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Resolution-and throughput-enhanced spectroscopy using high
... the digital beams numerically through a high-throughput computational slit that is narrower than the physical entrance aperture of the spectrometer, improved spectral resolution can be achieved while reaping the light throughput benefits of a much larger entrance aperture. Figure 1a, shows the imag ...
... the digital beams numerically through a high-throughput computational slit that is narrower than the physical entrance aperture of the spectrometer, improved spectral resolution can be achieved while reaping the light throughput benefits of a much larger entrance aperture. Figure 1a, shows the imag ...
Determination of Electric-Field, Magnetic-Field, and Electric
... The peak shift seen in the current distribution in Figs. 4(b)–4(d) is the result of interdipole antenna coupling associated with Coulomb interaction across the gap and mutual impedance between the antennas. The coupling between antennas in this collinear arrangement is generally weak, in contrast to ...
... The peak shift seen in the current distribution in Figs. 4(b)–4(d) is the result of interdipole antenna coupling associated with Coulomb interaction across the gap and mutual impedance between the antennas. The coupling between antennas in this collinear arrangement is generally weak, in contrast to ...
Enhancement of coherent X-ray diffraction from nanocrystals by
... For these reasons we are interested in introducing focussing optics to improve the flux on the sample. Louiville's theorem dictates that an increase of flux requires additional divergence of the beam. Fortunately we can sacrifice some excess lateral coherence, which is inversely proportional to dive ...
... For these reasons we are interested in introducing focussing optics to improve the flux on the sample. Louiville's theorem dictates that an increase of flux requires additional divergence of the beam. Fortunately we can sacrifice some excess lateral coherence, which is inversely proportional to dive ...
Raman tailored photonic-crystal-fiber for telecom band photon
... To operate nearby the telecom wavelength 1.55 µm, the empty PCF transmission must therefore be centered well beyond 1.55 µm. We have chosen two commercial fibers (NKT Photonics) with transmission bands centered around 2.3 µm (called Fiber A) and 2 µm (called Fiber B). From Eq. (1), the refractive in ...
... To operate nearby the telecom wavelength 1.55 µm, the empty PCF transmission must therefore be centered well beyond 1.55 µm. We have chosen two commercial fibers (NKT Photonics) with transmission bands centered around 2.3 µm (called Fiber A) and 2 µm (called Fiber B). From Eq. (1), the refractive in ...
Slide 1
... Optimization and Quantitative Characterization of the System Puxiang Lai, Ronald A. Roy and Todd W. Murray Department of Aerospace and Mechanical Engineering, Boston University Abstract: Acousto-optic (AO) imaging is a new dual-wave modality that combines ultrasound with diffuse light to achieve dee ...
... Optimization and Quantitative Characterization of the System Puxiang Lai, Ronald A. Roy and Todd W. Murray Department of Aerospace and Mechanical Engineering, Boston University Abstract: Acousto-optic (AO) imaging is a new dual-wave modality that combines ultrasound with diffuse light to achieve dee ...
Coherent learning control of vibrational motion in room temperature molecular gases
... motion of individual bonds, rather than just populations of eigenstates. Secondly, since the laser pulse is shorter than sc , all of the laser energy deposited into the molecules is done so coherently, allowing for ecient molecular excitation (e.g., driving of overtones). Finally, one can programma ...
... motion of individual bonds, rather than just populations of eigenstates. Secondly, since the laser pulse is shorter than sc , all of the laser energy deposited into the molecules is done so coherently, allowing for ecient molecular excitation (e.g., driving of overtones). Finally, one can programma ...
X-ray phase contrast microscopy at 300 nm
... On the other hand, the propagation-based techniques [5–7] are usually less sensitive to slight phase gradients but they can be performed with simpler experimental setup, and they can be scaled down from synchrotron sources to laboratory sources. The main effects contributing to the achievable contra ...
... On the other hand, the propagation-based techniques [5–7] are usually less sensitive to slight phase gradients but they can be performed with simpler experimental setup, and they can be scaled down from synchrotron sources to laboratory sources. The main effects contributing to the achievable contra ...
Mechanical mapping with chemical specificity by confocal Brillouin
... stabilized against lateral drifts, which may occur during long time acquisitions. This is realized selecting a reference area within the illuminated region (through the red-yellow boxes in the figures) and using an image recognition software which supplies a feedback signal to the positioning stage. ...
... stabilized against lateral drifts, which may occur during long time acquisitions. This is realized selecting a reference area within the illuminated region (through the red-yellow boxes in the figures) and using an image recognition software which supplies a feedback signal to the positioning stage. ...
Structural and electronic properties of highly doped topological
... inside the growth zone was symmetric and estimated to be less than 0.5o C/cm. The typical speed for moving the ampoule through the temperature gradient was between 0.5 to 1.5 mm/hour. Measurements setup As-grown Bi2Se3 crystals were cleaved into smaller pieces for various measurements. X-ray diffrac ...
... inside the growth zone was symmetric and estimated to be less than 0.5o C/cm. The typical speed for moving the ampoule through the temperature gradient was between 0.5 to 1.5 mm/hour. Measurements setup As-grown Bi2Se3 crystals were cleaved into smaller pieces for various measurements. X-ray diffrac ...
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... rameter can be calculated when the refractive indices at the interface are known, experimental access to it for arbitrary samples has been limited, so far, to angularly resolved diffuse transmission.14 OPS provides a high-resolution P ssd distribution, and it can be used for accurate measurements of ...
... rameter can be calculated when the refractive indices at the interface are known, experimental access to it for arbitrary samples has been limited, so far, to angularly resolved diffuse transmission.14 OPS provides a high-resolution P ssd distribution, and it can be used for accurate measurements of ...
Scanning Tunneling Microscopy
... In the 20th century, once quantum mechanics demonstrated the wave-particle duality, some researchers saw that a way around the Abbe limit was to “shine” electrons on a sample rather than optical photons – since the electron’s wavelength is more than three orders of magnitude smaller than visible lig ...
... In the 20th century, once quantum mechanics demonstrated the wave-particle duality, some researchers saw that a way around the Abbe limit was to “shine” electrons on a sample rather than optical photons – since the electron’s wavelength is more than three orders of magnitude smaller than visible lig ...
1 Introduction 2 Theory of Optical Trapping
... used to set up the optical trap. A modulation voltage is used to control the laser intensity. A pair of mirrors is used to align the beam. A lens (f=+35mm), which can be manipulated in x, y, and z, is used to control the position of the trap in the sample. Simultaneously it expands the beam so that ...
... used to set up the optical trap. A modulation voltage is used to control the laser intensity. A pair of mirrors is used to align the beam. A lens (f=+35mm), which can be manipulated in x, y, and z, is used to control the position of the trap in the sample. Simultaneously it expands the beam so that ...
Airway Luminal Diameter and Shape Measurement by Means of an
... Figure Legend: Tracheal measurement model identical to that illustrated in Figure 3 except using greater distance (y2). A, White light passed from a tungsten-halogen source is collimated and directed at a diffraction grating to form a spectrum on the luminal surface of the divided trachea. The optic ...
... Figure Legend: Tracheal measurement model identical to that illustrated in Figure 3 except using greater distance (y2). A, White light passed from a tungsten-halogen source is collimated and directed at a diffraction grating to form a spectrum on the luminal surface of the divided trachea. The optic ...
Localized surface plasmon resonances
... • Excitation above resonance, >sp • 25 nm-wide channel in Ag filled with GaP • Simulation shows negative phase velocity with respect to power flow • Negative refractive index of -2 ...
... • Excitation above resonance, >sp • 25 nm-wide channel in Ag filled with GaP • Simulation shows negative phase velocity with respect to power flow • Negative refractive index of -2 ...
Two-photon ablation with 1278nm laser radiation
... The use of femtosecond pulses and tight focusing leads to very high peak intensities, therefore allowing a precise two-photon interaction. It is crucial that the pulse duration of the radiation delivered to the sample is kept as short as possible. Here the low GVD of the Cr:Forsterite radiation in t ...
... The use of femtosecond pulses and tight focusing leads to very high peak intensities, therefore allowing a precise two-photon interaction. It is crucial that the pulse duration of the radiation delivered to the sample is kept as short as possible. Here the low GVD of the Cr:Forsterite radiation in t ...
TR555 - Princeton Instruments
... S1. Grating G1 disperses the light. Slit S1,2 acts as a bandpass filter, as it passes through only a narrow portion of the spectrum which is further dispersed on the grating G2. Light passing through the slit S2,3 is dispersed for a third time on the grating G3 and is projected on detector D. The di ...
... S1. Grating G1 disperses the light. Slit S1,2 acts as a bandpass filter, as it passes through only a narrow portion of the spectrum which is further dispersed on the grating G2. Light passing through the slit S2,3 is dispersed for a third time on the grating G3 and is projected on detector D. The di ...
1 Janaky Narayanan PC 5213 AY 2004
... absorbance of the two components, is a measure of Circular Dichroism (CD). i.e., CD = AL – AR The difference between L and R may be expressed as . From Beer-Lambert Law the difference in the absorbance of left and right circularly polarized light A, can be given by, A =cl. If or A or ell ...
... absorbance of the two components, is a measure of Circular Dichroism (CD). i.e., CD = AL – AR The difference between L and R may be expressed as . From Beer-Lambert Law the difference in the absorbance of left and right circularly polarized light A, can be given by, A =cl. If or A or ell ...
a PDF of the paper on this project published in the OCEANS 2005
... holograms at a rate of 15 frames per second, enabling the user to observe the behavior of marine plankton and distinguish motile organisms from abiotic particles. In order to follow the particles in time, the sample should have as little motion relative to the cameras as possible. To achieve this go ...
... holograms at a rate of 15 frames per second, enabling the user to observe the behavior of marine plankton and distinguish motile organisms from abiotic particles. In order to follow the particles in time, the sample should have as little motion relative to the cameras as possible. To achieve this go ...
Optical Properties of Silica-Copper Oxide Thin Films Prepared by Spin Coating
... For this project, three different types of models were studied. The first model, Cauchy dispersion with an Urbach absorption tail, is a combination of two empirical (mathematical) models where n and k are dealt with separately. This means that they do not necessarily fulfill the so called KramersKro ...
... For this project, three different types of models were studied. The first model, Cauchy dispersion with an Urbach absorption tail, is a combination of two empirical (mathematical) models where n and k are dealt with separately. This means that they do not necessarily fulfill the so called KramersKro ...
Why Optical Images are Easier to Understand Than Radar Images
... images are usually much more difficult to understand [1–3]. This paper will discuss about this issue and show the reasons. We know that the human eye’s vision system is similar to a camera, or in another words, the human eye is indeed a camera. The basic imaging principle of optical camera is “small ...
... images are usually much more difficult to understand [1–3]. This paper will discuss about this issue and show the reasons. We know that the human eye’s vision system is similar to a camera, or in another words, the human eye is indeed a camera. The basic imaging principle of optical camera is “small ...
Evidence for Two Different Solid Phases of Two-Dimensional Electrons in... * Z. H. Wang, Yong P. Chen, R. M. Lewis,
... would be a WS made of ‘‘bare’’ electrons, corresponding to the original case proposed in [2]. The theories [23,25] have predicted a series of first order phase transitions among these different types of CWSs as preferred ground states in different regimes of the HBIP, thus offering an attractive int ...
... would be a WS made of ‘‘bare’’ electrons, corresponding to the original case proposed in [2]. The theories [23,25] have predicted a series of first order phase transitions among these different types of CWSs as preferred ground states in different regimes of the HBIP, thus offering an attractive int ...
revised preliminary introduction of spectroscopy
... For organic chemistry, the most useful range of the infrared spectrum encompasses approximately 2.5 to 15 µm. Functional groups present in the molecules have characteristic vibrational frequencies, and the presence of an absorption band in the infrared spectrum is strong suggestive evidence that the ...
... For organic chemistry, the most useful range of the infrared spectrum encompasses approximately 2.5 to 15 µm. Functional groups present in the molecules have characteristic vibrational frequencies, and the presence of an absorption band in the infrared spectrum is strong suggestive evidence that the ...
class06
... • Light always reflects with an angle of reflection equal to the angle of incidence (angles are measured to the normal). • When light travels into a denser medium from a rarer medium, it slows down and bends toward the normal. • The Fourier spectrum of a wider pulse will be narrower than that of a n ...
... • Light always reflects with an angle of reflection equal to the angle of incidence (angles are measured to the normal). • When light travels into a denser medium from a rarer medium, it slows down and bends toward the normal. • The Fourier spectrum of a wider pulse will be narrower than that of a n ...
Enhancing The Near Field and Transmission Efficiency through
... slot and annular aperture have been studied to overcome such a low transmission efficiency problem. In general the transmission through a small coupling aperture and the spatial confinement of the electromagnetic energy are taken as two conflicting characteristics of the compromise problem which we ...
... slot and annular aperture have been studied to overcome such a low transmission efficiency problem. In general the transmission through a small coupling aperture and the spatial confinement of the electromagnetic energy are taken as two conflicting characteristics of the compromise problem which we ...
Laser multipass system with interior cell configuration
... losses. The alignment of the multipass cell without the sample vessel inside is straightforward and suitable to a laboratory environment as the entire system is in the open air and an experimenter can readily trace the laser beam’s path. However, once a sample cell is inserted in the central region, ...
... losses. The alignment of the multipass cell without the sample vessel inside is straightforward and suitable to a laboratory environment as the entire system is in the open air and an experimenter can readily trace the laser beam’s path. However, once a sample cell is inserted in the central region, ...