Institute of Multidisciplinary Research for Advanced Materials, Tohoku University


LAST UPDATE 2021/05/03

  • 研究者氏名
    Researcher Name

    小澤祐市 Yuichi KOZAWA
    准教授 Associate Professor
  • 所属
    Professional Affiliation

    Institute of Multidisciplinary Research for Advanced Materials, Tohoku University

    プロセスシステム工学研究部門 光物質科学研究分野
    Division of Process and System Engineering, Laser Applied Material Science
  • 研究キーワード
    Research Keywords

    Optical engineering
    Laser science
    Super-resolution imaging
Research Subject
Development of methods to control the spatial distribution of intensity, polarization, and phase of laser beams and its application

研究の背景 Background


The intensity, polarization, and phase of light are the most fundamental properties of light. Recent studies reveal that the precise control of those parameters on the cross-section of a light beam is able to produce novel features that were not achievable by conventional beams. The laser beam, referred to as vector beam, is expected to be useful in a wide variety of applications including laser microscopy, laser processing, and high-accuracy measurement in material and life sciences.

研究の目標 Outcome


The research subject is to develop a generation method of vector beams with high beam quality and high efficiency. In addition, theoretical and experimental investigations of novel characteristics of vector beams are performed. My research interest also includes the development of super-resolution laser microscopy utilizing the smaller focal spot formation of a tightly focused vector beam.

研究図Research Figure

Fig.1. Focusing properties of vector beam. Fig.2. Smaller focal spot formation by higherorder radially polarized Laguerre-Gaussian beams under tight focusing conditions. Fig.3. Enhanced spatial resolution in confocal laser scanning microscopy using a vector beam.

文献 / Publications

J. Opt. Soc. Am. A 29, 2439 (2012). Microscopy 63, 23 (2014). Opt. Lett. 39, 3118 (2014). Opt. Lett. 39, 4529 (2014). Opt. Express 22, 28215 (2014). Opt. Express 23, 2076 (2015).