Construction of a Calcium Matter-Wave Interferometer
... sey as an atomic clock [4–7]. Even though the atom beam never split spatially, its wave function was nonetheless split and recombined. The first true separated beam atom interferometer was published in 1991 by Carnal and Mlynek, who used narrow slits to split and recombine metastable helium atoms [8 ...
... sey as an atomic clock [4–7]. Even though the atom beam never split spatially, its wave function was nonetheless split and recombined. The first true separated beam atom interferometer was published in 1991 by Carnal and Mlynek, who used narrow slits to split and recombine metastable helium atoms [8 ...
A Beam Tracing Approach to Acoustic Modeling for Interactive Virtual Environments
... and mirror operations [36], possibly splitting rays as they diverge with distance [31, 42]. In this case, the beam representation is only useful for modeling the distribution of rays/energy with distance and for avoiding large tolerances in ray-receiver intersection calculations. If beams are not cl ...
... and mirror operations [36], possibly splitting rays as they diverge with distance [31, 42]. In this case, the beam representation is only useful for modeling the distribution of rays/energy with distance and for avoiding large tolerances in ray-receiver intersection calculations. If beams are not cl ...
Direct welding of fused silica with femtosecond fiber laser
... number of advantages – simple, cost effective and capability of wide variety of material processing and “at will” structure writing. In addition, fs laser pulses give the potential to directly write structures inside transparent materials which are impossible with traditional continuous wave or long ...
... number of advantages – simple, cost effective and capability of wide variety of material processing and “at will” structure writing. In addition, fs laser pulses give the potential to directly write structures inside transparent materials which are impossible with traditional continuous wave or long ...
Orbital angular momentum: origins
... used ultrasound scattered from a rough surface and noted that the spatial form of the returned signal contained intensity nulls around which the phase of the signal changed by 2π. Undoubtedly it was this identification of phase singularities within randomly scattered fields that inspired the present ...
... used ultrasound scattered from a rough surface and noted that the spatial form of the returned signal contained intensity nulls around which the phase of the signal changed by 2π. Undoubtedly it was this identification of phase singularities within randomly scattered fields that inspired the present ...
Translation and discussion of the De Iride, a
... Department of Applied Science and Technology,Politecnico di Torino, Italy Here I am proposing a translation and discussion of the De Iride, one of the short scientific treatise written by Robert Grosseteste. In the first part of his Latin text we find reflection and refraction of light, described in ...
... Department of Applied Science and Technology,Politecnico di Torino, Italy Here I am proposing a translation and discussion of the De Iride, one of the short scientific treatise written by Robert Grosseteste. In the first part of his Latin text we find reflection and refraction of light, described in ...
Nonlinear Beam Shaping with Plasmonic Metasurfaces
... ABSTRACT: We present here a method for generating second-harmonic beams with tailored beam profiles using nonlinear metasurfaces based on split ring resonators. By manipulating both the phase and the amplitude of the quadratic nonlinear coefficient locally, at the single inclusion level, the emitted se ...
... ABSTRACT: We present here a method for generating second-harmonic beams with tailored beam profiles using nonlinear metasurfaces based on split ring resonators. By manipulating both the phase and the amplitude of the quadratic nonlinear coefficient locally, at the single inclusion level, the emitted se ...
Applications of spatial light modulators for optical trapping and
... light field. This phenomenon could be explained by an asymmetric, prism-like particle shape, an asymmetric radial intensity profile of the projected light field, and the particle confinement in the air-liquid interface (Jesacher et al., 2006c). Generally, the forces on microparticles emerging in opt ...
... light field. This phenomenon could be explained by an asymmetric, prism-like particle shape, an asymmetric radial intensity profile of the projected light field, and the particle confinement in the air-liquid interface (Jesacher et al., 2006c). Generally, the forces on microparticles emerging in opt ...
reflection properties of a gaussian laser beam from multilayer
... A laser microphone is a surveillance device that uses a laser beam to detect sound vibrations in a distant object. The object is typically inside a room where a conversation is taking place, and can be anything that can vibrate (for example, picture or window) in response to the sound waves of the c ...
... A laser microphone is a surveillance device that uses a laser beam to detect sound vibrations in a distant object. The object is typically inside a room where a conversation is taking place, and can be anything that can vibrate (for example, picture or window) in response to the sound waves of the c ...
Optical and acoustic beam shaping for imaging and
... Figure 1-1 Absorption spectra of EM waves for water .................................... 4 Figure 1-2 The famous double-slit experimen. .................................................. 8 Figure 1-3 The wavefronts of a plane wave traveling in 3D-space. ............... 9 Figure 2-1 Gaussian beam wai ...
... Figure 1-1 Absorption spectra of EM waves for water .................................... 4 Figure 1-2 The famous double-slit experimen. .................................................. 8 Figure 1-3 The wavefronts of a plane wave traveling in 3D-space. ............... 9 Figure 2-1 Gaussian beam wai ...
Preparation of Poincare' beams with a same-path polarization/spatial-mode interferoemter
... because they carry a mapping of all states of polarization, as represented on the Poincaré sphere, onto the transverse mode of the beam.1 These beams are a general type of space-variant polarization modes of which cylindrical vector beams are a subset. Poincare beams have been generated by direct su ...
... because they carry a mapping of all states of polarization, as represented on the Poincaré sphere, onto the transverse mode of the beam.1 These beams are a general type of space-variant polarization modes of which cylindrical vector beams are a subset. Poincare beams have been generated by direct su ...
Optically Pumped Solid-State Lasers
... 8.6 The Nd:YAG Laser YAG has a combination of desirable properties as a host medium for Nd3+ ions: it has relatively high thermal conductivity, which allows it to disperse the waste heat from the optical pumping process; it has high mechanical strength, and can be grown as crystals of large size wit ...
... 8.6 The Nd:YAG Laser YAG has a combination of desirable properties as a host medium for Nd3+ ions: it has relatively high thermal conductivity, which allows it to disperse the waste heat from the optical pumping process; it has high mechanical strength, and can be grown as crystals of large size wit ...
Parallelized STED fluorescence nanoscopy
... the sample and adjusting ISTED one can define the coordinate in space where the fluorophores can still assume the fluorescent state, i.e. are not 'switched off' by the enforced occupation of the ground state [9, 10]. The most common STED microscopy configuration is to overlay a diffraction-limited f ...
... the sample and adjusting ISTED one can define the coordinate in space where the fluorophores can still assume the fluorescent state, i.e. are not 'switched off' by the enforced occupation of the ground state [9, 10]. The most common STED microscopy configuration is to overlay a diffraction-limited f ...
Skin Perfusion Photography
... skin perfusion maps and can be integrated with these methods with, e.g., a high-speed camera or projector. Skin perfusion analysis via LSCI was suggested by Briers [4]. A similar system was suggested later [29]. Analysis of wound healing in pigs was performed recently [30]. Commercial devices [24] e ...
... skin perfusion maps and can be integrated with these methods with, e.g., a high-speed camera or projector. Skin perfusion analysis via LSCI was suggested by Briers [4]. A similar system was suggested later [29]. Analysis of wound healing in pigs was performed recently [30]. Commercial devices [24] e ...
Microscopes - Biozentrum
... The necessary phase shift is introduced by rings etched accurately onto glass plates so that they introduce the required phase shift when inserted into the ...
... The necessary phase shift is introduced by rings etched accurately onto glass plates so that they introduce the required phase shift when inserted into the ...
Optical phase conjugation: principles, techniques, and applications
... G.S. He / Progress in Quantum Electronics 26 (2002) 131–191 ...
... G.S. He / Progress in Quantum Electronics 26 (2002) 131–191 ...
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... In this paper, we report on the first direct observation of modulation instability of a partially spatially incoherent beam as a function of the perturbation period. We provide experimental evidence that such induced incoherent MI depends strongly on the perturbation period 共or spatial frequency兲, a ...
... In this paper, we report on the first direct observation of modulation instability of a partially spatially incoherent beam as a function of the perturbation period. We provide experimental evidence that such induced incoherent MI depends strongly on the perturbation period 共or spatial frequency兲, a ...
Holography
Holography is the science and practice of making holograms. Typically, a hologram is a photographic recording of a light field, rather than of an image formed by a lens, and it is used to display a fully three-dimensional image of the holographed subject, which is seen without the aid of special glasses or other intermediate optics. The hologram itself is not an image and it is usually unintelligible when viewed under diffuse ambient light. It is an encoding of the light field as an interference pattern of seemingly random variations in the opacity, density, or surface profile of the photographic medium. When suitably lit, the interference pattern diffracts the light into a reproduction of the original light field and the objects that were in it appear to still be there, exhibiting visual depth cues such as parallax and perspective that change realistically with any change in the relative position of the observer.In its pure form, holography requires the use of laser light for illuminating the subject and for viewing the finished hologram. In a side-by-side comparison under optimal conditions, a holographic image is visually indistinguishable from the actual subject, if the hologram and the subject are lit just as they were at the time of recording. A microscopic level of detail throughout the recorded volume of space can be reproduced. In common practice, however, major image quality compromises are made to eliminate the need for laser illumination when viewing the hologram, and sometimes, to the extent possible, also when making it. Holographic portraiture often resorts to a non-holographic intermediate imaging procedure, to avoid the hazardous high-powered pulsed lasers otherwise needed to optically ""freeze"" living subjects as perfectly as the extremely motion-intolerant holographic recording process requires. Holograms can now also be entirely computer-generated and show objects or scenes that never existed.Holography should not be confused with lenticular and other earlier autostereoscopic 3D display technologies, which can produce superficially similar results but are based on conventional lens imaging. Stage illusions such as Pepper's Ghost and other unusual, baffling, or seemingly magical images are also often incorrectly called holograms.