RADIOMETRY - gamma
... Silicon, InGaAs and germanium are especially well suited to measure light. these materials are specially processed to convert incident radiation to an electrical signal by the photoelectric effect.The converson ratio or detector responsivity is linear over the sensor's input range.For a silicon sen ...
... Silicon, InGaAs and germanium are especially well suited to measure light. these materials are specially processed to convert incident radiation to an electrical signal by the photoelectric effect.The converson ratio or detector responsivity is linear over the sensor's input range.For a silicon sen ...
EFFECT OF TEMPERATURE ON THE REFRACTIVE INDICES AND
... The liquid crystal was encapsulated in a cell with plane-parallel glass plates, prepared to provide a planar and uniaxial alignment of the molecules. The cell with liquid crystal was thermostated using a special electric oven and temperature was measured with a digital thermometer with accuracy of 0 ...
... The liquid crystal was encapsulated in a cell with plane-parallel glass plates, prepared to provide a planar and uniaxial alignment of the molecules. The cell with liquid crystal was thermostated using a special electric oven and temperature was measured with a digital thermometer with accuracy of 0 ...
Nano-optomechanical Actuator and Pull-Back Instability
... low cost. However, the microscale dimensions limit both the speed and precision of actuation. Nanoelectromechanical systems (NEMS) scale down the dimensions.7,8 In particular, NEMS employing electrostatic forces have been developed.9,10 For parallel-plate electrostatic actuators, the pull-in instabi ...
... low cost. However, the microscale dimensions limit both the speed and precision of actuation. Nanoelectromechanical systems (NEMS) scale down the dimensions.7,8 In particular, NEMS employing electrostatic forces have been developed.9,10 For parallel-plate electrostatic actuators, the pull-in instabi ...
Experimental observation of the far field diffraction patterns of
... [1-7]. In particular, concentric ring intensity distribution pattern can be induced in the far field of a beam after propagation through a nonlinear material. This effect of spatial phase-modulation (SPM) is due to the intensitydependent complex refractive index and it has been observed in several s ...
... [1-7]. In particular, concentric ring intensity distribution pattern can be induced in the far field of a beam after propagation through a nonlinear material. This effect of spatial phase-modulation (SPM) is due to the intensitydependent complex refractive index and it has been observed in several s ...
A Michelson Interferometer-Based Method For Measuring The Angle
... The angle of rotation of a surface about its axis can be measured in a number of ways based on optical interferometry, internal-reflection of optical elements and fringe projectiont'° Each method has its advantages and limitations. For example, the method ofpoint-of-light triangulation is easy to pe ...
... The angle of rotation of a surface about its axis can be measured in a number of ways based on optical interferometry, internal-reflection of optical elements and fringe projectiont'° Each method has its advantages and limitations. For example, the method ofpoint-of-light triangulation is easy to pe ...
PDF
... stabilizing the optical performance with respect to temperature. Any temperature changes experienced by the optics may be with respect to time or space or both. Time refers to a uniform heat soak across all the optics, and space refers to a gradient across the optics resulting in each lens (and hous ...
... stabilizing the optical performance with respect to temperature. Any temperature changes experienced by the optics may be with respect to time or space or both. Time refers to a uniform heat soak across all the optics, and space refers to a gradient across the optics resulting in each lens (and hous ...
Porous Biomimetic Microlens Arrays as Multifunctional Optical
... electrode embedded in a dielectric substrate at a certain distance from the liquid - solid interface.2,3 A different type of tunable fluidic lens is obtained from a thin polydimethylsiloxane (PDMS) membrane sitting on a fluidic chamber bonded to a thin glass slide.4 Elastic deformation of the membra ...
... electrode embedded in a dielectric substrate at a certain distance from the liquid - solid interface.2,3 A different type of tunable fluidic lens is obtained from a thin polydimethylsiloxane (PDMS) membrane sitting on a fluidic chamber bonded to a thin glass slide.4 Elastic deformation of the membra ...
An optical cloak made of dielectrics LETTERS *
... dielectric carpet cloak design that is not only isotropic, but also lowloss and broadband. The invisibility is demonstrated within a silicon (Si) slab waveguide where the cloak region is obtained by varying the effective index of refraction in a two-dimensional (2D) space. This index profile is desi ...
... dielectric carpet cloak design that is not only isotropic, but also lowloss and broadband. The invisibility is demonstrated within a silicon (Si) slab waveguide where the cloak region is obtained by varying the effective index of refraction in a two-dimensional (2D) space. This index profile is desi ...
Total Internal Reflection Spectroscopy for Studying Soft Matter
... of the electric field at the interface due to the overlap of the incident and reflected waves, leading to an increase in sensitivity. This effect is useful even when the surface sensitivity is not necessary, for example in sum-frequency generation where the surface sensitivity is intrinsic to the te ...
... of the electric field at the interface due to the overlap of the incident and reflected waves, leading to an increase in sensitivity. This effect is useful even when the surface sensitivity is not necessary, for example in sum-frequency generation where the surface sensitivity is intrinsic to the te ...
Slide 1
... Abstract: Acousto-optic (AO) imaging is a new dual-wave modality that combines ultrasound with diffuse light to achieve deep-tissue imaging of optical properties with the spatial resolution of ultrasound. In this technique, the sample is simultaneously insonified by an ultrasound beam and illuminate ...
... Abstract: Acousto-optic (AO) imaging is a new dual-wave modality that combines ultrasound with diffuse light to achieve deep-tissue imaging of optical properties with the spatial resolution of ultrasound. In this technique, the sample is simultaneously insonified by an ultrasound beam and illuminate ...
Bandgap-assisted surface-plasmon sensing Arnaud J. Benahmed* and Chih-Ming Ho
... scale, we instead use in this paper the gap appearing at the 0⫹ and 1⫺ branch intersections, which is controlled by the the first order of the grating. However, in order to probe this gap by the SPR technique, a prism needs to be used to increase the excitation light transverse momentum. As illustra ...
... scale, we instead use in this paper the gap appearing at the 0⫹ and 1⫺ branch intersections, which is controlled by the the first order of the grating. However, in order to probe this gap by the SPR technique, a prism needs to be used to increase the excitation light transverse momentum. As illustra ...
Interface Reaction between a Metal Mirror Layer and a Dielectric
... type (CD-R or DVD-R) consists of an organic dye layer and a metal mirror layer. When a CD-R is irradiated by a recording laser, the recording pits are formed by decomposition or degeneration of the dye succeeded by deformation of the metal reflective layer, resulting in reflectance decrease. The org ...
... type (CD-R or DVD-R) consists of an organic dye layer and a metal mirror layer. When a CD-R is irradiated by a recording laser, the recording pits are formed by decomposition or degeneration of the dye succeeded by deformation of the metal reflective layer, resulting in reflectance decrease. The org ...
Factors Toward The Development Of A Robust Surface Plasmon
... the surface plasmon polariton (SPP) is formed, these particles starts propagating along the metal-dielectric interface with amplitudes decaying into both layers. SPP is used to overcome diffraction limit. This leads to the fabrication of photonic devices at very smaller scales than those currently a ...
... the surface plasmon polariton (SPP) is formed, these particles starts propagating along the metal-dielectric interface with amplitudes decaying into both layers. SPP is used to overcome diffraction limit. This leads to the fabrication of photonic devices at very smaller scales than those currently a ...
Improved Theoretical Reflectivities of Extreme Ultraviolet Mirrors
... reflectivity of a single mirror will yield a significant light throughput enhancement in the overall optical system. A particular problem in the EUV region is that all useful materials absorb the radiation to a certain extent. To reduce the effect on the reflectivity response of the absorption losse ...
... reflectivity of a single mirror will yield a significant light throughput enhancement in the overall optical system. A particular problem in the EUV region is that all useful materials absorb the radiation to a certain extent. To reduce the effect on the reflectivity response of the absorption losse ...
Ellipsometry of light scattering from multilayer coatings
... scopic measurements can help us to recover the values of both the thickness and the dispersion law of refractive index of each layer.16 Many configurations14,15 can be used to perform these measurements, depending on the residual polarization rate of the source, the polarization sensitivity of the d ...
... scopic measurements can help us to recover the values of both the thickness and the dispersion law of refractive index of each layer.16 Many configurations14,15 can be used to perform these measurements, depending on the residual polarization rate of the source, the polarization sensitivity of the d ...
Orientation of perylene derivatives on semiconductor surfaces
... respect to the substrate surface. For DiMe-PTCDI the p-resonances depend quite differently on the angle of incidence. Fig. 1b shows the O-K shell spectra as a function of the angle of incidence and the intensity of the p-resonances normalized to the intensity of the s-resonances. Here, a maximum ...
... respect to the substrate surface. For DiMe-PTCDI the p-resonances depend quite differently on the angle of incidence. Fig. 1b shows the O-K shell spectra as a function of the angle of incidence and the intensity of the p-resonances normalized to the intensity of the s-resonances. Here, a maximum ...
Fabrication of a Fabry–Pérot Cavity in a Microfluidic Channel Using Thermocompressive
... channels due to their advantages over other materials, such as robustness, high resistance to chemicals, a wide optical transmission range, and high electrical insulation. The glass substrates were first cleaned with acetone, methanol, and deionized (DI) water prior to the deposition of etch masking ...
... channels due to their advantages over other materials, such as robustness, high resistance to chemicals, a wide optical transmission range, and high electrical insulation. The glass substrates were first cleaned with acetone, methanol, and deionized (DI) water prior to the deposition of etch masking ...
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.