beam. Postanalysis requires only the computation of an Abel inversion. Successful resolution tests were ...
... A simple single-shot wavefront-sensor-based electron density diagnostic is presented that relies on the use of a wavefront sensor. The design requires only one arm of a nonperturbative probe laser beam. Postanalysis requires only the computation of an Abel inversion. Successful resolution tests were ...
An Introduction to Propagation, Time Reversal and Imaging in
... relative fluctuation of index of refraction ñ as ˜ ≈ 2ñ for ñ 1. The free, undisturbed propagation is described by the free-space Green function G0 (r, r0 ) = − ...
... relative fluctuation of index of refraction ñ as ˜ ≈ 2ñ for ñ 1. The free, undisturbed propagation is described by the free-space Green function G0 (r, r0 ) = − ...
Self-Organization, Broken Symmetry, and Lasing in an Atomic Vapor:
... nT 40 atomsyl3optical calculated by equating the CARL bandwidth vr r [1,14] with the inhomogeneous linewidth. In the CARL theory, the gain is dominated by the collective bandwidth. Here, since vr r . DDop , Doppler averaging should not destroy the grating enhanced gain [15]. Furthermore, the fact ...
... nT 40 atomsyl3optical calculated by equating the CARL bandwidth vr r [1,14] with the inhomogeneous linewidth. In the CARL theory, the gain is dominated by the collective bandwidth. Here, since vr r . DDop , Doppler averaging should not destroy the grating enhanced gain [15]. Furthermore, the fact ...
PPTX - University of Toronto Physics
... neither exactly in phase nor exactly out of phase. (as we learned from today’s pre-class quiz!) ...
... neither exactly in phase nor exactly out of phase. (as we learned from today’s pre-class quiz!) ...
SRON presentation - University of Groningen
... λ = free space wavelength z = distance from beam waist (“focus”) w0 = beam waist radius ...
... λ = free space wavelength z = distance from beam waist (“focus”) w0 = beam waist radius ...
Prediction of photothermal phase signatures from arbitrary
... Our heat model assumes that small solid particles with high surface to volume ratio, which are situated within a liquid medium, experience strong frictional forces causing them to quickly minimize their speed relative to the medium. This behavior is relevant for nanoparticles suspended in fluid, and ...
... Our heat model assumes that small solid particles with high surface to volume ratio, which are situated within a liquid medium, experience strong frictional forces causing them to quickly minimize their speed relative to the medium. This behavior is relevant for nanoparticles suspended in fluid, and ...
Experimental demonstration of subwavelength field channeling at
... It was theoretically shown by Notomi1 and experimentally proven by Parimi et al.2 that in photonic crystals 共PC兲 or electromagnetic crystals 共EC兲 negative refraction can be achieved at frequencies close to the electromagnetic bandgap edges. Developing this direction of studies, Luo et al. introduced ...
... It was theoretically shown by Notomi1 and experimentally proven by Parimi et al.2 that in photonic crystals 共PC兲 or electromagnetic crystals 共EC兲 negative refraction can be achieved at frequencies close to the electromagnetic bandgap edges. Developing this direction of studies, Luo et al. introduced ...
Simultaneous Measurements of Hard X Rays and Second
... photon energy. This spectrum was recorded with the incident laser light set in a mixed SyP polarization, that is, with the half-wave plate rotated by 20± with respect to the P-polarization configuration. The behavior of the total x-ray energy as a function of the angle of the half-wave plate is show ...
... photon energy. This spectrum was recorded with the incident laser light set in a mixed SyP polarization, that is, with the half-wave plate rotated by 20± with respect to the P-polarization configuration. The behavior of the total x-ray energy as a function of the angle of the half-wave plate is show ...
Supplementary Information (doc 4223K)
... to achieve large optical nonlinearity to reduce the pump power for ultrafast optical tunability. Gold triangles have stronger surface plasmon polariton resonances according to our previous work (see Cuicui Lu, et al. Plasmonics, 7, 159 (2011)). Thirdly, it is flexible to use triangle dimer to achiev ...
... to achieve large optical nonlinearity to reduce the pump power for ultrafast optical tunability. Gold triangles have stronger surface plasmon polariton resonances according to our previous work (see Cuicui Lu, et al. Plasmonics, 7, 159 (2011)). Thirdly, it is flexible to use triangle dimer to achiev ...
Measurement of transparent plates with
... transparent plate being placed close to the reference surface nearly eliminates the effect of backsurface reflections. There are several other system configurations and algorithms that use the same principle. An interesting alternative is the case in which ⌫ ⫽ 0.5. The two first-order unwanted modul ...
... transparent plate being placed close to the reference surface nearly eliminates the effect of backsurface reflections. There are several other system configurations and algorithms that use the same principle. An interesting alternative is the case in which ⌫ ⫽ 0.5. The two first-order unwanted modul ...
as a PDF - Department of Engineering Science
... We also note that rays from the object space are mapped onto conjugate rays with the same angle in image space, in accordance with Eq. (2). As such it is possible to see that the limiting angular aperture in the system cmax will essentially limit the overall resolution of the instrument. The effecti ...
... We also note that rays from the object space are mapped onto conjugate rays with the same angle in image space, in accordance with Eq. (2). As such it is possible to see that the limiting angular aperture in the system cmax will essentially limit the overall resolution of the instrument. The effecti ...
Atomic Spectroscopy
... The function of the chopper: Is to chop the light leaving the source so that when the incident beam hits the chopper at the solid surface, the beam will be blocked and detector will only read the emitted signal from the flame. As the chopper rotates and the beam emerges to the detector, the detecto ...
... The function of the chopper: Is to chop the light leaving the source so that when the incident beam hits the chopper at the solid surface, the beam will be blocked and detector will only read the emitted signal from the flame. As the chopper rotates and the beam emerges to the detector, the detecto ...
12. confocal microscopy.
... 12.1. Confocal Microscopy Confocal microscopy can render depth-resolved slices through a 3D object by rejecting much of the out of focus light via a pinhole. In confocal microscopy the image is reconstructed serially, i.e. point by point, using a single photodetector, rather than in parallel (in bri ...
... 12.1. Confocal Microscopy Confocal microscopy can render depth-resolved slices through a 3D object by rejecting much of the out of focus light via a pinhole. In confocal microscopy the image is reconstructed serially, i.e. point by point, using a single photodetector, rather than in parallel (in bri ...
Determining Shape and Fringe Count in a Holographic
... Gabor in 1947, in which one not only records the amplitude but also the phase of the light wave. It is simply interference. During the recording process a standing –wave interference (fringe) pattern is generated where the reference beam and object beam interfere within the recording layer. This pat ...
... Gabor in 1947, in which one not only records the amplitude but also the phase of the light wave. It is simply interference. During the recording process a standing –wave interference (fringe) pattern is generated where the reference beam and object beam interfere within the recording layer. This pat ...
Document
... pattern, depending upon the approximations used in describing it. Related terms: Scattering (of particles) Reflection (by atom plans in a solid) ...
... pattern, depending upon the approximations used in describing it. Related terms: Scattering (of particles) Reflection (by atom plans in a solid) ...
1 Organic Molecules and Decoherence Experiments in a Molecule
... appearances. This field has gained an even increased attention because of the fact that quantum phenomena on the mesoscopic or even macroscopic scale promise to be useful for future technologies, such as in lithography with clusters and molecules, quantum computing or highly sensitive quantum sensors ...
... appearances. This field has gained an even increased attention because of the fact that quantum phenomena on the mesoscopic or even macroscopic scale promise to be useful for future technologies, such as in lithography with clusters and molecules, quantum computing or highly sensitive quantum sensors ...
... conducted for three samples with different phase gradients of 3.6, 4.0, and 4.4 rad/mm. The measured refraction angles agree well with the theoretical predictions (solid curves). The angles are the same for both the left and right circularly polarized light. (Inset) Schematic depiction of the light ...
Phase-contrast X-ray imaging
Phase-contrast X-ray imaging (PCI) or phase-sensitive X-ray imaging is a general term for different technical methods that use information concerning changes in the phase of an X-ray beam that passes through an object in order to create its images. Standard X-ray imaging techniques like radiography or computed tomography (CT) rely on a decrease of the X-ray beam's intensity (attenuation) when traversing the sample, which can be measured directly with the assistance of an X-ray detector. In PCI however, the beam's phase shift caused by the sample is not measured directly, but is transformed into variations in intensity, which then can be recorded by the detector.In addition to producing projection images, PCI, like conventional transmission, can be combined with tomographic techniques to obtain the 3D distribution of the real part of the refractive index of the sample. When applied to samples that consist of atoms with low atomic number Z, PCI is more sensitive to density variations in the sample than conventional transmission-based X-ray imaging. This leads to images with improved soft tissue contrast.In the last several years, a variety of phase-contrast X-ray imaging techniques have been developed, all of which are based on the observation of interference patterns between diffracted and undiffracted waves. The most common techniques are crystal interferometry, propagation-based imaging, analyzer-based imaging, edge-illumination and grating-based imaging (see below).