Chapter One: An Introduction to Nonlinear Optics, Second Order
... The use of specially tailored chromophores with large hyperpolarizabilities is one approach to achieve this end. A possibility for decreasing the average chromophore tilt angle (thus increasing nonlinearity) lies in complexing the polymer chromophores with cyclodextrins, forming pseudorotaxanes. Our ...
... The use of specially tailored chromophores with large hyperpolarizabilities is one approach to achieve this end. A possibility for decreasing the average chromophore tilt angle (thus increasing nonlinearity) lies in complexing the polymer chromophores with cyclodextrins, forming pseudorotaxanes. Our ...
Simplified description of optical forces acting on a nanoparticle in
... for very small particles—so-called Rayleigh particles— whose radius fulfils a ⭐ /20, where is the trapping wavelength in the medium.21,22 Such a small particle behaves as an induced elementary dipole, and the optical forces acting on it can be divided into two components, gradient and scattering ...
... for very small particles—so-called Rayleigh particles— whose radius fulfils a ⭐ /20, where is the trapping wavelength in the medium.21,22 Such a small particle behaves as an induced elementary dipole, and the optical forces acting on it can be divided into two components, gradient and scattering ...
to - UCL Medical Physics and Biomedical Engineering
... sensitivity to detect the very weak acoustic signals generated at depth in the tissue. For high resolution applications where acoustic frequency components of several tens of MHz can be generated, this requires element sizes and interelement spacing of the order of 50µm and wideband detection sensit ...
... sensitivity to detect the very weak acoustic signals generated at depth in the tissue. For high resolution applications where acoustic frequency components of several tens of MHz can be generated, this requires element sizes and interelement spacing of the order of 50µm and wideband detection sensit ...
Impact of Liquid Crystals in Active and Adaptive Optics
... the optical field. Additionally, due to its liquid like behavior, this relative orientation can be easily tuned by using electric, magnetic or optical fields [1-6], so anisotropy and tuning capability are the two main properties that make LCs so attractive. In the preceding paragraph we spoke about ...
... the optical field. Additionally, due to its liquid like behavior, this relative orientation can be easily tuned by using electric, magnetic or optical fields [1-6], so anisotropy and tuning capability are the two main properties that make LCs so attractive. In the preceding paragraph we spoke about ...
Palladium Ultra Thin Layer Profiles Evaluation by Evanescent Light
... investigate nanostructures profiles of Pd sputtered thin films in the ultra-thin thickness range of 1 - 10 nm [1]. DELI is an optical evanescent waves microscopy technique based on capturing the light extracted by nano layers deposited on a substrate which also serves as a waveguide [2,3]. The DELI ...
... investigate nanostructures profiles of Pd sputtered thin films in the ultra-thin thickness range of 1 - 10 nm [1]. DELI is an optical evanescent waves microscopy technique based on capturing the light extracted by nano layers deposited on a substrate which also serves as a waveguide [2,3]. The DELI ...
Single-Mode Photonic Band Gap Guidance of Light in Air
... allow transmission of wavelengths and power levels not possible in conventional fibers, and will lead to greatly increased threshold powers for stimulated Raman, Brillouin, and color-center effects. On the other hand, if the hollow core is deliberately filled with a gas, vapor, or lowindex liquid, v ...
... allow transmission of wavelengths and power levels not possible in conventional fibers, and will lead to greatly increased threshold powers for stimulated Raman, Brillouin, and color-center effects. On the other hand, if the hollow core is deliberately filled with a gas, vapor, or lowindex liquid, v ...
Optical field profile evaluation on silica high Optical field profile
... Breathe sensing system that incorporates waveguide gas cells has been proved to be handy for performing daily breath checks. One critical issue for high-sensitivity breath sensing has been high propagation loss. We previously proposed the utilization of a silica high-mesa waveguide due to its low pr ...
... Breathe sensing system that incorporates waveguide gas cells has been proved to be handy for performing daily breath checks. One critical issue for high-sensitivity breath sensing has been high propagation loss. We previously proposed the utilization of a silica high-mesa waveguide due to its low pr ...
Optical trapping using cascade conical refraction of light
... of sophistication in the geometry of the optical trap since beams can be produced and altered using a wide range of optical devices. Various trap arrangements have been studied in which optical orbital angular momentum, in addition to linear optical momentum, is used to manipulate microscopic object ...
... of sophistication in the geometry of the optical trap since beams can be produced and altered using a wide range of optical devices. Various trap arrangements have been studied in which optical orbital angular momentum, in addition to linear optical momentum, is used to manipulate microscopic object ...
The Phase element .1
... The same structure may act as an Optical Amplifier, provided: Upper metal ...
... The same structure may act as an Optical Amplifier, provided: Upper metal ...
Mode Conversion/Splitting by Optical Analogy of Multistate
... gation direction. The fabrication of binary CGPH as surface relief patterns with fixed etch depth has been reported elsewhere [15], [24]. To fabricate the adiabatically varying etch depth in the proposed devices, grayscale lithography, such as the one reported for the fabrication of three-dimensiona ...
... gation direction. The fabrication of binary CGPH as surface relief patterns with fixed etch depth has been reported elsewhere [15], [24]. To fabricate the adiabatically varying etch depth in the proposed devices, grayscale lithography, such as the one reported for the fabrication of three-dimensiona ...
PDF - Photonics Research Group
... sizes require minimized specific contact resistances to obtain high speed and low power consumption. Secondly, in a photonic membrane, which is typically below one micron thick, the guided optical modes can be very close to the metal contacts on top, thereby resulting in higher optical losses. Tradi ...
... sizes require minimized specific contact resistances to obtain high speed and low power consumption. Secondly, in a photonic membrane, which is typically below one micron thick, the guided optical modes can be very close to the metal contacts on top, thereby resulting in higher optical losses. Tradi ...
The Impact of Computers on the Design and Manufacture of Optical
... tedious to apply when problems needed to be specified at many wavelengths and were at the same time complex enough to require a larger number of layers for their solution. Also, the monitoring of the thicknesses of non-quarter wave layers was difficult then. Philip Baumeister’s 1958 paper in which h ...
... tedious to apply when problems needed to be specified at many wavelengths and were at the same time complex enough to require a larger number of layers for their solution. Also, the monitoring of the thicknesses of non-quarter wave layers was difficult then. Philip Baumeister’s 1958 paper in which h ...
Optical interconnection technology in switches, routers, and optical
... telecommunication equipment, is parallel and distributed computing systems [8-11]. Important work in the field of optical interconnections in computing and communications started in the mid 1980s. Of the early publications, a good paper on system aspects was published by Goodman et al. in 1984 [12], ...
... telecommunication equipment, is parallel and distributed computing systems [8-11]. Important work in the field of optical interconnections in computing and communications started in the mid 1980s. Of the early publications, a good paper on system aspects was published by Goodman et al. in 1984 [12], ...
Ultralow-Noise SiN Trampoline Resonators for
... falls outside the structure. Consistent with recent simulations [19], we find that the majority of this “clipped” light is, in many cases, recovered by the cavity. II. MECHANICAL PROPERTIES Drawing inspiration from similar structures [20], those having embedded Bragg mirrors [21,22], and high-Qm nit ...
... falls outside the structure. Consistent with recent simulations [19], we find that the majority of this “clipped” light is, in many cases, recovered by the cavity. II. MECHANICAL PROPERTIES Drawing inspiration from similar structures [20], those having embedded Bragg mirrors [21,22], and high-Qm nit ...
Design of illumination and projection optics for projectors with single
... DMD. As shown in Fig. 3, the prism system comprises three transparent prisms, between which there are two air gaps. Total internal reflection 共TIR兲 at the interface between the prism and the air gap is utilized to separate the light bundles by angle. The advantage of the light separation by TIR is t ...
... DMD. As shown in Fig. 3, the prism system comprises three transparent prisms, between which there are two air gaps. Total internal reflection 共TIR兲 at the interface between the prism and the air gap is utilized to separate the light bundles by angle. The advantage of the light separation by TIR is t ...
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.