Recent advances in transformation optics
... multilayered metallic shells may reduce the ‘‘visibility’’ of the object by several orders of magnitude simultaneously at multiple frequencies.19 Meanwhile, researchers have been actively exploring the interesting physics associated with invisibility cloaks,20–24 or trying to detect an invisibility ...
... multilayered metallic shells may reduce the ‘‘visibility’’ of the object by several orders of magnitude simultaneously at multiple frequencies.19 Meanwhile, researchers have been actively exploring the interesting physics associated with invisibility cloaks,20–24 or trying to detect an invisibility ...
Spectral Domain Optical Coherence Tomography
... that there is a statistically significant difference in the central 5.9 to 6.0 mm macular volume between normal and glaucomatous eyes.30-32 Therefore, SDOCT may better enable detection of changes in the macular retinal ganglion cell layer, which is only 4 to 6 cells thick.33,34 In eye diseases where ...
... that there is a statistically significant difference in the central 5.9 to 6.0 mm macular volume between normal and glaucomatous eyes.30-32 Therefore, SDOCT may better enable detection of changes in the macular retinal ganglion cell layer, which is only 4 to 6 cells thick.33,34 In eye diseases where ...
Novel 3-D microscopy techniques - Purdue University Cytometry
... submicrometer resolution down to a depth of a few hundred microns. • 2-p microscopy separates excitation and emission light more effectively • All the emitted photons from multi-photon excitation can be used for imaging (in principle) therefore no confocal blocking apertures have to be used. ...
... submicrometer resolution down to a depth of a few hundred microns. • 2-p microscopy separates excitation and emission light more effectively • All the emitted photons from multi-photon excitation can be used for imaging (in principle) therefore no confocal blocking apertures have to be used. ...
Improved Theoretical Reflectivities of Extreme Ultraviolet Mirrors
... reflectivity EUV mirrors for near-normal incidence operation are Mo/Be and Mo/Si multilayer systems that exhibit particularly high reflectivities in the 11.2-12.0 nm and 12.8-14.0 nm spectral regions, respectively [3-5]. The motivation behind this work is the pressing need for optical throughput enh ...
... reflectivity EUV mirrors for near-normal incidence operation are Mo/Be and Mo/Si multilayer systems that exhibit particularly high reflectivities in the 11.2-12.0 nm and 12.8-14.0 nm spectral regions, respectively [3-5]. The motivation behind this work is the pressing need for optical throughput enh ...
PDF
... are determined by the numerical apertures of the fiber and the geometrical settings of the optical elements composing the spectral filter. The pump is a 5-ps-duration mode-locked pulse train with a repetition rate of 75.3 MHz, obtained by spatially dispersing the output of an optical parametric osci ...
... are determined by the numerical apertures of the fiber and the geometrical settings of the optical elements composing the spectral filter. The pump is a 5-ps-duration mode-locked pulse train with a repetition rate of 75.3 MHz, obtained by spatially dispersing the output of an optical parametric osci ...
Document
... ★ Light can alter its frequency as it passes through a nonlinear optical material (e.g., from red to blue!). ★ Light can control light; photons do interact Light interacts with light via the medium. The presence of an optical field modifies the properties of the medium which, in turn, modify another ...
... ★ Light can alter its frequency as it passes through a nonlinear optical material (e.g., from red to blue!). ★ Light can control light; photons do interact Light interacts with light via the medium. The presence of an optical field modifies the properties of the medium which, in turn, modify another ...
3D Finite Element Model for Writing Long
... microns. The length of a LPFG is of the order of a few centimeters with periods of hundreds of micrometers. LPFGs require therefore simpler fabrication processes and have lower costs, and show lower retro-reflection, higher sensitivity and robustness in sensing applications when compared with FBG [8 ...
... microns. The length of a LPFG is of the order of a few centimeters with periods of hundreds of micrometers. LPFGs require therefore simpler fabrication processes and have lower costs, and show lower retro-reflection, higher sensitivity and robustness in sensing applications when compared with FBG [8 ...
Optical Fibers and Waveguides
... When a given mode propagates in a slab, light energy is guided along in the slab medium, or core. There are, however, finite field amplitudes that decay exponentially into the external medium. The propagating waves in this case, because they are guided along by the slab, but are not totally confined ...
... When a given mode propagates in a slab, light energy is guided along in the slab medium, or core. There are, however, finite field amplitudes that decay exponentially into the external medium. The propagating waves in this case, because they are guided along by the slab, but are not totally confined ...
Stimulated Brillouin scattering parasitics in large
... Stimulated Brillouin scattering" 2 (SBS) is an allowed nonlinear process in all media and has previously3 been associated with damage processes in mirrors and windows. Scaling of UV excimer lasers for kilojoule, short-pulse (10 nsec), narrow-band (<0.5 cm-') operation creates the potential for trans ...
... Stimulated Brillouin scattering" 2 (SBS) is an allowed nonlinear process in all media and has previously3 been associated with damage processes in mirrors and windows. Scaling of UV excimer lasers for kilojoule, short-pulse (10 nsec), narrow-band (<0.5 cm-') operation creates the potential for trans ...
measuring wavelength discrimination threshold along the entire
... wavelength discrimination threshold. The heart of the equipment is a circular shape bi-partial disappearing sharp edge viewfield shown in a 4◦ viewfield. We project a given wavelength monochromatic reference light into one part and simultaneously a slightly different wavelength monochromatic measuri ...
... wavelength discrimination threshold. The heart of the equipment is a circular shape bi-partial disappearing sharp edge viewfield shown in a 4◦ viewfield. We project a given wavelength monochromatic reference light into one part and simultaneously a slightly different wavelength monochromatic measuri ...
Recent advances in transformation optics
... multilayered metallic shells may reduce the ‘‘visibility’’ of the object by several orders of magnitude simultaneously at multiple frequencies.19 Meanwhile, researchers have been actively exploring the interesting physics associated with invisibility cloaks,20–24 or trying to detect an invisibility ...
... multilayered metallic shells may reduce the ‘‘visibility’’ of the object by several orders of magnitude simultaneously at multiple frequencies.19 Meanwhile, researchers have been actively exploring the interesting physics associated with invisibility cloaks,20–24 or trying to detect an invisibility ...
lens shape - CVI Laser Optics
... At infinite conjugate with a typical glass singlet, the plano-convex shape (q = 1), with convex side toward the infinite conjugate, performs nearly as well as the bestform lens. Because a plano-convex lens costs much less to manufacture than an asymmetric biconvex singlet, these lenses are quite pop ...
... At infinite conjugate with a typical glass singlet, the plano-convex shape (q = 1), with convex side toward the infinite conjugate, performs nearly as well as the bestform lens. Because a plano-convex lens costs much less to manufacture than an asymmetric biconvex singlet, these lenses are quite pop ...
Experimental implementation of the gyrator transform - E
... spherical one. We observe that for ␣ = , occurring when the generalized lenses L1 and L2 are reduced to the spherical lenses, the common 4-f system—a cascade of two Fourier transforming systems—is obtained. Therefore the proposed gyrator system can be considered as a generalization of the well-know ...
... spherical one. We observe that for ␣ = , occurring when the generalized lenses L1 and L2 are reduced to the spherical lenses, the common 4-f system—a cascade of two Fourier transforming systems—is obtained. Therefore the proposed gyrator system can be considered as a generalization of the well-know ...
IOSR Journal of Applied Physics (IOSR-JAP)
... these bands were assigned to π-π* and n-π* electronic transitions respectively [9-10]. The absorption spectra of PANI/ PVA of (0.28, 0.42,0.5 and 1 wt %) show two characteristic absorption peaks attributed to the conducting emeraldine salt. That at 300 nm was assigned to the – ∗ transition and the o ...
... these bands were assigned to π-π* and n-π* electronic transitions respectively [9-10]. The absorption spectra of PANI/ PVA of (0.28, 0.42,0.5 and 1 wt %) show two characteristic absorption peaks attributed to the conducting emeraldine salt. That at 300 nm was assigned to the – ∗ transition and the o ...
Influence of the Brownian movement on the motion of nano
... One of the most actual tasks of the present day biomedicine is to control micro−particles and nano−particles of different nature with help of laser radiation. A controlled object can be a colloid particle, a molecule, an atom or a cell, including a bio−object, e.g., a DNA molecule, an organelle cell ...
... One of the most actual tasks of the present day biomedicine is to control micro−particles and nano−particles of different nature with help of laser radiation. A controlled object can be a colloid particle, a molecule, an atom or a cell, including a bio−object, e.g., a DNA molecule, an organelle cell ...
properties of laser beams
... called mode locking, it is possible to produce light pulses whose duration is roughly equal to the inverse of the linewidth of the laser transition 2→1. • If the line width is narrow the pulse width is very short~ 0.1-1 ns some flash lamps can emit light pulses with a duration of somewhat less than ...
... called mode locking, it is possible to produce light pulses whose duration is roughly equal to the inverse of the linewidth of the laser transition 2→1. • If the line width is narrow the pulse width is very short~ 0.1-1 ns some flash lamps can emit light pulses with a duration of somewhat less than ...
IOSR Journal of Applied Physics (IOSR-JAP)
... enhanced Raman scattering(SERS) [6], drug delivery in a cancerous tumour [7], biosensors [8-9], cosmetic and beauty applications [10], biological labeling, information storage, etc., this is because of the unique properties due to high surface area and exceptional surface activity. The free electron ...
... enhanced Raman scattering(SERS) [6], drug delivery in a cancerous tumour [7], biosensors [8-9], cosmetic and beauty applications [10], biological labeling, information storage, etc., this is because of the unique properties due to high surface area and exceptional surface activity. The free electron ...
paper
... agreement with a classical analysis, which treated the rotation of the plane of polarization locally at each point along the fiber for the case of a uniform helix by use of differential geometry. The experimental setup is schematically shown in Fig. 1(a). A He-Ne laser and a pair of linear polarizer ...
... agreement with a classical analysis, which treated the rotation of the plane of polarization locally at each point along the fiber for the case of a uniform helix by use of differential geometry. The experimental setup is schematically shown in Fig. 1(a). A He-Ne laser and a pair of linear polarizer ...
Silicon photonics
Silicon photonics is the study and application of photonic systems which use silicon as an optical medium. The silicon is usually patterned with sub-micrometre precision, into microphotonic components. These operate in the infrared, most commonly at the 1.55 micrometre wavelength used by most fiber optic telecommunication systems. The silicon typically lies on top of a layer of silica in what (by analogy with a similar construction in microelectronics) is known as silicon on insulator (SOI).Silicon photonic devices can be made using existing semiconductor fabrication techniques, and because silicon is already used as the substrate for most integrated circuits, it is possible to create hybrid devices in which the optical and electronic components are integrated onto a single microchip. Consequently, silicon photonics is being actively researched by many electronics manufacturers including IBM and Intel, as well as by academic research groups such as that of Prof. Michal Lipson, who see it is a means for keeping on track with Moore's Law, by using optical interconnects to provide faster data transfer both between and within microchips.The propagation of light through silicon devices is governed by a range of nonlinear optical phenomena including the Kerr effect, the Raman effect, two photon absorption and interactions between photons and free charge carriers. The presence of nonlinearity is of fundamental importance, as it enables light to interact with light, thus permitting applications such as wavelength conversion and all-optical signal routing, in addition to the passive transmission of light.Silicon waveguides are also of great academic interest, due to their ability to support exotic nonlinear optical phenomena such as soliton propagation.