The Experts below are selected from a list of 276 Experts worldwide ranked by ideXlab platform

Yongkeun Park - One of the best experts on this subject based on the ideXlab platform.

  • Computational approach to dark-field Optical Diffraction tomography
    APL Photonics, 2020
    Co-Authors: Taean Chang, Seungwoo Shin, Yongkeun Park
    Abstract:

    The measurement of three-dimensional (3D) images and the analysis of subcellular organelles are crucial for the study of the pathophysiology of cells and tissues. Optical Diffraction tomography (OD...

  • Three-Dimensional Label-Free Characterization of Frog Erythrocytes using Optical Diffraction Tomography
    2018 IEEE Photonics Conference (IPC), 2018
    Co-Authors: Daeheon Kwon, Seongyeon Youn, Jonghun Shin, Yongkeun Park
    Abstract:

    Amphibian erythrocytes have cellular structures distinct from mammalian erythrocytes, yet have not been investigated in details. Here, we access the structures of live frog erythrocytes in three-dimension using Optical Diffraction tomography.

  • time multiplexed structured illumination using a dmd for Optical Diffraction tomography
    Optics Letters, 2017
    Co-Authors: Seungwoo Shin, Yongkeun Park
    Abstract:

    We present a time-multiplexing structured illumination control technique for Optical Diffraction tomography (ODT). Instead of tilting the angle of illumination, time-multiplexed sinusoidal illumination is exploited using a digital micromirror device (DMD). The present method effectively eliminates unwanted diffracted beams from binary DMD patterns, which deteriorates the image quality of the ODT in the previous binary Lee hologram method. We experimentally show the feasibility and advantage of the present method by reconstructing three-dimensional refractive index distributions of various samples and comparing with a conventional Lee hologram method.

  • Optical Diffraction tomography techniques for the study of cell pathophysiology
    Journal of Biomedical Photonics & Engineering, 2016
    Co-Authors: Jonghee Yoon, Seungwoo Shin, Sua Yang, Yongkeun Park
    Abstract:

    Three-dimensional imaging of biological cells is crucial for the investigation of cell biology, providing valuable information to reveal the mechanisms behind pathophysiology of cells and tissues. Recent advances in Optical Diffraction tomography (ODT) have demonstrated the potential for the study of various cells with its unique advantages of quantitative and label-free imaging capability. To provide insight on this rapidly growing field of research and to discuss its applications in biology and medicine, we present the summary of the ODT principle and highlight recent studies utilizing ODT with the emphasis on the applications to the pathophysiology of cells.

  • Optical Diffraction tomography techniques for the study of cell pathophysiology
    arXiv: Biological Physics, 2016
    Co-Authors: Jonghee Yoon, Seungwoo Shin, Sua Yang, Yongkeun Park
    Abstract:

    Three-dimensional imaging of biological cells is crucial for the investigation of cell biology, provide valuable information to reveal the mechanisms behind pathophysiology of cells and tissues. Recent advances in Optical Diffraction tomography (ODT) have demonstrated the potential for the study of various cells with its unique advantages of quantitative and label-free imaging capability. To provide insight on this rapidly growing field of research and to discuss its applications in biology and medicine, we present the summary of the ODT principle and highlight recent studies utilizing ODT with the emphasis on the applications to the pathophysiology of cells.

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

  • Nonlinear Magneto-Optical Diffraction by Periodic Magnetic Domain Structures: Effects of Magnetic Field
    Magnetoelectric Interaction Phenomena in Crystals, 2020
    Co-Authors: N. N. Dadoenkova, Igor L. Lyubchanskii, M.i. Lyubchanskii, E. A. Shapovalov, A.e. Zabolotin, Th. Rasing
    Abstract:

    Nonlinear (at the second harmonic frequency of the incident light) Optical Diffraction by twodimensional lattice of magnetic bubbles (cylindrical magnetic domains) is theoretically studied. Because the periods of these structures are comparable with the wavelengths of the fundamental and the second harmonic radiation, it would be possible to observe Diffraction at the second harmonic frequency. We investigate the influence of the value of external magnetic field on the nonlinear magneto-Optical Diffraction behavior.

  • Nonlinear acousto-Optical Diffraction: comparison of direct and cascading pr
    2015
    Co-Authors: Yu. S. Dadoenkova, N. N. Dadoenkova, F.f.l. Bentivegna, Igor L. Lyubchanskii
    Abstract:

    We theoretically investigate cascading processes for the nonlinear acousto-Optical Diffraction by standing acoustic waves in a noncentrosymmetric bulk crystal, resulting from the succession of either linear acousto-optic Diffraction and sum-frequency generation, or second harmonic generation and linear acousto-optic Diffraction. We carefully study the configurations and polarization combinations that allow to distinguish these processes and the direct process of nonlinear acousto-Optical Diffraction.

  • Nonlinear Optical Diffraction by standing acoustic waves in a gaas film
    Photonics and Nanostructures: Fundamentals and Applications, 2012
    Co-Authors: Nikita A. Shevchenko, N. N. Dadoenkova, F.f.l. Bentivegna, I.l. Lyubchanskii, Theo Rasing
    Abstract:

    Abstract Second-order nonlinear Optical Diffraction by standing acoustic waves in a crystalline plate is theoretically investigated. A detailed analysis of the polarization state of the second-harmonic light diffracted by both longitudinal and transversal acoustic waves is carried out. It is shown that longitudinal standing acoustic waves only allow p-polarized nonlinear Optical Diffraction, irrespective of the incoming state of polarization, whereas transversal standing acoustic waves allow all possible combinations of incoming and diffracted polarization states. Numerical estimates of the relative intensities of nonlinearly diffracted radiation peaks are made for a GaAs plate.

  • Nonlinear acousto-Optical Diffraction by standing acoustic waves
    2012
    Co-Authors: Igor L. Lyubchanskii, N. N. Dadoenkova, F.f.l. Bentivegna, Nikita A. Shevchenko, Th. Rasing
    Abstract:

    In this communication, we present a theoretical investigation of second-order nonlinear Optical Diffraction by standing acoustic waves in a thin crystalline plate. A detailed analysis of the polarization state of the second-harmonic light diffracted by both bulk and surface acoustic waves is carried out. Numerical estimates of the relative intensities of the nonlinearly diffracted orders are made for an AlGaAs film deposited on a GaAs substrate.

  • Nonlinear Optical Diffraction by Standing Acoustic Waves in a GaAs Film
    2011
    Co-Authors: Nikita A. Shevchenko, N. N. Dadoenkova, F.f.l. Bentivegna, I.l. Lyubchanskii, Theo Rasing
    Abstract:

    The second‐order nonlinear Optical Diffraction by standing acoustic waves in a crystalline thin film is theoretically investigated. A detailed analysis of the polarization state of the second‐harmonic light diffracted by both longitudinal and transversal acoustic waves is carried out. Numerical estimates of the relative intensities of nonlinearly diffracted radiation peaks are made for a GaAs thin film.

Igor L. Lyubchanskii - One of the best experts on this subject based on the ideXlab platform.

Theo Rasing - One of the best experts on this subject based on the ideXlab platform.

  • Nonlinear Optical Diffraction by standing acoustic waves in a gaas film
    Photonics and Nanostructures: Fundamentals and Applications, 2012
    Co-Authors: Nikita A. Shevchenko, N. N. Dadoenkova, F.f.l. Bentivegna, I.l. Lyubchanskii, Theo Rasing
    Abstract:

    Abstract Second-order nonlinear Optical Diffraction by standing acoustic waves in a crystalline plate is theoretically investigated. A detailed analysis of the polarization state of the second-harmonic light diffracted by both longitudinal and transversal acoustic waves is carried out. It is shown that longitudinal standing acoustic waves only allow p-polarized nonlinear Optical Diffraction, irrespective of the incoming state of polarization, whereas transversal standing acoustic waves allow all possible combinations of incoming and diffracted polarization states. Numerical estimates of the relative intensities of nonlinearly diffracted radiation peaks are made for a GaAs plate.

  • Nonlinear acousto-Optical Diffraction by surface and bulk standing acoustic waves
    2012 14th International Conference on Transparent Optical Networks (ICTON), 2012
    Co-Authors: Igor L. Lyubchanskii, Nikita A. Shevchenko, Nataliya N. Dadoenkova, Florian F.l. Bentivegna, Theo Rasing
    Abstract:

    In this communication, we present a theoretical investigation of second-order nonlinear Optical Diffraction by standing acoustic waves in a thin crystalline plate. A detailed analysis of the polarization state of the second-harmonic light diffracted by both bulk and surface acoustic waves is carried out. Numerical estimates of the relative intensities of the nonlinearly diffracted orders are made for an AlGaAs film deposited on a GaAs substrate.

  • Nonlinear Optical Diffraction by Standing Acoustic Waves in a GaAs Film
    2011
    Co-Authors: Nikita A. Shevchenko, N. N. Dadoenkova, F.f.l. Bentivegna, I.l. Lyubchanskii, Theo Rasing
    Abstract:

    The second‐order nonlinear Optical Diffraction by standing acoustic waves in a crystalline thin film is theoretically investigated. A detailed analysis of the polarization state of the second‐harmonic light diffracted by both longitudinal and transversal acoustic waves is carried out. Numerical estimates of the relative intensities of nonlinearly diffracted radiation peaks are made for a GaAs thin film.

  • Influence of magnetic field on nonlinear magneto-Optical Diffraction on two-dimensional hexagonal magnetic bubble lattice
    Journal of The Optical Society of America B-optical Physics, 2005
    Co-Authors: N. N. Dadoenkova, Igor L. Lyubchanskii, M.i. Lyubchanskii, E. A. Shapovalov, A.e. Zabolotin, Theo Rasing
    Abstract:

    The nonlinear (at the second-harmonic frequency of the incident light) Optical Diffraction by a two-dimensional lattice of magnetic bubbles (cylindrical magnetic domains) is theoretically studied. Because the periods of these structures are comparable with the wavelengths of the fundamental and the second-harmonic radiation, Diffraction at the second-harmonic frequency can be expected. We investigate the influence of an external magnetic field on the nonlinear magneto-Optical Diffraction.

Seungwoo Shin - One of the best experts on this subject based on the ideXlab platform.

  • Computational approach to dark-field Optical Diffraction tomography
    APL Photonics, 2020
    Co-Authors: Taean Chang, Seungwoo Shin, Yongkeun Park
    Abstract:

    The measurement of three-dimensional (3D) images and the analysis of subcellular organelles are crucial for the study of the pathophysiology of cells and tissues. Optical Diffraction tomography (OD...

  • time multiplexed structured illumination using a dmd for Optical Diffraction tomography
    Optics Letters, 2017
    Co-Authors: Seungwoo Shin, Yongkeun Park
    Abstract:

    We present a time-multiplexing structured illumination control technique for Optical Diffraction tomography (ODT). Instead of tilting the angle of illumination, time-multiplexed sinusoidal illumination is exploited using a digital micromirror device (DMD). The present method effectively eliminates unwanted diffracted beams from binary DMD patterns, which deteriorates the image quality of the ODT in the previous binary Lee hologram method. We experimentally show the feasibility and advantage of the present method by reconstructing three-dimensional refractive index distributions of various samples and comparing with a conventional Lee hologram method.

  • Optical Diffraction tomography techniques for the study of cell pathophysiology
    Journal of Biomedical Photonics & Engineering, 2016
    Co-Authors: Jonghee Yoon, Seungwoo Shin, Sua Yang, Yongkeun Park
    Abstract:

    Three-dimensional imaging of biological cells is crucial for the investigation of cell biology, providing valuable information to reveal the mechanisms behind pathophysiology of cells and tissues. Recent advances in Optical Diffraction tomography (ODT) have demonstrated the potential for the study of various cells with its unique advantages of quantitative and label-free imaging capability. To provide insight on this rapidly growing field of research and to discuss its applications in biology and medicine, we present the summary of the ODT principle and highlight recent studies utilizing ODT with the emphasis on the applications to the pathophysiology of cells.

  • Optical Diffraction tomography techniques for the study of cell pathophysiology
    arXiv: Biological Physics, 2016
    Co-Authors: Jonghee Yoon, Seungwoo Shin, Sua Yang, Yongkeun Park
    Abstract:

    Three-dimensional imaging of biological cells is crucial for the investigation of cell biology, provide valuable information to reveal the mechanisms behind pathophysiology of cells and tissues. Recent advances in Optical Diffraction tomography (ODT) have demonstrated the potential for the study of various cells with its unique advantages of quantitative and label-free imaging capability. To provide insight on this rapidly growing field of research and to discuss its applications in biology and medicine, we present the summary of the ODT principle and highlight recent studies utilizing ODT with the emphasis on the applications to the pathophysiology of cells.