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Flat optics with designer metasurfaces
... Three features distinguish metasurfaces from conventional optical components. First, wavefront shaping is accomplished within a distance much less than the wavelength from the interface after the incident light beam traverses or is reflected by the optically thin metasurface. Large and controllable ...
... Three features distinguish metasurfaces from conventional optical components. First, wavefront shaping is accomplished within a distance much less than the wavelength from the interface after the incident light beam traverses or is reflected by the optically thin metasurface. Large and controllable ...
Polarization-controlled contrasted images using dye
... Z-scan technique using a cw He-Ne laser at 633 nm. The results demonstrated that the magnitude of the photoinduced phase delay can be controlled not only by the beam’s power but also by the light’s polarization. In addition, the sign of the nonlinearity can be switched from negative to positive as t ...
... Z-scan technique using a cw He-Ne laser at 633 nm. The results demonstrated that the magnitude of the photoinduced phase delay can be controlled not only by the beam’s power but also by the light’s polarization. In addition, the sign of the nonlinearity can be switched from negative to positive as t ...
Review and Comparison of High
... no need to make too many changes based on the original technique. Adjusting the exposure time would appear to be the best option. However, the exposure time cannot be arbitrarily chosen for a structured light system, where a digital-light-processing (DLP) projector is used to project the fringe patt ...
... no need to make too many changes based on the original technique. Adjusting the exposure time would appear to be the best option. However, the exposure time cannot be arbitrarily chosen for a structured light system, where a digital-light-processing (DLP) projector is used to project the fringe patt ...
- Wiley Online Library
... microorganisms in the rhizosphere has been obtained by light, transmission and scanning electron microscopy (Foster and Rovira, 1976; Campbell and Porter, 1982). Nevertheless, it is often difficult to obtain high-quality images due to the complex environment, the small size of the bacteria, and the ...
... microorganisms in the rhizosphere has been obtained by light, transmission and scanning electron microscopy (Foster and Rovira, 1976; Campbell and Porter, 1982). Nevertheless, it is often difficult to obtain high-quality images due to the complex environment, the small size of the bacteria, and the ...
Simultaneous trapping of low-index and high
... light trap and a dark trap in the same vicinity may be of interest for the trapping of cold atoms.19 For application purposes, it is of interest to know the absolute limits of particle size and refractive index that this technique affords. While there is no theoretical limit on the upper size limit ...
... light trap and a dark trap in the same vicinity may be of interest for the trapping of cold atoms.19 For application purposes, it is of interest to know the absolute limits of particle size and refractive index that this technique affords. While there is no theoretical limit on the upper size limit ...
lab 7 Wave Optics
... pattern, and you would like to try an interference technique with viruses. Two issues occur to you. The first issue is, of course, how to determine the size of an object from its diffraction pattern. The second issue has to do with the form in which the viruses will be studied. Your group can isolat ...
... pattern, and you would like to try an interference technique with viruses. Two issues occur to you. The first issue is, of course, how to determine the size of an object from its diffraction pattern. The second issue has to do with the form in which the viruses will be studied. Your group can isolat ...
The mechanism for continuum polarization in laser induced
... harmonic of a Nd:YAG laser (Continuum Surelite, 532 nm, 4 ns pulse width) to ablate the sample. A variable neutral density filter was placed before the focusing optics to set the pulse energy of the beam between 9 μJ and 4 mJ. The laser was focused onto the sample by a 100 mm focal length convex lens ...
... harmonic of a Nd:YAG laser (Continuum Surelite, 532 nm, 4 ns pulse width) to ablate the sample. A variable neutral density filter was placed before the focusing optics to set the pulse energy of the beam between 9 μJ and 4 mJ. The laser was focused onto the sample by a 100 mm focal length convex lens ...
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 ...
Fluorescent peptides as molecular probes
... AnaSpec include substrates for HCV, HIV, WNV; MMPs; α and β-secretases; cathepsin D and S; and aggrecanase-1 (ADAMTS-4). AnaSpec’s SensoLyte® 520 MMP assay kits also employ the 5-FAM/QXL™ 520 FRET pair. These kits are also robust and highly sensitive. They are ideal for screening of MMP inhibitors a ...
... AnaSpec include substrates for HCV, HIV, WNV; MMPs; α and β-secretases; cathepsin D and S; and aggrecanase-1 (ADAMTS-4). AnaSpec’s SensoLyte® 520 MMP assay kits also employ the 5-FAM/QXL™ 520 FRET pair. These kits are also robust and highly sensitive. They are ideal for screening of MMP inhibitors a ...
K.C. Neuman and S.M. Block, "Optical Trapping"
... of a laser), the second component of the optical force, the gradient force, must be considered. The gradient force, as the name suggests, arises from the fact that a dipole in an inhomogeneous electric field experiences a force in the direction of the field gradient.67 In an optical trap, the laser ...
... of a laser), the second component of the optical force, the gradient force, must be considered. The gradient force, as the name suggests, arises from the fact that a dipole in an inhomogeneous electric field experiences a force in the direction of the field gradient.67 In an optical trap, the laser ...
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... coherence, which can reveal information about the sample of interest. Light scattering by cells and tissues evolved as a dynamic area of study, especially because this type of investigation can potentially offer a noninvasive window into function and pathology [1–9]. Despite all these efforts, light ...
... coherence, which can reveal information about the sample of interest. Light scattering by cells and tissues evolved as a dynamic area of study, especially because this type of investigation can potentially offer a noninvasive window into function and pathology [1–9]. Despite all these efforts, light ...
Extending the Effective Ranging Depth of Spectral Domain Optical
... depth is defined as the imaging depth at which the sensitivity has decayed −6 dB from the peak value [2]. For FDOCT, the complex conjugate ambiguity further limits the imaging depth to one half of the full-range imaging space. Another limitation on the imaging depth of the FDOCT is posed by the fini ...
... depth is defined as the imaging depth at which the sensitivity has decayed −6 dB from the peak value [2]. For FDOCT, the complex conjugate ambiguity further limits the imaging depth to one half of the full-range imaging space. Another limitation on the imaging depth of the FDOCT is posed by the fini ...
Holographic methods for phase microscopic objects study
... where λ is the wavelength of the light being used, t is the thickness of the microobject.. So, the phase difference of the waves depends also on the thickness of the specimen. These waves can not interfere because they have orthogonal polarizations. Though, behind the linear analyzer, which transmit ...
... where λ is the wavelength of the light being used, t is the thickness of the microobject.. So, the phase difference of the waves depends also on the thickness of the specimen. These waves can not interfere because they have orthogonal polarizations. Though, behind the linear analyzer, which transmit ...
Directional Reflection measurements on
... reference mode, which is the V mode for the VW accessory, and the I mode for the IV accessory In the IV accessory, the beam coming from the polariser (in Fig. 6 shown in the P position, as indicated by the “P” on top), passes 3 mirrors before it is transmitted by a broadband polkadot beamsplitter (B ...
... reference mode, which is the V mode for the VW accessory, and the I mode for the IV accessory In the IV accessory, the beam coming from the polariser (in Fig. 6 shown in the P position, as indicated by the “P” on top), passes 3 mirrors before it is transmitted by a broadband polkadot beamsplitter (B ...
Diamond chemical-vapor deposition on optical fibers for
... centers into the near-field for coupling to the fiber and opens the possibility of devices where the centers are used as coupling elements 共for example on a near field scanning optical microsopy probe for surface analysis兲, or where the fluorescence is the desired product, for example as a single-ph ...
... centers into the near-field for coupling to the fiber and opens the possibility of devices where the centers are used as coupling elements 共for example on a near field scanning optical microsopy probe for surface analysis兲, or where the fluorescence is the desired product, for example as a single-ph ...
IDENTIFICATION OF BACTERIA ASSOCIATED WITH
... ton, are thus of prime importance for a better understanding of the occurrence of toxic blooms and more generally to assess bacteria–phytoplankton association in marine pelagic ecosystems. So far the physical association between bacteria and phytoplankton has been studied by different technical appr ...
... ton, are thus of prime importance for a better understanding of the occurrence of toxic blooms and more generally to assess bacteria–phytoplankton association in marine pelagic ecosystems. So far the physical association between bacteria and phytoplankton has been studied by different technical appr ...
full text pdf
... the spatial distribution of the light intensity that is propor− tional to the component of the full mean Poynting vector, that is normal to the detection scanning plane placed in the particle proximity. While for such large particles (compared to the light wavelength), the quasistatic approximation ...
... the spatial distribution of the light intensity that is propor− tional to the component of the full mean Poynting vector, that is normal to the detection scanning plane placed in the particle proximity. While for such large particles (compared to the light wavelength), the quasistatic approximation ...
Integral holography: white-light single-shot hologram
... three different holograms, each with a different phase factor of the DOE, are recorded sequentially and superposed in the computer into a digital Fresnel hologram. A fundamentally different solution is suggested in Refs. [3,4]. According to the methods presented there, the 3-D scene is illuminated b ...
... three different holograms, each with a different phase factor of the DOE, are recorded sequentially and superposed in the computer into a digital Fresnel hologram. A fundamentally different solution is suggested in Refs. [3,4]. According to the methods presented there, the 3-D scene is illuminated b ...
Kerala University Optoelectronics Optical Communication
... Diffraction – Kirchoff integral theorem, Fresnel-Kirchoff formula, Babinet’s principle, Fraunhofer and Fresnel diffraction, Fraunhofer diffraction patterns, single slit, rectangular aperture, circular aperture, double slit, multiple slits, Fresnel diffraction patterns, zone plate, Cornu’s spirals. F ...
... Diffraction – Kirchoff integral theorem, Fresnel-Kirchoff formula, Babinet’s principle, Fraunhofer and Fresnel diffraction, Fraunhofer diffraction patterns, single slit, rectangular aperture, circular aperture, double slit, multiple slits, Fresnel diffraction patterns, zone plate, Cornu’s spirals. F ...
Light amplificated by stimulated emission of radiation
... Types of Laser Gain Media There are a variety of very different gain media; the most common of them are: Certain direct-bandgap semiconductors such as GaAs, AlGaAs(aluminium Galium arsenide), or InGaAs(aluminium Galium arsenide), are typically pumped with electrical currents, these lasers are often ...
... Types of Laser Gain Media There are a variety of very different gain media; the most common of them are: Certain direct-bandgap semiconductors such as GaAs, AlGaAs(aluminium Galium arsenide), or InGaAs(aluminium Galium arsenide), are typically pumped with electrical currents, these lasers are often ...
Sodium vapor cell laser guide star experiments for continuous wave
... Artificial sodium laser guide stars (LGS) are used as a reference for atmospheric-turbulence compensation adaptive optics systems. Since the first reported demonstration of this technique in 1987,1 there have been significant efforts to maximize the brightness of a sodium LGS in order to increase th ...
... Artificial sodium laser guide stars (LGS) are used as a reference for atmospheric-turbulence compensation adaptive optics systems. Since the first reported demonstration of this technique in 1987,1 there have been significant efforts to maximize the brightness of a sodium LGS in order to increase th ...
Nonlinear optics in daily life
... includes multi-photon absorption, saturable absorption, multi-photon filament formation, optical limiting and Q-switching, among other applications. Nonlinear optical scattering processes are predominantly stimulated Raman and Brillouin scattering. From this vast array of NLO effects, which seemed t ...
... includes multi-photon absorption, saturable absorption, multi-photon filament formation, optical limiting and Q-switching, among other applications. Nonlinear optical scattering processes are predominantly stimulated Raman and Brillouin scattering. From this vast array of NLO effects, which seemed t ...
In Vivo Allium cepa
... The industrial production and commercial applications of titanium dioxide nanoparticles have increased considerably in recent times, which has increased the probability of environmental contamination with these agents and their adverse effects on living systems. This study was designed to assess the ...
... The industrial production and commercial applications of titanium dioxide nanoparticles have increased considerably in recent times, which has increased the probability of environmental contamination with these agents and their adverse effects on living systems. This study was designed to assess the ...
ptical Short Course International
... The throw distance is just the distance from the projection lens outer surface to the screen. This is an important parameter if your projector will be used in different locations where this distance changes. Before you start thinking about projecting a huge image remember you are spreading a fixed a ...
... The throw distance is just the distance from the projection lens outer surface to the screen. This is an important parameter if your projector will be used in different locations where this distance changes. Before you start thinking about projecting a huge image remember you are spreading a fixed a ...
mm {0.84 M PASS
... sensitive detector at the wavelength of 0.84 microme 2. The optical ?lter de?ned in claim 1, wherein said ters than it is at a wavelength of 1.06 micrometers. Therefore, although dichroic ?lter 208, because of its 35 plate comprises an anti-reflective coating on at least one of said opposed faces th ...
... sensitive detector at the wavelength of 0.84 microme 2. The optical ?lter de?ned in claim 1, wherein said ters than it is at a wavelength of 1.06 micrometers. Therefore, although dichroic ?lter 208, because of its 35 plate comprises an anti-reflective coating on at least one of said opposed faces th ...
Confocal microscopy
Confocal microscopy is an optical imaging technique for increasing optical resolution and contrast of a micrograph by means of adding a spatial pinhole placed at the confocal plane of the lens to eliminate out-of-focus light. It enables the reconstruction of three-dimensional structures from the obtained images. This technique has gained popularity in the scientific and industrial communities and typical applications are in life sciences, semiconductor inspection and materials science.