Cost-effective optical coherence tomography spectrometer based on
... coherence tomography (OCT) system. Featuring a 23 mm long active region at the fiber the spectrum is projected via a cylindrical lens for vertical beam collimation and focused by an achromatic doublet onto the detector array. Covering 740 nm to 860 nm the spectrometer was optically connected to a br ...
... coherence tomography (OCT) system. Featuring a 23 mm long active region at the fiber the spectrum is projected via a cylindrical lens for vertical beam collimation and focused by an achromatic doublet onto the detector array. Covering 740 nm to 860 nm the spectrometer was optically connected to a br ...
Get PDF - OSA Publishing
... edge; see Figs. 2(d) and 2(f). Therefore the configuration with out-of-phase shifted Bragg gratings is the most preferred for switching of slow-light pulses, since for = the dispersion of type (ii) is always realized for any values of the grating strength and the waveguide coupling, and simultan ...
... edge; see Figs. 2(d) and 2(f). Therefore the configuration with out-of-phase shifted Bragg gratings is the most preferred for switching of slow-light pulses, since for = the dispersion of type (ii) is always realized for any values of the grating strength and the waveguide coupling, and simultan ...
Absorption Enhancement in Ultrathin Crystalline Silicon Solar Cells
... to the Yablonovitch-limit spectrum given by eq 2. The short circuit current of 34.6 mA/cm2 in our optimized design is very close to 35.5 mA/cm2, the short-circuit current corresponding to the Yablonovitch limit at the equivalent thickness of 2 μm. The device physics for the absorption enhancement st ...
... to the Yablonovitch-limit spectrum given by eq 2. The short circuit current of 34.6 mA/cm2 in our optimized design is very close to 35.5 mA/cm2, the short-circuit current corresponding to the Yablonovitch limit at the equivalent thickness of 2 μm. The device physics for the absorption enhancement st ...
Photorefractive cyclometalated complexes
... He-Ne laser beams, each one with the power density I ~0.5 W cm–2. As usual, with organic materials, a DC external field was applied and in order to have a component of the applied field along the grating wavevector, the sample normal was tilted 60° away from the bisector of the beams. The grating pe ...
... He-Ne laser beams, each one with the power density I ~0.5 W cm–2. As usual, with organic materials, a DC external field was applied and in order to have a component of the applied field along the grating wavevector, the sample normal was tilted 60° away from the bisector of the beams. The grating pe ...
Advanced Microscopy
... resolution = two or one object? the point spread function (psf) = intensity pattern in the focal area of a lens this is equivalent to the image of a point source (light path is reversible) light is diffracted on the aperture of the microscope objective pattern is square magnitude of complex amplitud ...
... resolution = two or one object? the point spread function (psf) = intensity pattern in the focal area of a lens this is equivalent to the image of a point source (light path is reversible) light is diffracted on the aperture of the microscope objective pattern is square magnitude of complex amplitud ...
Photoelectric Effect
... respectively. If both metals are illuminated by white light (wavelengths between 400nm and 700nm), which one gives off photoelectrons with the greater maximum kinetic energy? Assuming electrons are ejected from both metals, the answer should be cadmium, because it has a lower work function – less en ...
... respectively. If both metals are illuminated by white light (wavelengths between 400nm and 700nm), which one gives off photoelectrons with the greater maximum kinetic energy? Assuming electrons are ejected from both metals, the answer should be cadmium, because it has a lower work function – less en ...
Introduction` Materials`
... required, and using standard equipment and materials safely, accurately, and effectively, to collect observations and data A1.12 use appropriate numeric, symbolic, and graphic modes of representation, and appropriate units of measurement (e.g., SI and imperial units) A1.13 express the results of any ...
... required, and using standard equipment and materials safely, accurately, and effectively, to collect observations and data A1.12 use appropriate numeric, symbolic, and graphic modes of representation, and appropriate units of measurement (e.g., SI and imperial units) A1.13 express the results of any ...
Variable Incidence Angle Fluorescence Interference Contrast
... developed a novel setup to improve the ease of doing VIATIRFM with glass, but because of the scarcity of indexmatching fluids above 1.6, it is not straightforward to extend this to higher refractive index materials that would allow significantly better reconstructed resolution. In contrast, FLIC, de ...
... developed a novel setup to improve the ease of doing VIATIRFM with glass, but because of the scarcity of indexmatching fluids above 1.6, it is not straightforward to extend this to higher refractive index materials that would allow significantly better reconstructed resolution. In contrast, FLIC, de ...
Document
... Pattern of Au on silicon obtained by evaporation through a polystyrene lattice. The chemical contrast arise from differences in the dielectric constant value at 633nm. BUT Topographic effects are not excluded: It is true chemical contrast? (This is a big issue in SNOM and the major source of SNOM ar ...
... Pattern of Au on silicon obtained by evaporation through a polystyrene lattice. The chemical contrast arise from differences in the dielectric constant value at 633nm. BUT Topographic effects are not excluded: It is true chemical contrast? (This is a big issue in SNOM and the major source of SNOM ar ...
7_SNOM
... Pattern of Au on silicon obtained by evaporation through a polystyrene lattice. The chemical contrast arise from differences in the dielectric constant value at 633nm. BUT Topographic effects are not excluded: It is true chemical contrast? (This is a big issue in SNOM and the major source of SNOM ar ...
... Pattern of Au on silicon obtained by evaporation through a polystyrene lattice. The chemical contrast arise from differences in the dielectric constant value at 633nm. BUT Topographic effects are not excluded: It is true chemical contrast? (This is a big issue in SNOM and the major source of SNOM ar ...
A Basic Introduction to BRDF-Based Lighting
... coordinates, and u and v represent the surface position parameterized in texture space. If you are unfamiliar with spherical coordinates, they are explained in the next section. Though a BRDF is truly a function of position, sometimes the positional variance is not included in a BRDF description. In ...
... coordinates, and u and v represent the surface position parameterized in texture space. If you are unfamiliar with spherical coordinates, they are explained in the next section. Though a BRDF is truly a function of position, sometimes the positional variance is not included in a BRDF description. In ...
A method for characterizing longitudinal chromatic aberration of
... part in the imaging the system is particularly sensitive to aberrations, whether specimen induced or inherent in the optical elements used (see, e.g. Pawley, 1995; Fricker & White, 1992). In applications such as single- or multiphoton-confocal fluorescence or second and third harmonic generation ima ...
... part in the imaging the system is particularly sensitive to aberrations, whether specimen induced or inherent in the optical elements used (see, e.g. Pawley, 1995; Fricker & White, 1992). In applications such as single- or multiphoton-confocal fluorescence or second and third harmonic generation ima ...
Optical Interconnect and Sensing
... It must be possible to make long, thin flexible fibers from the materials. The material must be transparent at a particular optical wavelength in order for the fiber to guide light efficiently. Physically compatible materials that have slightly different refractive indices for the core and cladding ...
... It must be possible to make long, thin flexible fibers from the materials. The material must be transparent at a particular optical wavelength in order for the fiber to guide light efficiently. Physically compatible materials that have slightly different refractive indices for the core and cladding ...
Basic Physical Optics
... In our study of ray optics and image formation, we represented image points as “geometrical points,” without physical extent. That, of course, followed logically since light rays were used to locate the image points and light rays are lines that intersect clearly at geometrical points. But in realit ...
... In our study of ray optics and image formation, we represented image points as “geometrical points,” without physical extent. That, of course, followed logically since light rays were used to locate the image points and light rays are lines that intersect clearly at geometrical points. But in realit ...
Wave Optics
... Thin-Film Interference For light, as for any electromagnetic wave, wavelength, frequency, and speed are related by ...
... Thin-Film Interference For light, as for any electromagnetic wave, wavelength, frequency, and speed are related by ...
Phase microscopy and tomography
... the developed algorithm provides images of high resolution. However the accuracy of phase reconstructions is questionable as the reconstructed phase is substantially distorted by a presence of unfiltered twin image and zero order. Technique uses an approximation, that object beam intensity and twin ...
... the developed algorithm provides images of high resolution. However the accuracy of phase reconstructions is questionable as the reconstructed phase is substantially distorted by a presence of unfiltered twin image and zero order. Technique uses an approximation, that object beam intensity and twin ...
Journal of Modern Optics Slow and fast light: fundamentals and
... coherent population oscillations (CPO). This process has been studied since the 1960s [33–35] and has successfully been exploited for slow- and fast-light research [8,9,11,36–42]. The idea behind CPO is illustrated in Figure 4. If a pump beam at frequency ! and a detuned probe beam at frequency !þ ...
... coherent population oscillations (CPO). This process has been studied since the 1960s [33–35] and has successfully been exploited for slow- and fast-light research [8,9,11,36–42]. The idea behind CPO is illustrated in Figure 4. If a pump beam at frequency ! and a detuned probe beam at frequency !þ ...
Optical power - WordPress.com
... dark current the leakage current that flows through photodiode when there is no light input ...
... dark current the leakage current that flows through photodiode when there is no light input ...
Joule Expansion Imaging Techniques on Microlectronic Devices
... As integration density of microelectronic circuits goes increasing, there is a need for methods able to measure local temperature variations or surface displacements at submicronic scales. As a consequence, well-known temperature measurement methods such as infrared imaging [1], liquid crystals meas ...
... As integration density of microelectronic circuits goes increasing, there is a need for methods able to measure local temperature variations or surface displacements at submicronic scales. As a consequence, well-known temperature measurement methods such as infrared imaging [1], liquid crystals meas ...
Physical Optics: Diffraction, Interference, and Polarization of Light
... When light passes through an opening or simply goes by the edge of any obstacle, the wave bends into the region not directly exposed to the wavefront. This phenomena is called diffraction. When the size of the opening or object is large compared to the wavelength of the light, the spreading effect i ...
... When light passes through an opening or simply goes by the edge of any obstacle, the wave bends into the region not directly exposed to the wavefront. This phenomena is called diffraction. When the size of the opening or object is large compared to the wavelength of the light, the spreading effect i ...
Surface plasmon resonance microscopy
Surface Plasmon Resonance Microscopy (SPRM) is a label free analytical tool that combines the surface plasmon resonance of metallic surfaces with imaging of the metallic surface.The heterogeneity of the refractive index of the metallic surface imparts high contrast images, caused by the shift in the resonance angle.SPRM can achieve a thickness sensitivity of few tenths of nanometer and lateral resolution achieves values of micrometer scale.SPRM is used to characterize surfaces, self-assembled monolayers, multilayer films, metal nanoparticles, oligonucleotides arrays, binding and reduction reactions.Surface Plasmon polaritons are surface electromagnetic waves coupled to oscillating free electrons of a metallic surface that propagate along a metal/dielectric interface.Since polaritons are highly sensitive to small changes in the refractive index of the metallic material,it can be used as a biosensing tool that does not require labeling. SPRM measurements can be made in real-time.Wang and collaborators studied the binding kinetics of membrane proteins in single cells.The experimental setup of an SPRM can be seen in the Figure 1, where an adherent cell is grown on a gold film and placed in an inverted microscope, p-polarized light was used to create the surface plasmons on the gold film and a CCD camera was used to create the SPR image.