MEMS Corner Cube Retroreflectors for Free-Space
... performance of an ideal CCR as well as one with non-ideal characteristics. This allows the designer to determine specifications for the CCRs in order to meet the system requirements. This paper also presents the design issues relevant to fabricating CCRs in the commercial MCNC MUMPS process. The des ...
... performance of an ideal CCR as well as one with non-ideal characteristics. This allows the designer to determine specifications for the CCRs in order to meet the system requirements. This paper also presents the design issues relevant to fabricating CCRs in the commercial MCNC MUMPS process. The des ...
Optical Fiber Sensors for Biomedical Applications
... indices of the fiber material (core n1 , and cladding n2 ), but is also dependent on the refractive index of the surrounding environment n0 . As such, compared to an air environment (n0 =1), the acceptance angle will be correspondingly smaller in water (n0 =1.33). The NA of an optical fiber characte ...
... indices of the fiber material (core n1 , and cladding n2 ), but is also dependent on the refractive index of the surrounding environment n0 . As such, compared to an air environment (n0 =1), the acceptance angle will be correspondingly smaller in water (n0 =1.33). The NA of an optical fiber characte ...
Wave-mixing solitons in ferroelectric crystals
... obtained for the description of four wave-mixing in transmission geometry, it describes self-diffraction of the wave from shifted gratings as well. The sine-Gordon equation governs the soliton propagation. • The photoinduced amplitude of the refractive-index grating exhibits also a soliton shape in ...
... obtained for the description of four wave-mixing in transmission geometry, it describes self-diffraction of the wave from shifted gratings as well. The sine-Gordon equation governs the soliton propagation. • The photoinduced amplitude of the refractive-index grating exhibits also a soliton shape in ...
Modeling and simulation of surface profile forming process of
... adds the complexity of the device, especially for array structure. In addition, they are normally fabricated piece by piece, not very suitable for batch fabrication. UV lithography of SU-8 has been widely used in MEMS and MOEMS in recent years. Cured SU-8 polymer has very good optical and mechanical ...
... adds the complexity of the device, especially for array structure. In addition, they are normally fabricated piece by piece, not very suitable for batch fabrication. UV lithography of SU-8 has been widely used in MEMS and MOEMS in recent years. Cured SU-8 polymer has very good optical and mechanical ...
00800001a2_9.pdf
... 1690 Huygens put forward the basis for the theory we use today. In 1801, Thomas Young performed a fundamental experiment for demonstrating interference and the wave nature of light, see Fig. 9.1.26. He used monochromatic light passing a single pinhole first and subsequently traveling to two separated ...
... 1690 Huygens put forward the basis for the theory we use today. In 1801, Thomas Young performed a fundamental experiment for demonstrating interference and the wave nature of light, see Fig. 9.1.26. He used monochromatic light passing a single pinhole first and subsequently traveling to two separated ...
Light at work: The use of optical forces for particle manipulation
... experiments it is in the range of tens of fN up to tens of pN. Typical applications of OT involve dielectric particles (e.g. polystyrene or silica) with sizes in the so-called Mie regime (from 200 nm to 7 mm) or living cells. However, spatial manipulation of nanoobjects (including metallic ones) wi ...
... experiments it is in the range of tens of fN up to tens of pN. Typical applications of OT involve dielectric particles (e.g. polystyrene or silica) with sizes in the so-called Mie regime (from 200 nm to 7 mm) or living cells. However, spatial manipulation of nanoobjects (including metallic ones) wi ...
Self-assembly of three-dimensional photonic-crystals with
... do not have a full photonic bandgap because of their low index contrast, the self-assembled colloidal crystals provide an ideal template for the creation of porous structures with a full photonic bandgap by infiltration of the template by a material of high refractive index and then removal of the t ...
... do not have a full photonic bandgap because of their low index contrast, the self-assembled colloidal crystals provide an ideal template for the creation of porous structures with a full photonic bandgap by infiltration of the template by a material of high refractive index and then removal of the t ...
A very convenient setup to generate intense VUV coherent light at
... (ii) On the contrary, sum generation at 125.053 nm corresponds to a region of negative dispersion. It may provide a straightforward example to check, experimentally and theoretically various parameters of F W SF M processes which can be optimized to yield the maximum attainable conversion efficiency. ...
... (ii) On the contrary, sum generation at 125.053 nm corresponds to a region of negative dispersion. It may provide a straightforward example to check, experimentally and theoretically various parameters of F W SF M processes which can be optimized to yield the maximum attainable conversion efficiency. ...
Three-Dimensional Simulation of Vertical-Cavity Surface
... vertical direction in the following) is much shorter than in edge-emitters: only few tens or nanometers or less, mirrors with very high reflectivity are required for the optical feedback. Usual reflectivity coefficients should exceed 99% on the output side and 99.9% on the back part. Such mirrors can be ...
... vertical direction in the following) is much shorter than in edge-emitters: only few tens or nanometers or less, mirrors with very high reflectivity are required for the optical feedback. Usual reflectivity coefficients should exceed 99% on the output side and 99.9% on the back part. Such mirrors can be ...
1.5 MB
... positive or negative topological charge. The question of topological charge is more complicated than it is usually referred to in literature. Short discussion on this matter may be found in [5]. Generally, singular lines may have complicated geometry [6 – 8]. In Fig. 2 versors n(s) are unit vectors ...
... positive or negative topological charge. The question of topological charge is more complicated than it is usually referred to in literature. Short discussion on this matter may be found in [5]. Generally, singular lines may have complicated geometry [6 – 8]. In Fig. 2 versors n(s) are unit vectors ...
LINEAR AND NONLINEAR LIGHT BULLETS: RECENT
... optical media (common second-harmonic generation materials) that support stable (robust) optical solitons regardless the physical dimension in which they form and propagate [10]-[13]. In a seminal experimental study published in 1999 by the group of F. W. Wise at Cornell University [14], formation o ...
... optical media (common second-harmonic generation materials) that support stable (robust) optical solitons regardless the physical dimension in which they form and propagate [10]-[13]. In a seminal experimental study published in 1999 by the group of F. W. Wise at Cornell University [14], formation o ...
Plane-wave scattering by a set of perfectly conducting circular
... vacuum-dielectric interface.24 Furthermore, for the case of a single cylinder in front of an interface, the problem has been approached with various techniques.25–30 When the surface coincides with the interface between vacuum and a dielectric homogeneous medium or when it is a real conducting plane ...
... vacuum-dielectric interface.24 Furthermore, for the case of a single cylinder in front of an interface, the problem has been approached with various techniques.25–30 When the surface coincides with the interface between vacuum and a dielectric homogeneous medium or when it is a real conducting plane ...
Semiperiodicity versus periodicity for ultra broadband optical
... back (and front) grating are introduced into a supercell, where the latter is assumed to be large enough to reproduce the spectral characteristics of the semiperiodic grating structure. The simulation then analyzes the optical absorption in the active layer yielding its spectrally integrated version ...
... back (and front) grating are introduced into a supercell, where the latter is assumed to be large enough to reproduce the spectral characteristics of the semiperiodic grating structure. The simulation then analyzes the optical absorption in the active layer yielding its spectrally integrated version ...
Mode-Matching Analysis of Whispering-Gallery
... mimic of the whispering gallery, named as whispering gallery mode (WGM) microcavity, has emerged as a powerful photonic device since last centaury [2, 3, 4, 5]. In an optical WGM microcavity, photons circulate along the cavity edge. When the round trip time the photon travels coincides with an integ ...
... mimic of the whispering gallery, named as whispering gallery mode (WGM) microcavity, has emerged as a powerful photonic device since last centaury [2, 3, 4, 5]. In an optical WGM microcavity, photons circulate along the cavity edge. When the round trip time the photon travels coincides with an integ ...
Atom-Wall interaction
... Lambrecht and Reynaud, 2003), that stimulate new developments in the theory, notably justifying studies at various distance ranges, or consideration of material dispersion effects and thermal effects. An elementary situation for this interaction between two bodies is the restriction to the interacti ...
... Lambrecht and Reynaud, 2003), that stimulate new developments in the theory, notably justifying studies at various distance ranges, or consideration of material dispersion effects and thermal effects. An elementary situation for this interaction between two bodies is the restriction to the interacti ...
Physics Research A
... The absorption lengths from HERMES, denoted by Labs;2, and the fit values T fit;2 and Lsc;2 from the second fit are listed in Table 1. 3.2. Optical properties of the reflector foil The reflector foil is a 0.5 mm thick Whitestar Gore-Tex membrane. The reflectivity R of this diffusely reflecting foil is ver ...
... The absorption lengths from HERMES, denoted by Labs;2, and the fit values T fit;2 and Lsc;2 from the second fit are listed in Table 1. 3.2. Optical properties of the reflector foil The reflector foil is a 0.5 mm thick Whitestar Gore-Tex membrane. The reflectivity R of this diffusely reflecting foil is ver ...
Micro-Displacement Sensor Based on a Hollow
... high light/sample overlapping [1,2]. These advantages lead to fascinating applications based on HC-PCFs, such as gas sensing [3], rhodamine sensing [4], DNA sensing [5], particle guidance and levitation [6], among others. However, hollow-core PCFs present the disadvantage of supporting multiple mode ...
... high light/sample overlapping [1,2]. These advantages lead to fascinating applications based on HC-PCFs, such as gas sensing [3], rhodamine sensing [4], DNA sensing [5], particle guidance and levitation [6], among others. However, hollow-core PCFs present the disadvantage of supporting multiple mode ...
OPTIMISATION OF PHOTONIC CRYSTAL WAVEGUIDE BASED OPTICAL FILTER
... or the multilayer dielectric mirror such as the quarter wave stack. In these devices, light wave at each interface is partially reflected and if the reflections from multiple interfaces interfere destructively, it would eliminate the forward propagating wave. On the other hand, if the interference i ...
... or the multilayer dielectric mirror such as the quarter wave stack. In these devices, light wave at each interface is partially reflected and if the reflections from multiple interfaces interfere destructively, it would eliminate the forward propagating wave. On the other hand, if the interference i ...
Anti-reflective coating
An antireflective or anti-reflection (AR) coating is a type of optical coating applied to the surface of lenses and other optical elements to reduce reflection. In typical imaging systems, this improves the efficiency since less light is lost. In complex systems such as a telescope, the reduction in reflections also improves the contrast of the image by elimination of stray light. This is especially important in planetary astronomy. In other applications, the primary benefit is the elimination of the reflection itself, such as a coating on eyeglass lenses that makes the eyes of the wearer more visible to others, or a coating to reduce the glint from a covert viewer's binoculars or telescopic sight.Many coatings consist of transparent thin film structures with alternating layers of contrasting refractive index. Layer thicknesses are chosen to produce destructive interference in the beams reflected from the interfaces, and constructive interference in the corresponding transmitted beams. This makes the structure's performance change with wavelength and incident angle, so that color effects often appear at oblique angles. A wavelength range must be specified when designing or ordering such coatings, but good performance can often be achieved for a relatively wide range of frequencies: usually a choice of IR, visible, or UV is offered.