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Generation of a super-resolution laser beam producing an extremely small focal spot

Research Project

Project/Area Number 25790062
Research Category

Grant-in-Aid for Young Scientists (B)

Allocation TypeMulti-year Fund
Research Field Optical engineering, Photon science
Research InstitutionTohoku University

Principal Investigator

Kozawa Yuichi  東北大学, 多元物質科学研究所, 助教 (90509126)

Project Period (FY) 2013-04-01 – 2016-03-31
Project Status Completed (Fiscal Year 2015)
Budget Amount *help
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2014: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Fiscal Year 2013: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
Keywordsレーザー共振器 / 偏光 / レーザー顕微鏡 / レーザー / 高次横モード
Outline of Final Research Achievements

A laser beam with an annular-shape and radial polarization, which can produce a small focal spot, was generated directly from a laser cavity. The generation of an annular-shaped beam with radial polarization was demonstrated simply by the precise control of the cavity length and optics in a plane-concave cavity with a c-cut Nd:YVO4 crystal.
We also demonstrated a further simplified method that enables the manipulation of the intensity and polarization distribution of a laser beam by the fine structure of gold ring patterns fabricated on the surface of a laser crystal.
In addition, we investigated the image formation for a small scatterer illuminated by a radially polarized beam in laser microscopy, which revealed a new approach for the enhancement of the spatial resolution in laser microscopy using a radially polarized beam.

Report

(4 results)
  • 2015 Annual Research Report   Final Research Report ( PDF )
  • 2014 Research-status Report
  • 2013 Research-status Report
  • Research Products

    (26 results)

All 2015 2014 2013

All Journal Article (7 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 7 results,  Open Access: 2 results,  Acknowledgement Compliant: 2 results) Presentation (19 results) (of which Int'l Joint Research: 2 results,  Invited: 3 results)

  • [Journal Article] Transverse-mode selective laser operation by unicursal fast-scanning pumping2015

    • Author(s)
      Takumi Sato, Yuichi Kozawa, Shunichi Sato
    • Journal Title

      Optics Letters

      Volume: 40 Issue: 14 Pages: 3245-3248

    • DOI

      10.1364/ol.40.003245

    • Related Report
      2015 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Creation of polarization gradients from superposition of counter propagating vector LG beams2015

    • Author(s)
      Sunil Vyas, Yuichi Kozawa, Yoko Miyamoto
    • Journal Title

      Optics Express

      Volume: 23 Issue: 26 Pages: 33970-33979

    • DOI

      10.1364/oe.23.033970

    • Related Report
      2015 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Numerical analysis of resolution enhancement in laser scanning microscopy using a radially polarized beam2015

    • Author(s)
      Yuichi Kozawa and Shunichi Sato
    • Journal Title

      Optics Express

      Volume: 23 Issue: 3 Pages: 2076-2084

    • DOI

      10.1364/oe.23.002076

    • Related Report
      2014 Research-status Report
    • Peer Reviewed / Open Access / Acknowledgement Compliant
  • [Journal Article] High-power and highly efficient amplification of a radially polarized beam using an Yb-doped double-clad fiber2014

    • Author(s)
      Shinya Kanazawa, Yuichi Kozawa, and Shunichi Sato
    • Journal Title

      Optics Letters

      Volume: 39 Issue: 10 Pages: 2857-2859

    • DOI

      10.1364/ol.39.002857

    • Related Report
      2014 Research-status Report
    • Peer Reviewed
  • [Journal Article] Resolution enhancement of confocal microscopy by subtraction method with vector beams2014

    • Author(s)
      Susumu Segawa, Yuichi Kozawa, and Shunichi Sato
    • Journal Title

      Optics Letters

      Volume: 39 Issue: 11 Pages: 3118-3121

    • DOI

      10.1364/ol.39.003118

    • Related Report
      2014 Research-status Report
    • Peer Reviewed
  • [Journal Article] Demonstration of subtraction imaging in confocal microscopy with vector beams2014

    • Author(s)
      Susumu Segawa, Yuichi Kozawa, and Shunichi Sato
    • Journal Title

      Optics Letters

      Volume: 39 Issue: 15 Pages: 4529-4532

    • DOI

      10.1364/ol.39.004529

    • Related Report
      2014 Research-status Report
    • Peer Reviewed / Acknowledgement Compliant
  • [Journal Article] Generation of radially polarized Bessel-Gaussian beams from c-cut Nd:YVO4 laser2014

    • Author(s)
      Sunil Vyas, Yuichi Kozawa, and Shunichi Sato
    • Journal Title

      Optics Letters

      Volume: 39 Issue: 4 Pages: 1101-1104

    • DOI

      10.1364/ol.39.001101

    • Related Report
      2013 Research-status Report
    • Peer Reviewed
  • [Presentation] ベクトルビームの発生とレーザー顕微鏡への応用2015

    • Author(s)
      小澤 祐市
    • Organizer
      第2回機能性粉体プロセス研究会
    • Place of Presentation
      東北大学(宮城県仙台市)
    • Year and Date
      2015-11-16
    • Related Report
      2015 Annual Research Report
    • Invited
  • [Presentation] 軸方向電場を用いた共焦点イメージングにおける高空間分解能化2015

    • Author(s)
      小澤 祐市, 阪下 良太, 佐藤 俊一
    • Organizer
      第76回応用物理学会秋季学術講演会
    • Place of Presentation
      名古屋国際会議場(愛知県名古屋市)
    • Year and Date
      2015-09-13
    • Related Report
      2015 Annual Research Report
  • [Presentation] ベクトルビームの発生と超解像イメージング2015

    • Author(s)
      小澤 祐市
    • Organizer
      東北大学附置研究所若手アンサンブルワークショップ
    • Place of Presentation
      東北大学(宮城県仙台市)
    • Year and Date
      2015-07-23
    • Related Report
      2015 Annual Research Report
  • [Presentation] Smaller Spot Formation by Vector Beam for Higher Resolution Microscopy2015

    • Author(s)
      Shunichi Sato, Yuichi Kozawa
    • Organizer
      Conference on Lasers and Electro-Optics (CLEO 2015)
    • Place of Presentation
      San Jose, USA
    • Year and Date
      2015-05-10
    • Related Report
      2015 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Enhancement of Longitudinal Field of a Radially Polarized Beam in Confocal Laser Microscopy2015

    • Author(s)
      Yuichi Kozawa, Shunichi Sato
    • Organizer
      Conference on Lasers and Electro-Optics (CLEO 2015)
    • Place of Presentation
      San Jose, USA
    • Year and Date
      2015-05-10
    • Related Report
      2015 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 金リングパターンを持つNd:YVO4レーザー結晶の熱レンズ効果の検討2015

    • Author(s)
      角 剛,小澤祐市,佐藤俊一
    • Organizer
      応用物理学会春季学術講演会
    • Place of Presentation
      平塚市
    • Year and Date
      2015-03-11 – 2015-03-14
    • Related Report
      2014 Research-status Report
  • [Presentation] 高次径偏光ビームのスーパーオシレーション集光2015

    • Author(s)
      小澤祐市,松永大地,佐藤俊一
    • Organizer
      応用物理学会春季学術講演会
    • Place of Presentation
      平塚市
    • Year and Date
      2015-03-11 – 2015-03-14
    • Related Report
      2014 Research-status Report
  • [Presentation] 高次径偏光ビームのスーパーオシレーション特性による共焦点レーザー顕微鏡の空間分解能の向上2015

    • Author(s)
      松永大地,小澤祐市,佐藤俊一
    • Organizer
      応用物理学会春季学術講演会
    • Place of Presentation
      平塚市
    • Year and Date
      2015-03-11 – 2015-03-14
    • Related Report
      2014 Research-status Report
  • [Presentation] Direct generation of radially polarized beams from a Nd:YVO4 laser chip with a gold ring pattern2015

    • Author(s)
      Takeshi Sumi, Yuichi Kozawa, Shunichi Sato
    • Organizer
      Photonics West 2015
    • Place of Presentation
      San Francisco, USA
    • Year and Date
      2015-02-07 – 2015-02-12
    • Related Report
      2014 Research-status Report
  • [Presentation] 金リングパターンを持つNd:YVO4レーザー結晶からの径偏光LG11ビームの発振2014

    • Author(s)
      角剛, 小澤祐市, 佐藤俊一
    • Organizer
      応用物理学会東北支部学術講演会
    • Place of Presentation
      仙台
    • Year and Date
      2014-12-04 – 2014-12-05
    • Related Report
      2014 Research-status Report
  • [Presentation] 強く集光したビームの軸方向電場に起因した散乱光の観測2014

    • Author(s)
      小澤祐市,佐藤俊一
    • Organizer
      応用物理学会秋季学術講演会
    • Place of Presentation
      札幌
    • Year and Date
      2014-09-17 – 2014-09-20
    • Related Report
      2014 Research-status Report
  • [Presentation] 金リングパターンを持つNd:YVO4レーザー結晶からの径偏光ビーム発生2014

    • Author(s)
      角 剛, 小澤祐市, 佐藤俊一
    • Organizer
      応用物理学会秋季学術講演会
    • Place of Presentation
      札幌
    • Year and Date
      2014-09-17 – 2014-09-20
    • Related Report
      2014 Research-status Report
  • [Presentation] レーザー光におけるベクトルビーム発生と応用2014

    • Author(s)
      小澤祐市
    • Organizer
      放射光学会第6回若手研究会
    • Place of Presentation
      兵庫県佐用町
    • Year and Date
      2014-08-22 – 2014-08-23
    • Related Report
      2014 Research-status Report
    • Invited
  • [Presentation] Enhanced Spatial Resolution in Confocal Laser Microscopy by Subtractive Imaging Using Vector Beams2014

    • Author(s)
      Susumu Segawa, Yuichi Kozawa, Shunichi Sato
    • Organizer
      CLEO 2014
    • Place of Presentation
      San Jose, USA
    • Year and Date
      2014-06-08 – 2014-06-13
    • Related Report
      2014 Research-status Report
  • [Presentation] Generation of Vector Bessel-Gaussian Beams from a c-cut Nd:GdVO4 Laser Cavity2014

    • Author(s)
      Takeshi Sumi, Yuichi Kozawa, Shunichi Sato
    • Organizer
      Optical Manipulation Conference '14
    • Place of Presentation
      Yokohama
    • Year and Date
      2014-04-22 – 2014-04-24
    • Related Report
      2014 Research-status Report
  • [Presentation] c軸カットNd:YVO4レーザー共振器からの高次ベクトルベッセルガウスビームの発生2014

    • Author(s)
      角剛, 小澤祐市, 佐藤俊一
    • Organizer
      応用物理学会春季学術講演会
    • Place of Presentation
      青山学院大学(相模原市)
    • Related Report
      2013 Research-status Report
  • [Presentation] ベクトルビームを用いた差引法の生体試料への適用2014

    • Author(s)
      瀬川侑, 小澤祐市, 佐藤俊一
    • Organizer
      応用物理学会春季学術講演会
    • Place of Presentation
      青山学院大学(相模原市)
    • Related Report
      2013 Research-status Report
  • [Presentation] Generation of a radially polarized Bessel-Gauss beam from c-cut Nd:YVO4 laser2013

    • Author(s)
      Sunil Vyas, Yuichi Kozawa, Shunichi Sato
    • Organizer
      応用物理学会秋季学術講演会
    • Place of Presentation
      同志社大学(京田辺市)
    • Related Report
      2013 Research-status Report
  • [Presentation] ベクトルビームを用いた差引法による共焦点レーザー顕微鏡の空間分解能向上効果の検証2013

    • Author(s)
      瀬川侑, 小澤祐市, 佐藤俊一
    • Organizer
      応用物理学会秋季学術講演会
    • Place of Presentation
      同志社大学(京田辺市)
    • Related Report
      2013 Research-status Report

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Published: 2014-07-25   Modified: 2019-07-29  

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