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High refractive index Fresnel lens on a fiber fabricated by
... [11], but it also enables patterning of functional high refractive index materials, as previously demonstrated by our group and others [12-14]. Here, we demonstrate the fabrication of a Fresnel lens on a fiber by NIL of an imprint polymer [15] with a refractive index of 1.69 at 590 nm. We also demon ...
... [11], but it also enables patterning of functional high refractive index materials, as previously demonstrated by our group and others [12-14]. Here, we demonstrate the fabrication of a Fresnel lens on a fiber by NIL of an imprint polymer [15] with a refractive index of 1.69 at 590 nm. We also demon ...
All-dielectric subwavelength metasurface focusing lens
... smooth radial dependence of phase increment on transmission, avoiding 2π phase steps. Quasi-parabolic radial gradients of phase along the surface were created by slow variation of geometric parameters of the fine pattern. The meta-surface thickness is approximately onethird of the free-space wavelen ...
... smooth radial dependence of phase increment on transmission, avoiding 2π phase steps. Quasi-parabolic radial gradients of phase along the surface were created by slow variation of geometric parameters of the fine pattern. The meta-surface thickness is approximately onethird of the free-space wavelen ...
self-study - Technion moodle
... InGaAsP semiconductor lasers. Although these systems were initially limited by dispersion, in 1981 the single-mode fiber was revealed to greatly improve system performance. By 1987, these systems were operating at bit rates of up to 1.7 Gb/s with repeater spacing up to 50 km. ...
... InGaAsP semiconductor lasers. Although these systems were initially limited by dispersion, in 1981 the single-mode fiber was revealed to greatly improve system performance. By 1987, these systems were operating at bit rates of up to 1.7 Gb/s with repeater spacing up to 50 km. ...
An ultrasmall wavelength-selective channel drop switch
... We propose a nanomechanical channel drop switch by controlling the submicron distance between a nanocavity and photonic crystal 共PC兲 waveguide with an ultrasmall electrostatic comb actuator. Light propagating in the PC waveguide is coupled with a nanocavity and emitted as a drop signal under a reson ...
... We propose a nanomechanical channel drop switch by controlling the submicron distance between a nanocavity and photonic crystal 共PC兲 waveguide with an ultrasmall electrostatic comb actuator. Light propagating in the PC waveguide is coupled with a nanocavity and emitted as a drop signal under a reson ...
introduction - Academic Science,International Journal of Computer
... Rudziński [13] analyzed electromagnetic wave propagation inside 1D photonic crystal for both TE and TM mode using transfer matrix technique. Jiang [12] calculated the transmission property due to resonant tunneling between the quantized states, experimentally confirmed by Xu [14] at lower wavelength ...
... Rudziński [13] analyzed electromagnetic wave propagation inside 1D photonic crystal for both TE and TM mode using transfer matrix technique. Jiang [12] calculated the transmission property due to resonant tunneling between the quantized states, experimentally confirmed by Xu [14] at lower wavelength ...
Towards resonant-state THz laser based on strained p
... Vertical transport in short-period InAs/AlSb and GaAs/AlAs superlattices (SLs) was studied. The periodic maxima observed in the current-voltage characteristics of these SLs in the nonresonant tunneling regime were attributed to the influence of optical cavity on optical transitions within quantum we ...
... Vertical transport in short-period InAs/AlSb and GaAs/AlAs superlattices (SLs) was studied. The periodic maxima observed in the current-voltage characteristics of these SLs in the nonresonant tunneling regime were attributed to the influence of optical cavity on optical transitions within quantum we ...
Slide 1
... Non Linear Dispersive Fiber Purpose The module solves the nonlinear Schrödinger (NLS) equation describing the propagation of linearly polarized optical waves in fibers using the split-step Fourier method. The model takes into account stimulated Raman scattering (SRS), four-wave mixing (FWM), self-p ...
... Non Linear Dispersive Fiber Purpose The module solves the nonlinear Schrödinger (NLS) equation describing the propagation of linearly polarized optical waves in fibers using the split-step Fourier method. The model takes into account stimulated Raman scattering (SRS), four-wave mixing (FWM), self-p ...
N - Purdue Physics
... • The only physical concepts we applied were – Snell’s law: sin – Law of reflection: ...
... • The only physical concepts we applied were – Snell’s law: sin – Law of reflection: ...
n 1n d
... • Photopolymerization-induced phase separation of the constituent components in H-PDLCs causes a huge variation of refractive index for light as well as for neutrons. • H-PDLC transmission gratings with the thickness of only few tens of micrometers act as extremely efficient gratings for neutrons. • ...
... • Photopolymerization-induced phase separation of the constituent components in H-PDLCs causes a huge variation of refractive index for light as well as for neutrons. • H-PDLC transmission gratings with the thickness of only few tens of micrometers act as extremely efficient gratings for neutrons. • ...
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 ...
Optical Micrometer
... Optical Micrometer The light source for this experiment is a low-power helium-neon laser with a wavelength of 632.8 nm. Never look directly at a laser beam nor permit anyone else to do so! Exposure to the direct or reflected beam for more than a few seconds will cause serious eye damage. Do not pick ...
... Optical Micrometer The light source for this experiment is a low-power helium-neon laser with a wavelength of 632.8 nm. Never look directly at a laser beam nor permit anyone else to do so! Exposure to the direct or reflected beam for more than a few seconds will cause serious eye damage. Do not pick ...
Adiabatic far-field sub-diffraction imaging ARTICLE Hu Cang *, Alessandro Salandrino
... in the upper hemisphere. As the surface plasmon waves originated from an object in the gap region propagate along the curved interface, from the gap to the upper hemisphere, they experience adiabatic decompression; the effective wavelength continuously increases from single nanometres in the gap reg ...
... in the upper hemisphere. As the surface plasmon waves originated from an object in the gap region propagate along the curved interface, from the gap to the upper hemisphere, they experience adiabatic decompression; the effective wavelength continuously increases from single nanometres in the gap reg ...
Fabrication of concave silicon micro-mirrors
... There have been several techniques reported to fabricate concave mirrors on different materials. These include diffusion of ion dopants on glass [4], melting photoresist disks to obtain a spherical shape followed by dry etching on GaAs [10] and trapping of air bubbles in borosilicate glass [6]. Fabr ...
... There have been several techniques reported to fabricate concave mirrors on different materials. These include diffusion of ion dopants on glass [4], melting photoresist disks to obtain a spherical shape followed by dry etching on GaAs [10] and trapping of air bubbles in borosilicate glass [6]. Fabr ...
Characterization of Thin Films (2)
... Characterizing Optical Thin Films (II) This is a follow up article to the first article [1] in which we developed the mathematical tools to determine the optical properties of optical thin film materials from the measured spectral data for a single layer coating. In the previous article we also demo ...
... Characterizing Optical Thin Films (II) This is a follow up article to the first article [1] in which we developed the mathematical tools to determine the optical properties of optical thin film materials from the measured spectral data for a single layer coating. In the previous article we also demo ...
Modulation instability for a relaxational Kerr medium Xue Liu , S.M. Shahriar
... (1+1)-dimensional NLSE demonstrates that the temporal soliton is a stable entity that the group velocity dispersion (GVD) is balanced by self-phase modulation (SPM) in the nonlinear Kerr medium, meaning that the index of refraction changes with the wave’s intensity [3]. The MI has been observed in m ...
... (1+1)-dimensional NLSE demonstrates that the temporal soliton is a stable entity that the group velocity dispersion (GVD) is balanced by self-phase modulation (SPM) in the nonlinear Kerr medium, meaning that the index of refraction changes with the wave’s intensity [3]. The MI has been observed in m ...
Lecture 11
... M matricies can be used to propagate either left to right or right to left (input to output or output to input). The output to input formulation is both a bit more numerically friendly, and much more useful if you want to explore the field distribution inside the dielectric stack. High reflectivity ...
... M matricies can be used to propagate either left to right or right to left (input to output or output to input). The output to input formulation is both a bit more numerically friendly, and much more useful if you want to explore the field distribution inside the dielectric stack. High reflectivity ...
Kerala University Optoelectronics Optical Communication
... OPE- 622 Optical Fiber Communication Systems Module I Classification of light wave systems, need for fiber based and all-optical systems. Impairments in fibers, dispersion types material (group velocity dispersion – GVD ), modal, wave guide and polarization mode dispersions(PMD). Attenuation : bend ...
... OPE- 622 Optical Fiber Communication Systems Module I Classification of light wave systems, need for fiber based and all-optical systems. Impairments in fibers, dispersion types material (group velocity dispersion – GVD ), modal, wave guide and polarization mode dispersions(PMD). Attenuation : bend ...
paper - Crescimanno page - Youngstown State University
... Wave impedance mismatches at boundaries typically excite reflected waves that reduce the efficiency of optical processes. Reducing impedance mismatch at a boundary using anti-reflection layers is limited by the inability to tune antireflection layers post-fabrication. Thus, in design, one must typic ...
... Wave impedance mismatches at boundaries typically excite reflected waves that reduce the efficiency of optical processes. Reducing impedance mismatch at a boundary using anti-reflection layers is limited by the inability to tune antireflection layers post-fabrication. Thus, in design, one must typic ...
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.