Sun et al., Nature 493, 195 (2013).
... information—an image with the MIT logo. Until now, image information has generally been stored and transmitted through the intensity of the pixels; in contrast, this large-scale NPA technology opens up another dimension for imaging: the image information is now encoded in the optical phase of the pi ...
... information—an image with the MIT logo. Until now, image information has generally been stored and transmitted through the intensity of the pixels; in contrast, this large-scale NPA technology opens up another dimension for imaging: the image information is now encoded in the optical phase of the pi ...
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... waveguide coupling, and simultaneously the bandgap attains the maximum bandwidth. At higher optical powers, nonlinear effects become important, and we perform numerical simulations of the coupler equations to model pulse propagation for the structure size equal to three coupling lengths, L = 3Lc. In ...
... waveguide coupling, and simultaneously the bandgap attains the maximum bandwidth. At higher optical powers, nonlinear effects become important, and we perform numerical simulations of the coupler equations to model pulse propagation for the structure size equal to three coupling lengths, L = 3Lc. In ...
DU4301727731
... The nonlinear coefficients of the Ethidium bromide dye was measured by using Z-scan technique, which is a well-known technique that allows the simultaneous measurement of both nonlinear absorption coefficient β and the nonlinear refractive coefficient n2. A spatial distribution of the temperature in ...
... The nonlinear coefficients of the Ethidium bromide dye was measured by using Z-scan technique, which is a well-known technique that allows the simultaneous measurement of both nonlinear absorption coefficient β and the nonlinear refractive coefficient n2. A spatial distribution of the temperature in ...
Intermittent measurement
... described in his book “Opticks” published in 1704. This was two and a half century before the same colours were used for the control of thin film thickness. Single layer and multilayer coatings were controlled by examining their reflected colour2. The human eye was used as the detector like in Newto ...
... described in his book “Opticks” published in 1704. This was two and a half century before the same colours were used for the control of thin film thickness. Single layer and multilayer coatings were controlled by examining their reflected colour2. The human eye was used as the detector like in Newto ...
tuning of material optical properties by modification of interlayer
... Thin layer optical materials are becoming increasingly popular because of their excellent properties while also having well known relatively simple manufacturing process such as magnetron or electrodeposition methods. Those kinds of materials are widely utilized in optical filters [1-5], photonic cr ...
... Thin layer optical materials are becoming increasingly popular because of their excellent properties while also having well known relatively simple manufacturing process such as magnetron or electrodeposition methods. Those kinds of materials are widely utilized in optical filters [1-5], photonic cr ...
Optics - Frederiksen
... This simple, high intensity light is very suitable for experiments with lenses, prisms and optical gratings. The light source itself is a small festoon lamp with the filament aligned with the supporting rod making it easy to position on an optical bench. The long, narrow filament is ideal for perfor ...
... This simple, high intensity light is very suitable for experiments with lenses, prisms and optical gratings. The light source itself is a small festoon lamp with the filament aligned with the supporting rod making it easy to position on an optical bench. The long, narrow filament is ideal for perfor ...
Far-field measurement of ultra-small plasmonic mode volume Shuang Zhang, Yong-Shik Park,
... Among various plasmonic designs, optical nano-antennas are of special interest since they are capable of focusing light into a small gap region with nanometer scales in all three dimensions, and can be tailored to operate at various frequency bands [3–7]. Besides their usual antenna functionalities ...
... Among various plasmonic designs, optical nano-antennas are of special interest since they are capable of focusing light into a small gap region with nanometer scales in all three dimensions, and can be tailored to operate at various frequency bands [3–7]. Besides their usual antenna functionalities ...
Far-field measurement of ultra-small plasmonic mode volume Shuang Zhang, Yong-Shik Park,
... Among various plasmonic designs, optical nano-antennas are of special interest since they are capable of focusing light into a small gap region with nanometer scales in all three dimensions, and can be tailored to operate at various frequency bands [3–7]. Besides their usual antenna functionalities ...
... Among various plasmonic designs, optical nano-antennas are of special interest since they are capable of focusing light into a small gap region with nanometer scales in all three dimensions, and can be tailored to operate at various frequency bands [3–7]. Besides their usual antenna functionalities ...
Soliton collision and Raman gain regimes in continuous
... it propagates through the medium. Photonic crystal fibers (PCFs) are often used as the nonlinear medium, not only because the silica core confining the light can be made very small, thus increasing the intensity of the light, but also because the dispersion properties of these fibers are highly cont ...
... it propagates through the medium. Photonic crystal fibers (PCFs) are often used as the nonlinear medium, not only because the silica core confining the light can be made very small, thus increasing the intensity of the light, but also because the dispersion properties of these fibers are highly cont ...
Laser Systems for Inverse Compton Scattering Gamma
... drive laser, which can significantly reduce the requirements on the interaction drive laser average power. One of the most important laser design parameters is the beam quality that is instrumental to beam focusing and efficient production of gamma-rays by IGS. Since the beam quality is affected by ...
... drive laser, which can significantly reduce the requirements on the interaction drive laser average power. One of the most important laser design parameters is the beam quality that is instrumental to beam focusing and efficient production of gamma-rays by IGS. Since the beam quality is affected by ...
Reflectivity of Nonlinear Apodized Chirped Fiber Bragg Grating Under Water
... from 0 to 10 MPa. One can predict that the increase in the reflectivity that results from the pressure will approximately cancel the temperature effect. Table III shows a comparison between the maximum reflectivity at the sea level and at 1 km ocean depth in the linear and nonlinear cases for all ap ...
... from 0 to 10 MPa. One can predict that the increase in the reflectivity that results from the pressure will approximately cancel the temperature effect. Table III shows a comparison between the maximum reflectivity at the sea level and at 1 km ocean depth in the linear and nonlinear cases for all ap ...
Markov chain model in maximum-likelihood sequence detection for
... per-survivor processing (PSP). We use simulations to investigate the accuracy of the SMC model and the effectiveness of the suboptimal MLSD techniques. The remainder of this paper is organized as follows. In Section II, we first review the correlation of signal fading and the probability distributio ...
... per-survivor processing (PSP). We use simulations to investigate the accuracy of the SMC model and the effectiveness of the suboptimal MLSD techniques. The remainder of this paper is organized as follows. In Section II, we first review the correlation of signal fading and the probability distributio ...
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... interaction of the light and material unavoidably results in refractive index changes that are confined to the laser beam focus volume. This local confinement of the index change can be a drawback, as a small lateral shift of the focal point can displace the inscribed grating from the fiber axis, re ...
... interaction of the light and material unavoidably results in refractive index changes that are confined to the laser beam focus volume. This local confinement of the index change can be a drawback, as a small lateral shift of the focal point can displace the inscribed grating from the fiber axis, re ...
Viscosity dependence of optical limiting in carbon black
... CBS兾ethanol we observe the same behavior as in CBS兾water, however, the turnover appears at lower input energy 共Ein ⬇ 75 J兲. This result is consistent with Eq. 共1兲, where, as the viscosity of the liquid increases, the diffusion of spherical particles decreases. Other solvent thermodynamic parameters ...
... CBS兾ethanol we observe the same behavior as in CBS兾water, however, the turnover appears at lower input energy 共Ein ⬇ 75 J兲. This result is consistent with Eq. 共1兲, where, as the viscosity of the liquid increases, the diffusion of spherical particles decreases. Other solvent thermodynamic parameters ...
Generation of a dark hollow beam by a four
... the DHBs has many advantages [7], such as a smaller dark spot size, a minimal light shift of atomic internal levels, a lower photon-scattering rate, a lower atomic loss rate from photon-assisted collisions, a higher intensity gradient and so on, it would be interesting and worthwhile to generate som ...
... the DHBs has many advantages [7], such as a smaller dark spot size, a minimal light shift of atomic internal levels, a lower photon-scattering rate, a lower atomic loss rate from photon-assisted collisions, a higher intensity gradient and so on, it would be interesting and worthwhile to generate som ...
Superprism phenomena in planar photonic crystals
... Kosaka’s and Lin’s results is in the physical understanding of the angular dispersion phenomenon. Kosaka et al. recognized the anisotropy in the dispersion relationship and determined the light propagation direction via the group velocity, using wavevector diagrams discussed in detail by Russel [10] ...
... Kosaka’s and Lin’s results is in the physical understanding of the angular dispersion phenomenon. Kosaka et al. recognized the anisotropy in the dispersion relationship and determined the light propagation direction via the group velocity, using wavevector diagrams discussed in detail by Russel [10] ...
Components of Optical Networks
... ! Raman amplifiers (using the Raman scattering non-linear effect. Needs laser pump source but it can be used al all bands). ! Semiconductor optical amplifiers (earlier technology, using p-n junctions of semiconductors to amplify light. No pump source is needed). ...
... ! Raman amplifiers (using the Raman scattering non-linear effect. Needs laser pump source but it can be used al all bands). ! Semiconductor optical amplifiers (earlier technology, using p-n junctions of semiconductors to amplify light. No pump source is needed). ...
High speed silicon based optical modulators based on carrier
... and photodetectors are needed. The use of silicon-on-insulator (SOI) substrates for silicon-based photonics and optoelectronics presents several advantages. SOI is compatible with low cost CMOS technology and large wafer diameters up to 300 mm are commercially available. Another advantage is the str ...
... and photodetectors are needed. The use of silicon-on-insulator (SOI) substrates for silicon-based photonics and optoelectronics presents several advantages. SOI is compatible with low cost CMOS technology and large wafer diameters up to 300 mm are commercially available. Another advantage is the str ...
Laser tweezers and their applications
... that light has and the pressure that this allows it to exert, as it pushes the tail of a comet away from the sun. Now with the assistance of gradient forces, this "pushing" quality of light (and other radiation) has been extended to pulling and twisting of invisible objects in just the past twenty-f ...
... that light has and the pressure that this allows it to exert, as it pushes the tail of a comet away from the sun. Now with the assistance of gradient forces, this "pushing" quality of light (and other radiation) has been extended to pulling and twisting of invisible objects in just the past twenty-f ...
Whispering gallery modes of microspheres in the presence of a
... Therefore, for a given laser wavelength and coupling angle, the total optical path length for the round trip of the light is somewhat different from 2Rn1 and is a function of the refractive index of the surrounding medium, n2. By tracking the WGM shifts induced by perturbations in n2, the surroundi ...
... Therefore, for a given laser wavelength and coupling angle, the total optical path length for the round trip of the light is somewhat different from 2Rn1 and is a function of the refractive index of the surrounding medium, n2. By tracking the WGM shifts induced by perturbations in n2, the surroundi ...
Optical forces through guided light deflections
... selection and antireflection coatings [18,19] or optically driven motors based on birefringence or light scattering [20–23]. In this work we bring focus to the object shaping aspects of optimizing the mechanical effects of optical fields. We demonstrated in a recent work the optical manipulation of ...
... selection and antireflection coatings [18,19] or optically driven motors based on birefringence or light scattering [20–23]. In this work we bring focus to the object shaping aspects of optimizing the mechanical effects of optical fields. We demonstrated in a recent work the optical manipulation of ...
Flat optics with designer metasurfaces
... phase associated with Fig. 4) are able to extend the phase response to cover the entire 2π range, which is necessary for a complete control of the wavefront. For example, in Fig. 1c the unit cell of the metasurface consisting of eight antennas produces a phase shift of the scattered light that incre ...
... phase associated with Fig. 4) are able to extend the phase response to cover the entire 2π range, which is necessary for a complete control of the wavefront. For example, in Fig. 1c the unit cell of the metasurface consisting of eight antennas produces a phase shift of the scattered light that incre ...
Department of Physics, Technical University Ostrava 17. listopadu
... Received 20 September 2004, in final form 1 April 2005, accepted 4 April 2005 A spectral-domain white-light interferometric technique of measuring the effective thickness of optical elements of known dispersion is presented when a Michelson interferometer with a cube beam splitter is not dispersion ...
... Received 20 September 2004, in final form 1 April 2005, accepted 4 April 2005 A spectral-domain white-light interferometric technique of measuring the effective thickness of optical elements of known dispersion is presented when a Michelson interferometer with a cube beam splitter is not dispersion ...
1.9 W yellow, CW, high-brightness light from a high efficiency
... and one for the tapered amplifier section. A distributed Bragg reflector (DBR) section at the end of the ridge waveguide section ensures single frequency operation. The emission from the laser diode is collimated in the fast axis with an aspheric lens, refocusing the slow axis. The slow axis is then ...
... and one for the tapered amplifier section. A distributed Bragg reflector (DBR) section at the end of the ridge waveguide section ensures single frequency operation. The emission from the laser diode is collimated in the fast axis with an aspheric lens, refocusing the slow axis. The slow axis is then ...
Electron beam lithography designed silver nano
... EBL, on the other hand, is a modified SEM system that has superior properties compared to other optical or chemical patterning techniques, such as the precise placement and design of arbitrarily shaped NPs with a large selection of geometries of various sizes with fine features. It offers a high res ...
... EBL, on the other hand, is a modified SEM system that has superior properties compared to other optical or chemical patterning techniques, such as the precise placement and design of arbitrarily shaped NPs with a large selection of geometries of various sizes with fine features. It offers a high res ...
Fiber-optic communication
Fiber-optic communication is a method of transmitting information from one place to another by sending pulses of light through an optical fiber. The light forms an electromagnetic carrier wave that is modulated to carry information. First developed in the 1970s, fiber-optic communication systems have revolutionized the telecommunications industry and have played a major role in the advent of the Information Age. Because of its advantages over electrical transmission, optical fibers have largely replaced copper wire communications in core networks in the developed world. Optical fiber is used by many telecommunications companies to transmit telephone signals, Internet communication, and cable television signals. Researchers at Bell Labs have reached internet speeds of over 100 petabit×kilometer per second using fiber-optic communication.The process of communicating using fiber-optics involves the following basic steps: Creating the optical signal involving the use of a transmitter, relaying the signal along the fiber, ensuring that the signal does not become too distorted or weak, receiving the optical signal, and converting it into an electrical signal.