Laser tweezers and their applications
... molecules consist of two long chains that resemble legs. With optical tweezers, it has been found[17] that these molecules literally "walk" around the cytoskeleton, carrying material through the interior of the cell, and that they walk in steps of 8 nm [19] at a time! Perhaps the most exotic use of ...
... molecules consist of two long chains that resemble legs. With optical tweezers, it has been found[17] that these molecules literally "walk" around the cytoskeleton, carrying material through the interior of the cell, and that they walk in steps of 8 nm [19] at a time! Perhaps the most exotic use of ...
Large-Area Laser-Lift-Off Processing in
... that laser radiation is locally and flexibly applicable as well as a non-contact type of interaction, laser processes are particularly suited for manufacturing thin microelectronic components. For a recent overview on excimer lasers in microelectronics see Delmdahl, 2010. Furthermore, lasers in indu ...
... that laser radiation is locally and flexibly applicable as well as a non-contact type of interaction, laser processes are particularly suited for manufacturing thin microelectronic components. For a recent overview on excimer lasers in microelectronics see Delmdahl, 2010. Furthermore, lasers in indu ...
Broad Band Two-Dimensional Manipulation of Surface Plasmons
... As we discussed in our previous simulation study,20 the contrast of the interference pattern will not be affected by the distance between the edges which is not much larger than the SPP propagation length. We repeat the previous experiment with two unparallel slits (the slit width is around 300 nm a ...
... As we discussed in our previous simulation study,20 the contrast of the interference pattern will not be affected by the distance between the edges which is not much larger than the SPP propagation length. We repeat the previous experiment with two unparallel slits (the slit width is around 300 nm a ...
Radially and azimuthally polarized beams generated by space
... a singularity. Vortices are H characterized by a topological charge, l 苷 共1兾2p兲 =wds, where w is the phase of the beam and l is an integer. Until now, research had focused mainly on f ield dislocations in scalar waves. However, if we allow for the polarization to be space varying (i.e., transversely ...
... a singularity. Vortices are H characterized by a topological charge, l 苷 共1兾2p兲 =wds, where w is the phase of the beam and l is an integer. Until now, research had focused mainly on f ield dislocations in scalar waves. However, if we allow for the polarization to be space varying (i.e., transversely ...
PDF only - at www.arxiv.org.
... the group velocity reduction below the speed of light in the case of certain Bessel beam pulses has been considered and an idea of its application for a natural optical buffer presented. However, the authors treat the problem as if only one type of Bessel pulse existed, no matter how it is gener ...
... the group velocity reduction below the speed of light in the case of certain Bessel beam pulses has been considered and an idea of its application for a natural optical buffer presented. However, the authors treat the problem as if only one type of Bessel pulse existed, no matter how it is gener ...
Direct Laser Writing: Versatile Tool for Microfabrication of Lithium
... close to the calculated value, axial size was somewhat larger, approximately 60 µm, as is illustrated by side-view optical image shown in Fig. 4(a). While elongation of the focus limits the axial resolution of DLW, it may be helpful for fast fabrication of thick DOEs. Precise reason for such elongat ...
... close to the calculated value, axial size was somewhat larger, approximately 60 µm, as is illustrated by side-view optical image shown in Fig. 4(a). While elongation of the focus limits the axial resolution of DLW, it may be helpful for fast fabrication of thick DOEs. Precise reason for such elongat ...
Three-dimensional imaging of a phase object from a single sample... Chien-Chun Chen, Huaidong Jiang, Lu Rong,
... was first measured and then directly phased to obtain an image. The well-known phase problem was solved by oversampling the diffraction intensity2,3 in combination of iterative algorithms.4–7 Using synchrotron radiation, high harmonic generation, soft x-ray laser sources, and free electron lasers, c ...
... was first measured and then directly phased to obtain an image. The well-known phase problem was solved by oversampling the diffraction intensity2,3 in combination of iterative algorithms.4–7 Using synchrotron radiation, high harmonic generation, soft x-ray laser sources, and free electron lasers, c ...
Angular directivity of diffracted wave in Bragg-mismatched A. Heifetz
... The transverse shift of the outgoing beam expected from this model is too small to measure easily for the sample thickness of the order of 50 lm and a Gaussian beam with a waist size of about 1 mm. Note also that this model is consistent with the requirement that the direction of kR would follow the ...
... The transverse shift of the outgoing beam expected from this model is too small to measure easily for the sample thickness of the order of 50 lm and a Gaussian beam with a waist size of about 1 mm. Note also that this model is consistent with the requirement that the direction of kR would follow the ...
Adiabatic far-field sub-diffraction imaging ARTICLE Hu Cang *, Alessandro Salandrino
... lthough a tsunami is devastating near land, it is barely noticeable in the open ocean. This is because the sea floor near the land slows down the tsunami, compressing its wavelength from hundreds of kilometres1 to metres and rapidly increasing its amplitude to be destructive. Recently, a similar opti ...
... lthough a tsunami is devastating near land, it is barely noticeable in the open ocean. This is because the sea floor near the land slows down the tsunami, compressing its wavelength from hundreds of kilometres1 to metres and rapidly increasing its amplitude to be destructive. Recently, a similar opti ...
Laser Cutting
... photon, which on its own is not very bright, enters a laser amplifier, which is an appropriate collection of excited atoms then the light is amplified and becomes brighter because it leaves as many photons of light, all identical of course. A Laser oscillator is a device that encloses the laser medi ...
... photon, which on its own is not very bright, enters a laser amplifier, which is an appropriate collection of excited atoms then the light is amplified and becomes brighter because it leaves as many photons of light, all identical of course. A Laser oscillator is a device that encloses the laser medi ...
JMacePaper.doc
... hard to get stimulated emission to occur, as the probability of an emitted photon encountering another excited atom would be small. It ends up that what is necessary to accomplish laser action is to have more atoms in an excited state than in the lower state, known as a population inversion. Without ...
... hard to get stimulated emission to occur, as the probability of an emitted photon encountering another excited atom would be small. It ends up that what is necessary to accomplish laser action is to have more atoms in an excited state than in the lower state, known as a population inversion. Without ...
this paper (free) - International Journal of Pure and
... Here, one can observe that, how the reflection and transmission of the beam are affected by the variation of I (peak intensity of wave packet). We found that the optical beam which is in the mode of total internal reflection could be switched to solitonic transmission mode merely by increasing its p ...
... Here, one can observe that, how the reflection and transmission of the beam are affected by the variation of I (peak intensity of wave packet). We found that the optical beam which is in the mode of total internal reflection could be switched to solitonic transmission mode merely by increasing its p ...
Imaging and Measurement of Thermal Lensing in Glass
... 2.4 Chirped Pulse Amplification In order to make the ultra-short pulses from the laser oscillator usable for physics experiments, they must be further amplified. The method used is known as chirped pulse amplification. First, a pulse from the oscillator is picked out of the stream of pulses. This pu ...
... 2.4 Chirped Pulse Amplification In order to make the ultra-short pulses from the laser oscillator usable for physics experiments, they must be further amplified. The method used is known as chirped pulse amplification. First, a pulse from the oscillator is picked out of the stream of pulses. This pu ...
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.