Microscopy - Frank`s Hospital Workshop
... in order to build up an image. This process may be carried out by wide-field irradiation of the sample (for example standard light microscopy and transmission electron microscopy) or by scanning of a fine beam over the sample (for example confocal laser scanning microscopy and scanning electron micr ...
... in order to build up an image. This process may be carried out by wide-field irradiation of the sample (for example standard light microscopy and transmission electron microscopy) or by scanning of a fine beam over the sample (for example confocal laser scanning microscopy and scanning electron micr ...
downhole enthalpy measurement in geothermal wells with fiber optics
... Alternatively the local void fraction can also be determined by a time-averaging procedure as ...
... Alternatively the local void fraction can also be determined by a time-averaging procedure as ...
Time-resolved detection of propagating Lamb waves in thin
... inverse repetition rate (1.25 ns). The propagating Lamb modes are discussed in more detail below. In Figs. 3(a)–3(c), the Fourier spectra for the 100 nm grating corresponding to the time-domain data in Fig. 2 are shown. The spectrum where both pump and probe are spatially overlapping (a) shows a den ...
... inverse repetition rate (1.25 ns). The propagating Lamb modes are discussed in more detail below. In Figs. 3(a)–3(c), the Fourier spectra for the 100 nm grating corresponding to the time-domain data in Fig. 2 are shown. The spectrum where both pump and probe are spatially overlapping (a) shows a den ...
Total Internal Reflection Spectroscopy for Studying Soft Matter
... when the surface sensitivity is not necessary, for example in sum-frequency generation where the surface sensitivity is intrinsic to the technique but a TIR geometry is still convenient experimentally since the signal scales as the sixth power of the electric fields at the interface. Finally, TIR te ...
... when the surface sensitivity is not necessary, for example in sum-frequency generation where the surface sensitivity is intrinsic to the technique but a TIR geometry is still convenient experimentally since the signal scales as the sixth power of the electric fields at the interface. Finally, TIR te ...
Initial demonstration of a local, evanescent, array coupled biosensor concept
... We are developing a local, evanescent, array coupled (LEAC) biosensor, which provides high optical sensitivity to multiple small localized adlayers. NSOM was used for the first time to directly measure the change in the optical intensity due to the adlayers on the waveguide. In this initial demonstr ...
... We are developing a local, evanescent, array coupled (LEAC) biosensor, which provides high optical sensitivity to multiple small localized adlayers. NSOM was used for the first time to directly measure the change in the optical intensity due to the adlayers on the waveguide. In this initial demonstr ...
Excitation of a one-dimensional evanescent wave by conical edge
... Plasmonic metal structures are amongst the elementary constituents capable of confining electromagnetic radiation to deep sub-wavelength scale. In this context, geometrical singularities [1–5] and surface discontinuities [6, 7] are playing a major role at controlling the flow of surface plasmon pola ...
... Plasmonic metal structures are amongst the elementary constituents capable of confining electromagnetic radiation to deep sub-wavelength scale. In this context, geometrical singularities [1–5] and surface discontinuities [6, 7] are playing a major role at controlling the flow of surface plasmon pola ...
Formic acid oxidation reaction on a PdxNiy bimetallic nanoparticle
... unique ability to catalyze the oxidation of formic acid in fuel cells in 1987 [5]. Recently, many methods to synthesize Pd NPs have been reported. For example, Wang et al. [6] reported a facile method to synthesize Pd NPs supported on graphene ribbon (GR), in which Na2PdCl4 was employed as the precu ...
... unique ability to catalyze the oxidation of formic acid in fuel cells in 1987 [5]. Recently, many methods to synthesize Pd NPs have been reported. For example, Wang et al. [6] reported a facile method to synthesize Pd NPs supported on graphene ribbon (GR), in which Na2PdCl4 was employed as the precu ...
Characterization of a 90° waveguide bend using near-field scanning optical microscopy
... Waveguide bends are frequently used in photonic integrated circuits and optical sensors. Several theoretical models have been used to investigate modes in waveguide bends.1,2 Among them, the conformal index transformation method is regarded as a simple and effective method to solve for the mode prof ...
... Waveguide bends are frequently used in photonic integrated circuits and optical sensors. Several theoretical models have been used to investigate modes in waveguide bends.1,2 Among them, the conformal index transformation method is regarded as a simple and effective method to solve for the mode prof ...
Experimental study of transmission enhancement of evanescent waves through silver
... evidence of the essential foundation of superlensing, and indicates the path that will enable the observation of superlensing at optical wavelengths. Experimentally, the quantitative and direct measurement of transmission enhancement of evanescent waves has not been reported yet to our knowledge. Mo ...
... evidence of the essential foundation of superlensing, and indicates the path that will enable the observation of superlensing at optical wavelengths. Experimentally, the quantitative and direct measurement of transmission enhancement of evanescent waves has not been reported yet to our knowledge. Mo ...
Improved Theoretical Reflectivities of Extreme Ultraviolet Mirrors
... global optimization routines, based on optimal control theory, to vary the partition of each period within the stack for optimum peak reflectivity, and (3) by selecting certain relatively inert materials as capping layers to avoid the formation of highly absorbing surface oxide films. We show that o ...
... global optimization routines, based on optimal control theory, to vary the partition of each period within the stack for optimum peak reflectivity, and (3) by selecting certain relatively inert materials as capping layers to avoid the formation of highly absorbing surface oxide films. We show that o ...
Planar Integrated Optical Waveguide Spectroscopy
... demonstrate the unprecedented combination of spectral bandwidth and path length enhancement (>1000 relative to a transmission geometry) provided by this spectrometer. A much simpler design was the basis of a second-generation spectrometer with a 110-nm spectral bandwidth (35). In this case, a commer ...
... demonstrate the unprecedented combination of spectral bandwidth and path length enhancement (>1000 relative to a transmission geometry) provided by this spectrometer. A much simpler design was the basis of a second-generation spectrometer with a 110-nm spectral bandwidth (35). In this case, a commer ...
Liquid Fundamental Measurements on an Aggregated Dye Crystal
... from multiple molecules, they exhibit a nematic liquid crystal phase nonetheless. We use the term aggregated dye liquid crystal to refer to the class of dyes that form LCLCs. In addition to dyes, certain materials used as drugs, nucleic acids, antibiotics, and anti-cancer agents have been found to h ...
... from multiple molecules, they exhibit a nematic liquid crystal phase nonetheless. We use the term aggregated dye liquid crystal to refer to the class of dyes that form LCLCs. In addition to dyes, certain materials used as drugs, nucleic acids, antibiotics, and anti-cancer agents have been found to h ...
Template for Electronic Submission to ACS Journals
... branches of optics as precise frequency selective filters or as antireflective coatings. Although most routes of fabrication of such multilayer structures are based on physical deposition, some successful methods have been developed within the field of materials chemistry.2 Within this approach, two ...
... branches of optics as precise frequency selective filters or as antireflective coatings. Although most routes of fabrication of such multilayer structures are based on physical deposition, some successful methods have been developed within the field of materials chemistry.2 Within this approach, two ...
Nanofocusing of mid-infrared electromagnetic waves on graphene
... optics,28 and solar cells.29 Furthermore, SPP waves can propagate on graphene with supporting substrate30 and possess outstanding advantages, such as relatively low loss, high confinement, and most significantly, tunability of chemical potential.31 In this letter, we numerically analyze nanofocusing ...
... optics,28 and solar cells.29 Furthermore, SPP waves can propagate on graphene with supporting substrate30 and possess outstanding advantages, such as relatively low loss, high confinement, and most significantly, tunability of chemical potential.31 In this letter, we numerically analyze nanofocusing ...
Isopropanol oxidation by pure metal oxide
... The adsorption and reaction of alcohols on metal oxide catalysts has been used as a chemical probe reaction for many years. Alcohol reactions have been studied extensively using temperature programmed decomposition (TPD), steady-state kinetic studies, in situ spectroscopy, microcalorimetry and many ...
... The adsorption and reaction of alcohols on metal oxide catalysts has been used as a chemical probe reaction for many years. Alcohol reactions have been studied extensively using temperature programmed decomposition (TPD), steady-state kinetic studies, in situ spectroscopy, microcalorimetry and many ...
OSLER.PDF
... Measured data and model predictions [5] for the intensity versus time decay of the first seabed return are presented in Fig. 3 for a pulse vertically incident on the seabed. The surface scatter intensity, I sb1 , is calculated for three values of surface roughness, 3.75, 7.5, and 15 cm, and a fixed ...
... Measured data and model predictions [5] for the intensity versus time decay of the first seabed return are presented in Fig. 3 for a pulse vertically incident on the seabed. The surface scatter intensity, I sb1 , is calculated for three values of surface roughness, 3.75, 7.5, and 15 cm, and a fixed ...
Far-field optical microscope with nanometer-scale
... which propagate over a periodically corrugated gold surface must be leaky modes due to the photonic crystal effects. The dispersion laws of surface plasmons and normal photons propagating inside the dielectric at small angles along the metal-dielectric interface are shown in Fig.2, where k represent ...
... which propagate over a periodically corrugated gold surface must be leaky modes due to the photonic crystal effects. The dispersion laws of surface plasmons and normal photons propagating inside the dielectric at small angles along the metal-dielectric interface are shown in Fig.2, where k represent ...
Shape Reconstruction from Multiple Images of the Ocean Surface
... light gradient method, these systems cross the air-sea interface and may disturb the surface. To design a system capable of recovering instantaneous joint elevation-slope maps over a 512 by 512 grid, while not disturbing the air-surface interface, a variety of passive image analysis techniques were ...
... light gradient method, these systems cross the air-sea interface and may disturb the surface. To design a system capable of recovering instantaneous joint elevation-slope maps over a 512 by 512 grid, while not disturbing the air-surface interface, a variety of passive image analysis techniques were ...
Oxidation of some Late Transition Metal Surfaces: Structural studies
... The final line shape is given by a convolution of the three different broadening contributions and if several components – corresponding e.g. to different chemical surroundings or resolved vibrations – are present the total line shape is achieved by the sum of them. The actual analysis is performed ...
... The final line shape is given by a convolution of the three different broadening contributions and if several components – corresponding e.g. to different chemical surroundings or resolved vibrations – are present the total line shape is achieved by the sum of them. The actual analysis is performed ...
Lecture 18
... microscope can be characterized by the modulation transfer function (MTF) • MTF is measurement of microscope's ability to transfer contrast from the specimen to the image plane at specific resolution. • Incorporates resolution and contrast into one specification ...
... microscope can be characterized by the modulation transfer function (MTF) • MTF is measurement of microscope's ability to transfer contrast from the specimen to the image plane at specific resolution. • Incorporates resolution and contrast into one specification ...
Advanced Microscopy
... arm, which allows a higher resolution in the depth of the sample. Objects which are not in the image plane are virtually cut out by ...
... arm, which allows a higher resolution in the depth of the sample. Objects which are not in the image plane are virtually cut out by ...
Subnanometer-accuracy optical distance ruler based on fluorescence quenching by transparent conductors R
... measuring absolute distances, as the efficiency critically depends on the yield of the double binding of two molecules and unknown or hard-to-determine coupling factors [16]. Likewise, rulers based on detecting spectral changes in the plasmon resonances of metal nanoparticles have been successfully ...
... measuring absolute distances, as the efficiency critically depends on the yield of the double binding of two molecules and unknown or hard-to-determine coupling factors [16]. Likewise, rulers based on detecting spectral changes in the plasmon resonances of metal nanoparticles have been successfully ...
Chapter 9: Non-aqueous media
... force between two point charges (or two ions) is considerably reduced compared with that in a vacuum. Thus we can consider a dilute aqueous solution of a salt to contain well-separated, non-interacting ions. Table 9.1 lists dielectric constants for water and a range of common organic solvents. The a ...
... force between two point charges (or two ions) is considerably reduced compared with that in a vacuum. Thus we can consider a dilute aqueous solution of a salt to contain well-separated, non-interacting ions. Table 9.1 lists dielectric constants for water and a range of common organic solvents. The a ...
A light scattering study of non equilibrium fluctuations
... signal Is (q). Such a static low angle scattering analysis has already been described in detail elsewhere15, 16, 39 and we will only discuss it here briefly. First, we point out that measured static signal is actually convoluted by the imaging transfer function T(q), which depends on the optical set ...
... signal Is (q). Such a static low angle scattering analysis has already been described in detail elsewhere15, 16, 39 and we will only discuss it here briefly. First, we point out that measured static signal is actually convoluted by the imaging transfer function T(q), which depends on the optical set ...
Total internal reflection fluorescence spectroscopy and microscopy
... techniques use an evanescent electromagnetic field for the excitation of fluorophores. This field arises upon total reflection of the excitation light on the cell-substrate interface, penetrates into the cell and decays exponentially with perpendicular distance z from the interface, as depicted in F ...
... techniques use an evanescent electromagnetic field for the excitation of fluorophores. This field arises upon total reflection of the excitation light on the cell-substrate interface, penetrates into the cell and decays exponentially with perpendicular distance z from the interface, as depicted in F ...