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Laser tweezers and their applications
Laser tweezers and their applications

Introduction - Research
Introduction - Research

P - University of South Florida
P - University of South Florida

... Three-dimensional microscopic imaging that reveals the tomographic structure of biological tissues or other materials has a variety of applications in clinical and laboratory studies. Recently developed optical coherence tomography [1] (OCT) is a scanning microscopic technique that is suitable for h ...
Optics Ic
Optics Ic

Optical sampling technique applied to high resolution
Optical sampling technique applied to high resolution

... except for brief time intervals τ2. If the width τ2 of the optical gate is much shorter than the typical duration of the optical signal τ1, as shown in Fig. 1, only a brief fraction of the optical signal is sliced out in the time domain. A sample of duration τ2 is so sliced from the optical signal a ...
Laser Chemosensor with Rapid Responsivity and Inherent Memory
Laser Chemosensor with Rapid Responsivity and Inherent Memory

... There is currently a critical need for trace explosive detection due to the increased security issues and threats across the world. High-sensitivity detection techniques are needed to avoid missing potentially dangerous objects during routine checks at airports, government buildings and other places ...
Femto-Photography: Capturing and Visualizing the
Femto-Photography: Capturing and Visualizing the

Multiplexing in high-density optical data storage using the orbital
Multiplexing in high-density optical data storage using the orbital

... If l is an integer, the orbital angular momentum has been increased by an amount of l h . Of course, l does not have to be limited to integer values; in that case, the expectation value for the angular momentum simply takes on the analog value of l h . For the total beam, the angular momentum per un ...
Collective electronic states in inhomogeneous media at critical and subcritical... *
Collective electronic states in inhomogeneous media at critical and subcritical... *

Yellow nanosecond sum-frequency generating optical
Yellow nanosecond sum-frequency generating optical

15-Gb/s Bit-Interleaved Optical Backplane Bus Using Volume
15-Gb/s Bit-Interleaved Optical Backplane Bus Using Volume

... for 20 boards with 3-cm separation, the bandwidth limit is still in the order of terahertz. The serializer chip used in the demonstration has a 3.2-Gb/s throughput using ECL logic. The data rate can be improved using very simple dynamic logic if only the function of pulsewidth reduction is desired. ...
Scanning Electron Microscope - i-Explore International Research
Scanning Electron Microscope - i-Explore International Research

Nonlinear photoacoustic spectroscopy of hemoglobin
Nonlinear photoacoustic spectroscopy of hemoglobin

Micron-scale modifications of Si surface morphology by pulsed
Micron-scale modifications of Si surface morphology by pulsed

... Equation 共1兲 excludes the effects of lens aberrations. Although we have not quantified the aberrations of the objective lenses used in this study, in most cases light fills only a small fraction of the back-focal-plane aperture of the objective lens and therefore, the diffraction limit described by ...
Novel Machine Learning Approaches to Molecular Coherent Control
Novel Machine Learning Approaches to Molecular Coherent Control

... direct comparisons. Fig. 8 shows the best solution from 3 runs at 580 nm represented as delay functions. These functions are calculated as the derivative of the spectral phase and give a 1-D approximation to a Wigner function. Like many of the solutions obtained at other wavelengths, the optimal fun ...
Qn_Bank1
Qn_Bank1

OSA journals template (MSWORD)
OSA journals template (MSWORD)

Normal-Incidence Photoemission Electron Microscopy (NI
Normal-Incidence Photoemission Electron Microscopy (NI

... SPP modes have been evaluated [1, 2]. Several sophisticated microscopy techniques were developed to reveal the reliability of passive and active plasmonic elements. In addition to several near-field microscopy methods, nonlinear photoemission electron microscopy (PEEM) [3, 4] has, in the last years, ...
Optical Networks
Optical Networks

... Optical Components: Couplers, Isolators & Circulators, Multiplexers & Filters (Grating, Fiber Bragg Grating, Fabry-Perot Filters, Dielectric filters, Acousto-optic filter, etc.), Some Optical Amplifiers (Erbium-Doped Fiber Amplifiers, Raman Amplifiers, Semiconductor Optical Amplifiers), Switches (La ...
1.1 Objectives
1.1 Objectives

BioE 123 Teaching Material Stanford University
BioE 123 Teaching Material Stanford University

... “light rays.” The bending of light at interfaces between materials results in shifting in the direction of wavefronts and thus it is easy to use vectors to show where the peaks of the wavefronts will be headed. Rays are perpendicular to wavefronts. What is an image? Before we get into how lenses ben ...
four workable ways to determine the height of a tall building using a
four workable ways to determine the height of a tall building using a

... hit or “shoot” architects and building staff with it. As one reader pointed out, this may require plugging the laser into the wall for added authenticity. ...
Laser oscillation in proton implanted Nd:YAG waveguides
Laser oscillation in proton implanted Nd:YAG waveguides

... end-fire coupling technique. The output light was collected through a x20 microscope objective and directed to the entrance slit of a monochromator (ARC SpectraPro 500-i) being detected by using an InGaAs photodiode. A laser cavity was formed by butting mirrors to the polished end-faces of the waveg ...
Mechanical mapping with chemical specificity by confocal Brillouin
Mechanical mapping with chemical specificity by confocal Brillouin

... putatively due to water hydration. The evidence of hydrated (type I) collagen fibrils forming the extracellular matrix and of embedded epithelial cells was provided by Raman scattering spectra at a gland/connective tissue interface. The heterogeneity in tissue structure, stiffness and composition wa ...
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Super-resolution microscopy

Super-resolution microscopy is a form of light microscopy. Due to the diffraction of light, the resolution of conventional light microscopy is limited as stated by Ernst Abbe in 1873. A good approximation of the resolution attainable is the full width at half maximum (FWHM) of the point spread function, and a precise widefield microscope with high numerical aperture and visible light usually reaches a resolution of ~250 nm.Super-resolution techniques allow the capture of images with a higher resolution than the diffraction limit. They fall into two broad categories, ""true"" super-resolution techniques, which capture information contained in evanescent waves, and ""functional"" super-resolution techniques, which use clever experimental techniques and known limitations on the matter being imaged to reconstruct a super-resolution image.True subwavelength imaging techniques include those that utilize the Pendry Superlens and near field scanning optical microscopy, the 4Pi Microscope and structured illumination microscopy technologies like SIM and SMI. However, the majority of techniques of importance in biological imaging fall into the functional category.There are two major groups of methods for functional super-resolution microscopy: Deterministic super-resolution: The most commonly used emitters in biological microscopy, fluorophores, show a nonlinear response to excitation, and this nonlinear response can be exploited to enhance resolution. These methods include STED, GSD, RESOLFT and SSIM. Stochastic super-resolution: The chemical complexity of many molecular light sources gives them a complex temporal behaviour, which can be used to make several close-by fluorophores emit light at separate times and thereby become resolvable in time. These methods include SOFI and all single-molecule localization methods (SMLM) such as SPDM, SPDMphymod, PALM, FPALM, STORM and dSTORM.On October 8th, 2014, the Nobel Prize in Chemistry was awarded to Eric Betzig, W.E. Moerner and Stefan Hell for ""the development of super-resolved fluorescence microscopy,"" which brings ""optical microscopy into the nanodimension"".
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