Surface Plasmon Engineering in Graphene Functionalized with
... is possible to adsorb molecules on graphene in desired patterns to produce point-by-point spatially tailored features. Figure 1 shows a schematic configuration of the proposed patterned graphene, using two types of molecules, that makes it possible to achieve any desired gradient index profile for the ...
... is possible to adsorb molecules on graphene in desired patterns to produce point-by-point spatially tailored features. Figure 1 shows a schematic configuration of the proposed patterned graphene, using two types of molecules, that makes it possible to achieve any desired gradient index profile for the ...
Guided-Wave Optical Biosensors
... immunity to electromagnetic interference, good compactness and robustness and high compatibility with fibre networks, but also because they usually exhibit shorter response time and higher sensitivities with respect to MEMS/MOEMS devices. Sensors used for biochemical applications (e.g. biomolecules ...
... immunity to electromagnetic interference, good compactness and robustness and high compatibility with fibre networks, but also because they usually exhibit shorter response time and higher sensitivities with respect to MEMS/MOEMS devices. Sensors used for biochemical applications (e.g. biomolecules ...
evanescent wave based biosensors
... A wave (called the refracted wave) also arises on the other side of the interface where the reflection occurs. The three arrows in the sketch at left represent the 3 wave vectors for the incident, reflected and refracted waves. All 3 wave vectors lie in the same plane (the plane of incidence). The a ...
... A wave (called the refracted wave) also arises on the other side of the interface where the reflection occurs. The three arrows in the sketch at left represent the 3 wave vectors for the incident, reflected and refracted waves. All 3 wave vectors lie in the same plane (the plane of incidence). The a ...
Two-dimensional modulational instability in photorefractive media M Saffman , Glen McCarthy
... crystal was illuminated by a broad white light beam which was used to control the degree of saturation. Typically, the peak intensity of the incident beam was of the same order as the average intensity of the white light background. We used either an unperturbed beam or a beam with superimposed weak ...
... crystal was illuminated by a broad white light beam which was used to control the degree of saturation. Typically, the peak intensity of the incident beam was of the same order as the average intensity of the white light background. We used either an unperturbed beam or a beam with superimposed weak ...
RAY OPTICS I
... Note that in Figure 6.2, we have drawn the rays as if the lens bends them suddenly at the exact center of the lens. Actually, each ray is bent a certain amount when it enters the lens and a certain amount more when it leaves the lens. If the lens is very thin compared to its focal length (or other i ...
... Note that in Figure 6.2, we have drawn the rays as if the lens bends them suddenly at the exact center of the lens. Actually, each ray is bent a certain amount when it enters the lens and a certain amount more when it leaves the lens. If the lens is very thin compared to its focal length (or other i ...
Open Frame CD/DVD Reader
... and plane wave fronts exist only at a particular point. The reason for the failure of geometrical optics is the fact that it has been introduced at a time where the wave character of light was still as unknown as the possibility to describe its behaviour by Maxwell‘s equations. To describe the propa ...
... and plane wave fronts exist only at a particular point. The reason for the failure of geometrical optics is the fact that it has been introduced at a time where the wave character of light was still as unknown as the possibility to describe its behaviour by Maxwell‘s equations. To describe the propa ...
optical coherence tomography
... Tomography is based on the reconstruction of cross-sectional images of an object from its projections. While the basic mathematics was described as early as 1917 by J. Radon,1 the implementation of this principle in medical imaging took a rather long time and led to a great number of configurations, ...
... Tomography is based on the reconstruction of cross-sectional images of an object from its projections. While the basic mathematics was described as early as 1917 by J. Radon,1 the implementation of this principle in medical imaging took a rather long time and led to a great number of configurations, ...
powerpoint
... Benefits of Reflecting Telescopes Less expensive. Only the front surface of the mirror must be ground. The glass doesn’t need to be perfectly Transparent The mirror can be supported over its back surface to reduce sagging. They do not suffer from chromatic aberration because the light is reflected ...
... Benefits of Reflecting Telescopes Less expensive. Only the front surface of the mirror must be ground. The glass doesn’t need to be perfectly Transparent The mirror can be supported over its back surface to reduce sagging. They do not suffer from chromatic aberration because the light is reflected ...
Tapered Fiber Fabrication
... are widely used in applied optics research. However, they are hard to obtain commercially and are fragile, making them difficult to transport. Therefore, to perform experiments with these fibers, it is advantageous for the laboratory to be able to fabricate its own tapered fibers. After this process ...
... are widely used in applied optics research. However, they are hard to obtain commercially and are fragile, making them difficult to transport. Therefore, to perform experiments with these fibers, it is advantageous for the laboratory to be able to fabricate its own tapered fibers. After this process ...
A Study on Rayleigh Backscattering Noise in Single Fiber
... Rayleigh scattering losses in optical fibers [7]. For pure silica glass an approximate equation for the Rayleigh scattering loss is given by this equation: ...
... Rayleigh scattering losses in optical fibers [7]. For pure silica glass an approximate equation for the Rayleigh scattering loss is given by this equation: ...
Real-Time Multicolor DNA Detection with Chemoresponsive
... In this equation, c is the speed of light, R is the absorptivity, and ω is the angular frequency of the incident light.20 It follows that if there is a change in absorptivity (in other words, a change in imaginary component of the refractive index), there will be a corresponding (via eq 3) change in ...
... In this equation, c is the speed of light, R is the absorptivity, and ω is the angular frequency of the incident light.20 It follows that if there is a change in absorptivity (in other words, a change in imaginary component of the refractive index), there will be a corresponding (via eq 3) change in ...
High-refractive-index composite materials for
... Bragg fiber with no absorption losses (f loss ¼ 0%) in the bilayers. This idealized configuration reveals 10 distinct bandgaps inside the 0:1–3:0 THz range, with the widest one being the fundamental bandgap located at 0:3 THz. For frequencies inside the bandgaps, light is tightly confined within the ...
... Bragg fiber with no absorption losses (f loss ¼ 0%) in the bilayers. This idealized configuration reveals 10 distinct bandgaps inside the 0:1–3:0 THz range, with the widest one being the fundamental bandgap located at 0:3 THz. For frequencies inside the bandgaps, light is tightly confined within the ...
Phase function
... – Arises from acoustic waves propagating through a medium and thus causes inhomogeneities of the R. I. – It can have either higher or lower frequencies because scattering particles are moving toward (or away from) the light source considered as an optical Doppler effect – This becomes important ...
... – Arises from acoustic waves propagating through a medium and thus causes inhomogeneities of the R. I. – It can have either higher or lower frequencies because scattering particles are moving toward (or away from) the light source considered as an optical Doppler effect – This becomes important ...
Overlay Network Andreas Holmqvist, Alexander Kronstrand Information Coding
... Nowadays, optical fiber is widely used in several areas, especially in communication networking. The main reason is that optical fiber has low attenuation and high bandwidth. However, the switching functionality is performed in the electrical domain (inside the router), thus we have transmission del ...
... Nowadays, optical fiber is widely used in several areas, especially in communication networking. The main reason is that optical fiber has low attenuation and high bandwidth. However, the switching functionality is performed in the electrical domain (inside the router), thus we have transmission del ...
Polarization of Light
... a wave plate, which is a device that introduces a relative phase between two components of the electric field. In this chapter, we will also see how reflection and transmission at a material interface influences field polarization. As we saw previously, s-polarized light can acquire a phase lag or p ...
... a wave plate, which is a device that introduces a relative phase between two components of the electric field. In this chapter, we will also see how reflection and transmission at a material interface influences field polarization. As we saw previously, s-polarized light can acquire a phase lag or p ...
Geometrical Optics 101: Paraxial Ray Tracing
... Ray Tracing Steps | Two Lens System | Ray Tracing Software Ray tracing is the primary method used by optical engineers to determine optical system performance. Ray tracing is the act of manually tracing a ray of light through a system by calculating the angle of refraction/reflection at each surface ...
... Ray Tracing Steps | Two Lens System | Ray Tracing Software Ray tracing is the primary method used by optical engineers to determine optical system performance. Ray tracing is the act of manually tracing a ray of light through a system by calculating the angle of refraction/reflection at each surface ...
Recent advances in transformation optics
... In fact, it has been long known that a spatially changing refractive index modifies light propagation characteristics. Based on the early work of the ancient Greek mathematician Hero of Alexandria (10–70 AD) and the Arab scientist Ibn al-Haytham (965–1040 AD), Pierre de Fermat formulated the famous ...
... In fact, it has been long known that a spatially changing refractive index modifies light propagation characteristics. Based on the early work of the ancient Greek mathematician Hero of Alexandria (10–70 AD) and the Arab scientist Ibn al-Haytham (965–1040 AD), Pierre de Fermat formulated the famous ...
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.