Yuichi Kozawa

Summary

Affiliation: Tohoku University
Country: Japan

Publications

  1. doi request reprint Focusing of higher-order radially polarized Laguerre-Gaussian beam
    Yuichi Kozawa
    Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, Katahira 2 1 1, Sendai 980 8577, Japan
    J Opt Soc Am A Opt Image Sci Vis 29:2439-43. 2012
  2. doi request reprint Demonstration and selection of a single-transverse higher-order-mode beam with radial polarization
    Yuichi Kozawa
    Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, Katahira 2 1 1, Aoba ku, Sendai 980 8577, Japan
    J Opt Soc Am A Opt Image Sci Vis 27:399-403. 2010
  3. doi request reprint Optical trapping of micrometer-sized dielectric particles by cylindrical vector beams
    Yuichi Kozawa
    Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, Aoba ku, Sendai 980 8577, Japan
    Opt Express 18:10828-33. 2010
  4. doi request reprint Lateral resolution enhancement of laser scanning microscopy by a higher-order radially polarized mode beam
    Yuichi Kozawa
    Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, Katahira 2 1 1, Sendai 980 8577, Japan
    Opt Express 19:15947-54. 2011
  5. ncbi request reprint Amplification of a radially polarized laser beam using an Yb-doped double-clad fiber
    Tatsuya Chubachi
    Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, Sendai, Japan
    Opt Lett 34:716-8. 2009
  6. doi request reprint Self-healing of tightly focused scalar and vector Bessel-Gauss beams at the focal plane
    Sunil Vyas
    Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, Katahira 2 1 1, Aoba ku, Sendai 980 8577, Japan
    J Opt Soc Am A Opt Image Sci Vis 28:837-43. 2011
  7. doi request reprint Diffractive properties of obstructed vector Laguerre-Gaussian beam under tight focusing condition
    Sunil Vyas
    Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, Katahira 2 1 1, Sendai 980 8577, Japan
    J Opt Soc Am A Opt Image Sci Vis 28:1387-94. 2011
  8. doi request reprint Polarization singularities in superposition of vector beams
    Sunil Vyas
    Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, Katahira 2 1 1, Sendai 980 8577, Japan
    Opt Express 21:8972-86. 2013

Collaborators

Detail Information

Publications8

  1. doi request reprint Focusing of higher-order radially polarized Laguerre-Gaussian beam
    Yuichi Kozawa
    Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, Katahira 2 1 1, Sendai 980 8577, Japan
    J Opt Soc Am A Opt Image Sci Vis 29:2439-43. 2012
    ..The latter forms a dominant small spot of longitudinal electric field component near the focus, while the former mainly contributes to a weak annular pattern of radial component...
  2. doi request reprint Demonstration and selection of a single-transverse higher-order-mode beam with radial polarization
    Yuichi Kozawa
    Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, Katahira 2 1 1, Aoba ku, Sendai 980 8577, Japan
    J Opt Soc Am A Opt Image Sci Vis 27:399-403. 2010
    ..As predicted by theoretical analysis [A. A. Tovar, J. Opt. Soc. Am. A 15, 2705 (1998)], the intensity distribution and propagation characteristics of the higher-order radially polarized beams are expressed by a Laguerre-Gaussian formula...
  3. doi request reprint Optical trapping of micrometer-sized dielectric particles by cylindrical vector beams
    Yuichi Kozawa
    Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, Aoba ku, Sendai 980 8577, Japan
    Opt Express 18:10828-33. 2010
    ..On the other hand, the azimuthally polarized beam had a higher transverse trapping efficiency than the radially polarized beam. These results are consistent with numerical predictions...
  4. doi request reprint Lateral resolution enhancement of laser scanning microscopy by a higher-order radially polarized mode beam
    Yuichi Kozawa
    Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, Katahira 2 1 1, Sendai 980 8577, Japan
    Opt Express 19:15947-54. 2011
    ..This method can extend the capability of conventional laser scanning microscopes without modification of the system, with the exception of the addition of the liquid crystal devices in the optical path...
  5. ncbi request reprint Amplification of a radially polarized laser beam using an Yb-doped double-clad fiber
    Tatsuya Chubachi
    Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, Sendai, Japan
    Opt Lett 34:716-8. 2009
    ..The amplified spontaneous emission becomes negligible with increasing input power. The measured slope efficiency is 48%, and the output power is 1.1 W...
  6. doi request reprint Self-healing of tightly focused scalar and vector Bessel-Gauss beams at the focal plane
    Sunil Vyas
    Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, Katahira 2 1 1, Aoba ku, Sendai 980 8577, Japan
    J Opt Soc Am A Opt Image Sci Vis 28:837-43. 2011
    ..The effect of the size of the obstacle on recovery of polarization and intensity distribution is studied. The role of the beam size at the pupil plane is also discussed...
  7. doi request reprint Diffractive properties of obstructed vector Laguerre-Gaussian beam under tight focusing condition
    Sunil Vyas
    Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, Katahira 2 1 1, Sendai 980 8577, Japan
    J Opt Soc Am A Opt Image Sci Vis 28:1387-94. 2011
    ..A comparative study of the focusing and diffractive properties of vector Laguerre-Gaussian and vector Bessel-Gaussian beams has also been performed...
  8. doi request reprint Polarization singularities in superposition of vector beams
    Sunil Vyas
    Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, Katahira 2 1 1, Sendai 980 8577, Japan
    Opt Express 21:8972-86. 2013
    ..Novel intensity and polarization patterns obtained from the superposition of two vector LG beams may find applications in the field of molecular imaging, optical manipulation, atom optics, and optical lattices...