Optic Version of the Mach-Zehnder Interferometer
... one month fulltime on a particular research topic. Working at BS level imposes some restrictions on the choice of the topics for research, apart from the financial constraints that may be there. Below we report about a successful introduction of a fiber optic version of the Mach-Zehnder interferomet ...
... one month fulltime on a particular research topic. Working at BS level imposes some restrictions on the choice of the topics for research, apart from the financial constraints that may be there. Below we report about a successful introduction of a fiber optic version of the Mach-Zehnder interferomet ...
Role of the Tunneling Ray in Near-Critical-Angle
... pattern when two or more rays contribute to the wave field there. Other scattering structures, known as weak caustics, occur in ray theory when the scattered field is everywhere finite while its first derivative diverges on certain surfaces in the near and far zones.4 Again these divergences are smo ...
... pattern when two or more rays contribute to the wave field there. Other scattering structures, known as weak caustics, occur in ray theory when the scattered field is everywhere finite while its first derivative diverges on certain surfaces in the near and far zones.4 Again these divergences are smo ...
Aalborg Universitet
... well as to excite longitudinal plasmons. In our configuration, these effects imply that the reflectivity spectra for vanishingly small gap widths δ would still feature resonant oscillations somewhat similar to those obtained for non-zero gap widths δ, but with significantly damped oscillation amplit ...
... well as to excite longitudinal plasmons. In our configuration, these effects imply that the reflectivity spectra for vanishingly small gap widths δ would still feature resonant oscillations somewhat similar to those obtained for non-zero gap widths δ, but with significantly damped oscillation amplit ...
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... simulations. The process taking the expected image (think for example of a large metallic sphere) into the images produced by the LIDAR imaging systems is highly nonlinear, and even in the best case scenarios (see for example Figure 1) very different from the standard linear models of blurring and a ...
... simulations. The process taking the expected image (think for example of a large metallic sphere) into the images produced by the LIDAR imaging systems is highly nonlinear, and even in the best case scenarios (see for example Figure 1) very different from the standard linear models of blurring and a ...
design of optical light communication system: study the
... because of the following advantages like long life, unregulated huge bandwidth and not causing electromagnetic interference [2]. A part from the indoor wireless communications, OLC technology can also be applied in outdoor wireless optical communications [3–4] and other application such as the VLC b ...
... because of the following advantages like long life, unregulated huge bandwidth and not causing electromagnetic interference [2]. A part from the indoor wireless communications, OLC technology can also be applied in outdoor wireless optical communications [3–4] and other application such as the VLC b ...
Improvement of light quality by DBR structure in white LED
... Recently, white light-emitting diodes (LEDs) have become increasingly popular due to their compactness, long-lifetime and energy-saving features [1–4]. Generally, white LEDs were fabricated by putting a blue chip and yellow phosphor together. There were many crucial factors, including luminous effic ...
... Recently, white light-emitting diodes (LEDs) have become increasingly popular due to their compactness, long-lifetime and energy-saving features [1–4]. Generally, white LEDs were fabricated by putting a blue chip and yellow phosphor together. There were many crucial factors, including luminous effic ...
The Onset of Matter-Wave Amplification in a Superradiant Bose
... first case energy is conserved, the energy mismatch in the latter case is twice the recoil energy, ⌬E ⫽ 4បr. Therefore this process can only take place as long as the energy uncertainty ប/ ⬎ ⌬E, that is, for pulse lengths up to ⬃10 s. At an early stage, when the endfire modes do not yet dominat ...
... first case energy is conserved, the energy mismatch in the latter case is twice the recoil energy, ⌬E ⫽ 4បr. Therefore this process can only take place as long as the energy uncertainty ប/ ⬎ ⌬E, that is, for pulse lengths up to ⬃10 s. At an early stage, when the endfire modes do not yet dominat ...
Metamaterials at Optical Frequencies: Fabrication and Measurements
... Figure 3. Comparison between a conventional mask and a phase-shifting mask. The historical trend of integrated circuit minimum feature-size is shown in Figure 2. To keep pace with Moore’s Law, a self-fulfilling prophecy which says that critical dimensions halve every 18 months, special techniques h ...
... Figure 3. Comparison between a conventional mask and a phase-shifting mask. The historical trend of integrated circuit minimum feature-size is shown in Figure 2. To keep pace with Moore’s Law, a self-fulfilling prophecy which says that critical dimensions halve every 18 months, special techniques h ...
Optical Coherence Tomography
... optical interferometry [1] involving the employment of a beam of light with a limited coherence length. It provides a micro-scale spatial resolution in both lateral and axial direction, while maintaining a longer scanning depth by using objective lenses of low numerical aperture. The spectroscopic o ...
... optical interferometry [1] involving the employment of a beam of light with a limited coherence length. It provides a micro-scale spatial resolution in both lateral and axial direction, while maintaining a longer scanning depth by using objective lenses of low numerical aperture. The spectroscopic o ...
A Simple Classroom Demonstration of Natural Convection
... that are part of an overhead projector can be used to project a schlieren image of an object onto a screen. The schematic is a view from above, which means that the overhead projector is turned on its side. This is necessary so that vertically traveling fluid currents around the free-convection obje ...
... that are part of an overhead projector can be used to project a schlieren image of an object onto a screen. The schematic is a view from above, which means that the overhead projector is turned on its side. This is necessary so that vertically traveling fluid currents around the free-convection obje ...
Nature of light - Art of Problem Solving
... of an elliptical mirror. The four physically possible paths by which a ray can return to the center consist of two shortest-time paths and two longest-time paths !! ...
... of an elliptical mirror. The four physically possible paths by which a ray can return to the center consist of two shortest-time paths and two longest-time paths !! ...
Physical Properties of Lead Molybdate Relevant to Acousto
... 36X 10-12 cm sec2/g, and this occurs for a longitudinal acoustic wave propagating in the direction nsound = (0.35, 0.67, 0.65), and an extraordinarily polarized light wave propagating in the direction nlight= (0.43, 0.50, -0.75). This is about 27 times the M3 of fused silica. For comparison, with a ...
... 36X 10-12 cm sec2/g, and this occurs for a longitudinal acoustic wave propagating in the direction nsound = (0.35, 0.67, 0.65), and an extraordinarily polarized light wave propagating in the direction nlight= (0.43, 0.50, -0.75). This is about 27 times the M3 of fused silica. For comparison, with a ...
Light Field Microscopy - Stanford Computer Graphics Laboratory
... of the plane vertices) equal to zero (see [Levoy 1996]). This places the uv plane at infinity, which causes the input data to be treated as orthographic. The second and third properties means that microscopes lack parallax-based depth cues. As a result, microscopists are excited when they see our pe ...
... of the plane vertices) equal to zero (see [Levoy 1996]). This places the uv plane at infinity, which causes the input data to be treated as orthographic. The second and third properties means that microscopes lack parallax-based depth cues. As a result, microscopists are excited when they see our pe ...
A light scattering study of non equilibrium fluctuations
... square sapphire plates (40 × 40 × 8 mm3 ) kept at different temperatures by two square Peltier elements (Kryotherm, TB-109-1.4−1.5 CH) with a central circular aperture (φ = 13 mm). The two Peltier elements are driven by two temperature controllers (TCs) making use of a proportionalintegral-derivativ ...
... square sapphire plates (40 × 40 × 8 mm3 ) kept at different temperatures by two square Peltier elements (Kryotherm, TB-109-1.4−1.5 CH) with a central circular aperture (φ = 13 mm). The two Peltier elements are driven by two temperature controllers (TCs) making use of a proportionalintegral-derivativ ...
Atmospheric optics
Atmospheric optics deals with how the unique optical properties of the Earth's atmosphere cause a wide range of spectacular optical phenomena. The blue color of the sky is a direct result of Rayleigh scattering which redirects higher frequency (blue) sunlight back into the field of view of the observer. Because blue light is scattered more easily than red light, the sun takes on a reddish hue when it is observed through a thick atmosphere, as during a sunrise or sunset. Additional particulate matter in the sky can scatter different colors at different angles creating colorful glowing skies at dusk and dawn. Scattering off of ice crystals and other particles in the atmosphere are responsible for halos, afterglows, coronas, rays of sunlight, and sun dogs. The variation in these kinds of phenomena is due to different particle sizes and geometries.Mirages are optical phenomena in which light rays are bent due to thermal variations in the refraction index of air, producing displaced or heavily distorted images of distant objects. Other optical phenomena associated with this include the Novaya Zemlya effect where the sun appears to rise earlier or set later than predicted with a distorted shape. A spectacular form of refraction occurs with a temperature inversion called the Fata Morgana where objects on the horizon or even beyond the horizon, such as islands, cliffs, ships or icebergs, appear elongated and elevated, like ""fairy tale castles"".Rainbows are the result of a combination of internal reflection and dispersive refraction of light in raindrops. Because rainbows are seen on the opposite side of the sky as the sun, rainbows are more prominent the closer the sun is to the horizon due to their greater distance apart.