The Experts below are selected from a list of 300 Experts worldwide ranked by ideXlab platform

J N Yih - One of the best experts on this subject based on the ideXlab platform.

  • Angular distribution of Polarized Photon-pairs in a scattering medium with a Zeeman laser scanning confocal microscope.
    Journal of microscopy, 2006
    Co-Authors: H F Chang, C Chou, H F Yau, Y H Chan, J N Yih
    Abstract:

    A novel confocal microscope designed for use with turbid media is proposed. We use a Zeeman laser as the light source. Based on the properties of two-frequency Polarized Photon-pairs and the common-path feature of Polarized Photon-pairs with heterodyne detection employed in the proposed confocal microscope, three gatings (spatial filtering gating, polarization gating and spatial coherence gating) are thus simultaneously incorporated in the microscope. Experimental results for the angular distribution of Polarized Photon-pairs in a scattering medium indicate that polarization gating and spatial coherence gating preclude the detection of multiply scattered Photons, whereas the pinhole selects the least scattered Photon-pairs. Thus, better performance for axial resolution than can be obtained with a conventional confocal microscope is demonstrated experimentally. In addition, the proposed microscope is able to either look deeper into a turbid medium or work with a denser medium; furthermore, the axial resolution is improved.

  • Angular distribution of Polarized Photon‐pairs in a scattering medium with a Zeeman laser scanning confocal microscope
    Journal of Microscopy, 2006
    Co-Authors: H F Chang, C Chou, H F Yau, Y H Chan, J N Yih
    Abstract:

    A novel confocal microscope designed for use with turbid media is proposed. We use a Zeeman laser as the light source. Based on the properties of two-frequency Polarized Photon-pairs and the common-path feature of Polarized Photon-pairs with heterodyne detection employed in the proposed confocal microscope, three gatings (spatial filtering gating, polarization gating and spatial coherence gating) are thus simultaneously incorporated in the microscope. Experimental results for the angular distribution of Polarized Photon-pairs in a scattering medium indicate that polarization gating and spatial coherence gating preclude the detection of multiply scattered Photons, whereas the pinhole selects the least scattered Photon-pairs. Thus, better performance for axial resolution than can be obtained with a conventional confocal microscope is demonstrated experimentally. In addition, the proposed microscope is able to either look deeper into a turbid medium or work with a denser medium; furthermore, the axial resolution is improved.

E A Kuraev - One of the best experts on this subject based on the ideXlab platform.

  • electron positron pair production by linearly Polarized Photon in the nuclear field
    Physics Letters B, 2008
    Co-Authors: S Bakmaev, E A Kuraev, I Shapoval, Yu P Peresunko
    Abstract:

    Abstract Process of lepton pair production by Polarized Photon on nuclei can be used to measure the degree of linear polarization of high energy Photon. The differential cross section and the analyzing power are calculated with taking into account higher powers of expansion in Zα . Pure Coulomb and screened potential are considered. The results are illustrated in terms of asymmetry. The screening effect as well as the effect of higher orders expansion in Zα is shown to vanish in limit of pair emission angles exceeding m / ω .

  • Recoil proton distribution in high energy photoproduction processes
    The European Physical Journal C, 2007
    Co-Authors: E Bartos, E A Kuraev, Yu P Peresunko, E A Vinokurov
    Abstract:

    For high energy linearly Polarized Photon–proton scattering we have calculated the azimuthal and polar angle distributions on a recoil proton in the inclusive experimental setup. We have taken into account the production of lepton and pseudoscalar meson charged pairs in the point-like approximation. The typical values of the cross sections are of the order of hundreds of picobarn. The size of the polarization effects are of order of several percents. The results are generalized for the case of electroproduction processes on the proton at rest and for a high energy proton production process on a resting proton.

  • QED processes in peripheral kinematics at Polarized Photon–Photon and Photon–electron colliders
    European Physical Journal C, 2007
    Co-Authors: S Bakmaev, E A Kuraev, Erik Bartoš, M. Galinskii
    Abstract:

    The calibration QED process cross sections for experiments on planned electron–Photon and Photon–Photon colliders for detecting small angle scattered particles are calculated. These processes describe the creation of two jets moving sufficiently close to the beam axis directions. The jets containing two and three particles including charged leptons, Photons, and pseudoscalar mesons are considered explicitly. Considering the pair production subprocesses we take into account both bremsstrahlung and double Photon mechanisms. The obtained results are suitable for further numerical calculations.

  • recoil proton distribution in high energy photoproduction processes
    arXiv: High Energy Physics - Phenomenology, 2006
    Co-Authors: E Bartos, E A Kuraev, Yu P Peresunko, E A Vinokurov
    Abstract:

    For high energy linearly Polarized Photon--proton scattering we have calculated the azimuthal and polar angle distributions in inclusive on recoil proton experimental setup. We have taken into account the production of lepton and pseudoscalar meson charged pairs. The typical values of cross sections are of order of hundreds of picobarn. The size of polarization effects are of order of several percents. The results are generalized for the case of electroproduction processes on the proton at rest and for high energy proton production process on resting proton.

  • the lowest order inelastic qed processes at Polarized Photon electron high energy collisions
    Nuclear Physics, 2004
    Co-Authors: E Bartos, M V Galynskii, S R Gevorkyan, E A Kuraev
    Abstract:

    The compact expressions for cross sections of photoproduction of a pair of charged particles e + , e − ; µ + ,µ − ; π + ,π − as well as the double Compton scattering process are given. The explicit analytic expressions for the case of Polarized Photon and the initial electron in the kinematics when all the particles can be considered as a massless ones are presented. Photon polarization is described in terms of Stokes parameters.

C Chou - One of the best experts on this subject based on the ideXlab platform.

  • Polarized Photon-pairs confocal laser scanning microscope
    2009 14th OptoElectronics and Communications Conference, 2009
    Co-Authors: Chi-hui Chang, Li-pingyu, Li-dek Chou, Huan-jang Huang, Cheng-chung Lee, C Chou
    Abstract:

    The abilities of reducing spherical aberration and enhancing image contrast of a Polarized Photon-pairs confocal laser scanning microscope (PCLSM) have been investigated. The axial responses of PCLSM are compared with that of CLSM.

  • Polarized Photon pairs heterodyne polarimetry for ultrasensitive optical activity detection of a chiral medium
    Journal of Physical Chemistry B, 2007
    Co-Authors: C Chou, Kunhuei Chiang, Kuanyung Liao, Yingfeng Chang, Chuen Lin
    Abstract:

    A Polarized Photon-pairs heterodyne polarimetry is proposed in order to measure in an ultrasensitive manner the circular birefringence of a chiral medium via optical rotation detection. A balanced detector is integrated into this polarimeter. Thus, shot-noise-limited detection by this polarimeter can be achieved. Experimentally, the detection sensitivity for the circular birefringence of a glucose−water solution up to ∂ |nr − nl| = 2 × 10-11 at 10 mg/dL is verified. To our knowledge, this is the highest sensitivity ever measured of a chiral liquid solution based on single traveling sample cell geometry. Finally, when compared to a fiber loop ring-resonator in the frequency domain for a chiral liquid, this polarimeter shows an order of 104 enhancement on the sensitivity of natural optical activity measurement.

  • Angular distribution of Polarized Photon-pairs in a scattering medium with a Zeeman laser scanning confocal microscope.
    Journal of microscopy, 2006
    Co-Authors: H F Chang, C Chou, H F Yau, Y H Chan, J N Yih
    Abstract:

    A novel confocal microscope designed for use with turbid media is proposed. We use a Zeeman laser as the light source. Based on the properties of two-frequency Polarized Photon-pairs and the common-path feature of Polarized Photon-pairs with heterodyne detection employed in the proposed confocal microscope, three gatings (spatial filtering gating, polarization gating and spatial coherence gating) are thus simultaneously incorporated in the microscope. Experimental results for the angular distribution of Polarized Photon-pairs in a scattering medium indicate that polarization gating and spatial coherence gating preclude the detection of multiply scattered Photons, whereas the pinhole selects the least scattered Photon-pairs. Thus, better performance for axial resolution than can be obtained with a conventional confocal microscope is demonstrated experimentally. In addition, the proposed microscope is able to either look deeper into a turbid medium or work with a denser medium; furthermore, the axial resolution is improved.

  • Angular distribution of Polarized Photon‐pairs in a scattering medium with a Zeeman laser scanning confocal microscope
    Journal of Microscopy, 2006
    Co-Authors: H F Chang, C Chou, H F Yau, Y H Chan, J N Yih
    Abstract:

    A novel confocal microscope designed for use with turbid media is proposed. We use a Zeeman laser as the light source. Based on the properties of two-frequency Polarized Photon-pairs and the common-path feature of Polarized Photon-pairs with heterodyne detection employed in the proposed confocal microscope, three gatings (spatial filtering gating, polarization gating and spatial coherence gating) are thus simultaneously incorporated in the microscope. Experimental results for the angular distribution of Polarized Photon-pairs in a scattering medium indicate that polarization gating and spatial coherence gating preclude the detection of multiply scattered Photons, whereas the pinhole selects the least scattered Photon-pairs. Thus, better performance for axial resolution than can be obtained with a conventional confocal microscope is demonstrated experimentally. In addition, the proposed microscope is able to either look deeper into a turbid medium or work with a denser medium; furthermore, the axial resolution is improved.

E Bartos - One of the best experts on this subject based on the ideXlab platform.

  • Recoil proton distribution in high energy photoproduction processes
    The European Physical Journal C, 2007
    Co-Authors: E Bartos, E A Kuraev, Yu P Peresunko, E A Vinokurov
    Abstract:

    For high energy linearly Polarized Photon–proton scattering we have calculated the azimuthal and polar angle distributions on a recoil proton in the inclusive experimental setup. We have taken into account the production of lepton and pseudoscalar meson charged pairs in the point-like approximation. The typical values of the cross sections are of the order of hundreds of picobarn. The size of the polarization effects are of order of several percents. The results are generalized for the case of electroproduction processes on the proton at rest and for a high energy proton production process on a resting proton.

  • recoil proton distribution in high energy photoproduction processes
    arXiv: High Energy Physics - Phenomenology, 2006
    Co-Authors: E Bartos, E A Kuraev, Yu P Peresunko, E A Vinokurov
    Abstract:

    For high energy linearly Polarized Photon--proton scattering we have calculated the azimuthal and polar angle distributions in inclusive on recoil proton experimental setup. We have taken into account the production of lepton and pseudoscalar meson charged pairs. The typical values of cross sections are of order of hundreds of picobarn. The size of polarization effects are of order of several percents. The results are generalized for the case of electroproduction processes on the proton at rest and for high energy proton production process on resting proton.

  • the lowest order inelastic qed processes at Polarized Photon electron high energy collisions
    Nuclear Physics, 2004
    Co-Authors: E Bartos, M V Galynskii, S R Gevorkyan, E A Kuraev
    Abstract:

    The compact expressions for cross sections of photoproduction of a pair of charged particles e + , e − ; µ + ,µ − ; π + ,π − as well as the double Compton scattering process are given. The explicit analytic expressions for the case of Polarized Photon and the initial electron in the kinematics when all the particles can be considered as a massless ones are presented. Photon polarization is described in terms of Stokes parameters.

  • Calibration processes for Photon–Photon colliders
    Nuclear Physics B, 2004
    Co-Authors: E Bartos, M V Galynskii, Anna Zuzana Dubnickova, E A Kuraev
    Abstract:

    Processes with creation of a pair charged particles with emission of hard Photon and two pairs of charged particles are considered for colliding partially Polarized Photon Photon beams. The effects of circular and linear polarization of the initial Photons are discussed in more details.Comment: LaTeX2e, 11 pages, 1 eps figur

H F Chang - One of the best experts on this subject based on the ideXlab platform.

  • Angular distribution of Polarized Photon-pairs in a scattering medium with a Zeeman laser scanning confocal microscope.
    Journal of microscopy, 2006
    Co-Authors: H F Chang, C Chou, H F Yau, Y H Chan, J N Yih
    Abstract:

    A novel confocal microscope designed for use with turbid media is proposed. We use a Zeeman laser as the light source. Based on the properties of two-frequency Polarized Photon-pairs and the common-path feature of Polarized Photon-pairs with heterodyne detection employed in the proposed confocal microscope, three gatings (spatial filtering gating, polarization gating and spatial coherence gating) are thus simultaneously incorporated in the microscope. Experimental results for the angular distribution of Polarized Photon-pairs in a scattering medium indicate that polarization gating and spatial coherence gating preclude the detection of multiply scattered Photons, whereas the pinhole selects the least scattered Photon-pairs. Thus, better performance for axial resolution than can be obtained with a conventional confocal microscope is demonstrated experimentally. In addition, the proposed microscope is able to either look deeper into a turbid medium or work with a denser medium; furthermore, the axial resolution is improved.

  • Angular distribution of Polarized Photon‐pairs in a scattering medium with a Zeeman laser scanning confocal microscope
    Journal of Microscopy, 2006
    Co-Authors: H F Chang, C Chou, H F Yau, Y H Chan, J N Yih
    Abstract:

    A novel confocal microscope designed for use with turbid media is proposed. We use a Zeeman laser as the light source. Based on the properties of two-frequency Polarized Photon-pairs and the common-path feature of Polarized Photon-pairs with heterodyne detection employed in the proposed confocal microscope, three gatings (spatial filtering gating, polarization gating and spatial coherence gating) are thus simultaneously incorporated in the microscope. Experimental results for the angular distribution of Polarized Photon-pairs in a scattering medium indicate that polarization gating and spatial coherence gating preclude the detection of multiply scattered Photons, whereas the pinhole selects the least scattered Photon-pairs. Thus, better performance for axial resolution than can be obtained with a conventional confocal microscope is demonstrated experimentally. In addition, the proposed microscope is able to either look deeper into a turbid medium or work with a denser medium; furthermore, the axial resolution is improved.