Prof. Takeo Sasaki Profile

Prof. Takeo Sasaki

Professor at Tokyo Univ of Science

SPIE Involvement:

Conference Program Committee | Author

Area of Expertise:

photorefractive effect , liquid crystals , light amplification , polymers , laser ultrasonics

Profile Summary

Born in 1965, Takeo Sasaki has been a professor at the Department of Chemistry, Tokyo University of Science, since 2000. He received his doctorate from the Tokyo Institute of Technology in 1994. He conducts research on photorefractive liquid crystals and photopolymers. He received the SPSJ Wiley Award (2004) from the Society of Polymer Science, Japan, and Senior Membership of SPIE (2016), and the JLCS Award for Outstanding Achievement from The Japanese Liquid Crystals Society (2023).
Takeo Sasaki is currently an editor of Molecular Crystals and Liquid Crystals (Taylor&Francis).
His current research interests include the photorefractive effects of organic materials and the synthesis of novel liquid crystalline materials.

Publications (26)

Proceedings Article | 30 September 2024 Presentation + Paper

Presentation + Paper

Inspection of internal structures of objects by laser ultrasonics using photorefractive liquid crystals

Takeo Sasaki, Ryoji Masuzawa, Ryouta Machida, Yoshikaze Umebayashi, Miku Nagaoka, Junko Watanabe, Khoa Van Le, Yumiko Naka

Proceedings Volume 13121, 1312107 (2024) https://doi.org/10.1117/12.3026072

KEYWORDS: Laser ultrasonics, Liquid crystals, Aluminum, Pulsed laser operation, Laser irradiation, Vibration, Pulse signals, Reflection, Acoustic waves, Signal detection

Read Abstract +

Proceedings Article | 18 June 2024 Presentation + Paper

Presentation + Paper

Preparation of fast-response photorefractive liquid crystals and their application to coaxial optical laser ultrasonics

Takeo Sasaki, Miku Nagaoka, Junko Watanabe, Yoshikaze Umebayashi, Ryouta Machida, Ryoji Masuzawa, Yumiko Naka, Khoa Le

Proceedings Volume 13015, 130150X (2024) https://doi.org/10.1117/12.3022041

KEYWORDS: Laser ultrasonics, Liquid crystals, Laser irradiation, Vibration, Pulsed laser operation, Aluminum, Reflection, Pulse signals, Acoustic waves, Refractive index

Read Abstract +

Proceedings Article | 13 March 2024 Presentation + Paper

Presentation + Paper

Synthesis of low-order liquid-crystalline viologens and their photo-responsive behavior

Yumiko Naka, Khoa Le, Takeo Sasaki

Proceedings Volume 12907, 1290703 (2024) https://doi.org/10.1117/12.3000664

KEYWORDS: Liquid crystals, Molecules, Molecular interactions, Materials properties

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Proceedings Article | 11 March 2024 Paper

Paper

Detection of phase change of light using photorefractive liquid crystals and their application to laser ultrasonics

Takeo Sasaki, Toshinobu Takashi, Yukihiro Ishii, Khoa Van Le, Yumiko Naka

Proceedings Volume 12883, 1288305 (2024) https://doi.org/10.1117/12.3005672

KEYWORDS: Laser ultrasonics, Liquid crystals, Laser irradiation, Vibration, Reflection, Pulse signals, Acoustic waves, Refractive index

Read Abstract +

Proceedings Article | 29 September 2023 Poster + Paper

Poster + Paper

Laser ultrasonics using photorefractive liquid crystals

Takeo Sasaki, Toshinobu Takashi, Kaita Suzuki, Gouta Ikeda, Miku Nagaoka, Yukihiro Ishii, Khoa Van Le, Yumiko Naka

Proceedings Volume 12658, 126580J (2023) https://doi.org/10.1117/12.2676230

KEYWORDS: Laser ultrasonics, Liquid crystals, Laser irradiation, Vibration, Pulsed laser operation, Aluminum, Reflection, Pulse signals, Acoustic waves, Refractive index

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Proceedings Article | 31 May 2023 Presentation + Paper

Presentation + Paper

Laser ultrasonics for measurement of the thickness of metal plates using a photorefractive liquid crystal

Takeo Sasaki, Toshinobu Takashi, Gouta Ikeda, Junko Watanabe, Miku Nagaoka, Shinnosuke Yamazaki, Yumiko Naka, Khoa Van Le

Proceedings Volume 12574, 1257408 (2023) https://doi.org/10.1117/12.2664898

KEYWORDS: Liquid crystals, Laser ultrasonics, Aluminum, Vibration, Photorefraction, Electric fields, Signal intensity, Acoustic waves, Mixtures, Laser irradiation

Read Abstract +

Proceedings Article | 3 October 2022 Presentation + Paper

Presentation + Paper

Photorefractive effect of smectic liquid crystals and their application to laser ultrasonic remote sensing

Takeo Sasaki, Takaaki Yagami, Toshinobu Takashi, Kaita Suzuki, Gouta Ikeda, Yukihiro Ishii, Khoa Le, Yumiko Naka

Proceedings Volume 12207, 1220702 (2022) https://doi.org/10.1117/12.2633374

KEYWORDS: Liquid crystals, Ultrasonics, Photorefraction, Refractive index, Aluminum, Wave plates, Laser irradiation, Holograms, Environmental sensing, Electrons

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Proceedings Article | 24 May 2022 Presentation + Paper

Presentation + Paper

Photorefractive effect of smectic liquid crystals and their application to laser ultrasonic remote sensing

Takeo Sasaki, Takaaki Yagami, Toshinobu Takashi, Khoa Van Le, Yumiko Naka

Proceedings Volume 12151, 121510B (2022) https://doi.org/10.1117/12.2620786

KEYWORDS: Liquid crystals, Ultrasonics, Photorefraction, Remote sensing, Refractive index, Aluminum, Wave plates, Pulsed laser operation, Laser irradiation, Electrons

Read Abstract +

Proceedings Article | 1 April 2020 Paper

Paper

Effect of chiral concentration of chiral smectic C liquid crystal mixture on the photorefractive property

Takeo Sasaki

Proceedings Volume 11367, 113670V (2020) https://doi.org/10.1117/12.2554925

KEYWORDS: Liquid crystals, Photorefraction, Molecules, Polarization, Refractive index, Temperature metrology, Chromophores, Ferroelectric LCDs, Electrons, Dielectric polarization

Read Abstract +

Proceedings Article | 23 April 2019 Presentation + Paper

Presentation + Paper

Photorefractive effect of smectic-C liquid crystals containing a small amount of chiral compounds

Takeo Sasaki

Proceedings Volume 11030, 110300M (2019) https://doi.org/10.1117/12.2520413

KEYWORDS: Liquid crystals, Photorefraction, Molecules, Refractive index, Polarization, Temperature metrology, Dielectric polarization, Electrons, Chromophores, Electro optics

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Proceedings Article | 14 September 2018 Presentation + Paper

Presentation + Paper

Photorefractive effect in smectic c liquid crystal blends containing small amount of chiral dopant

Takeo Sasaki

Proceedings Volume 10735, 107350U (2018) https://doi.org/10.1117/12.2320218

KEYWORDS: Liquid crystals, Photorefraction, Molecules, Polarization, Refractive index, Temperature metrology, Ferroelectric LCDs, Chromophores, Dielectric polarization, Molecular interactions

Read Abstract +

Proceedings Article | 25 August 2017 Paper

Paper

Dynamic amplification of light signals in photorefractive ferroelectric liquid crystal blends containing photoconductive chiral dopant

T. Sasaki, M. Hafuri, T. Suda, M. Nakano, K. Funada, M. Ohta, T. Terazono, K. Le, Y. Naka

Proceedings Volume 10360, 1036007 (2017) https://doi.org/10.1117/12.2273488

KEYWORDS: Ferroelectric LCDs, Photorefraction, Holograms

Read Abstract +

Proceedings Article | 15 May 2017 Presentation + Paper

Presentation + Paper

Light amplification by photorefractive ferroelectric liquid crystal blends containing quarter-thiophene photoconductive chiral dopant

T. Sasaki, T. Hara, Y. Yamamoto, Y. Naka, K. Le

Proceedings Volume 10233, 102330H (2017) https://doi.org/10.1117/12.2264097

KEYWORDS: Liquid crystals, Ferroelectric LCDs, Photorefraction, Holographic materials, Liquids, Crystals, Holography, Holograms, Holography applications, Crystal optics, Absorption, Microscopes, Chromophores, Transparency, Refractive index

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Proceedings Article | 27 April 2016 Paper

Paper

Photorefractive effect in ferroelectric liquid crystal blends containing terthiophene photoconductive chiral dopants

Takeo Sasaki, Masanori Yoshino

Proceedings Volume 9895, 98950O (2016) https://doi.org/10.1117/12.2228581

KEYWORDS: Sensors, Photodetectors, Ferroelectric LCDs, Photorefraction, Liquid crystals, Crystal optics, Liquids, Crystals, Laser crystals, Liquid crystal lasers, Laser irradiation, Ions, Molecules, Electrodes, Microscopes, Adsorption, Refractive index

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Proceedings Article | 5 September 2015 Presentation + Paper

Presentation + Paper

Photorefractive amplification of moving light signals by photoconductive ferroelectric liquid crystal blends

Takeo Sasaki, Masanori Yoshino

Proceedings Volume 9564, 95640T (2015) https://doi.org/10.1117/12.2187824

KEYWORDS: Photorefraction, Ions, Ferroelectric LCDs, Molecules, Laser irradiation, Liquid crystals, Electrodes, Microscopes, Polarization, Refractive index

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Proceedings Article | 8 May 2015 Paper

Paper

Photorefractive amplification of dynamic light signals using photoconductive ferroelectric liquid crystals

Takeo Sasaki

Proceedings Volume 9508, 95080C (2015) https://doi.org/10.1117/12.2178730

KEYWORDS: Liquid crystals, Photorefraction, Molecules, Ferroelectric LCDs, Refractive index, Polarization, Spatial light modulators, Diffraction, Spiral phase plates, Temperature metrology

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Proceedings Article | 7 October 2014 Paper

Paper

Dynamic amplification of light signals in photorefractive ferroelectric liquid crystals

Takeo Sasaki, Yumiko Naka

Proceedings Volume 9181, 91810E (2014) https://doi.org/10.1117/12.2061457

KEYWORDS: Liquid crystals, Photorefraction, Molecules, Refractive index, Polarization, Ferroelectric LCDs, Spatial light modulators, Diffraction, Crystals, Temperature metrology

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Proceedings Article | 12 September 2013 Paper

Paper

Photorefractive effect in ferroelectric liquid crystals containing oligo-thiophene chiral compounds

Takeo Sasaki, Masashi Ikegami, Satoshi Kajikawa, Yumiko Naka

Proceedings Volume 8828, 882805 (2013) https://doi.org/10.1117/12.2022580

KEYWORDS: Liquid crystals, Photorefraction, Refractive index, Molecules, Diffraction, Ferroelectric LCDs, Electrons, Polarization, Polymers, Spatial light modulators

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Proceedings Article | 11 October 2012 Paper

Paper

Real-time formation of dynamic hologram in photorefractive ferroelectric liquid crystals

Takeo Sasaki, Masashi Ikegami, Satoshi Kajikawa, Yumiko Naka

Proceedings Volume 8474, 84740S (2012) https://doi.org/10.1117/12.930587

KEYWORDS: Liquid crystals, Photorefraction, Refractive index, Holograms, Diffraction, Molecules, Ferroelectric LCDs, Electrons, Polarization, Spatial light modulators

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Proceedings Article | 3 February 2009 Paper

Paper

Photorefractive effect of polymer-stabilized ferroelectric liquid crystals

Takeo Sasaki, Atsushi Katsuragi, Hirotada Hazato, Yukihito Nakazawa

Proceedings Volume 7232, 72320B (2009) https://doi.org/10.1117/12.807523

KEYWORDS: Photopolymerization, Polymers, Photorefraction, Electro optics, Refractive index, Diffraction, Molecules, Ferroelectric LCDs, Liquid crystals, Glasses

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Proceedings Article | 26 November 2007 Paper

Paper

Photorefractive effect of ferroelectric liquid crystals with an applied alternating electric field

Takeo Sasaki, Norihisa Moriya, Yukiko Iwasaki

Proceedings Volume 6829, 682902 (2007) https://doi.org/10.1117/12.755558

KEYWORDS: Molecules, Photorefraction, Switching, Diffraction gratings, Ferroelectric LCDs, Modulation, Refractive index, Liquid crystals, Electrons, Transmittance

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Proceedings Article | 12 April 2005 Paper

Paper

Photorefractive effect of ferroelectric liquid crystals

Takeo Sasaki, Oki Mochizuki, Kazunori Noborio, Tatsuya Abe, Yukihito Nakazawa

Proceedings Volume 5741, (2005) https://doi.org/10.1117/12.583133

KEYWORDS: Refractive index, Photorefraction, Molecules, Liquid crystals, Ferroelectric LCDs, Holograms, Switching, Diffraction gratings, Diffraction, Polarization

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Proceedings Article | 15 October 2004 Paper

Paper

Effect of the introduction of supramolecular structure on the photorefractive properties of liquid crystalline polymers

Takeo Sasaki, Godai Fukunaga

Proceedings Volume 5518, (2004) https://doi.org/10.1117/12.553220

KEYWORDS: Polymers, Diffraction, Liquid crystals, Liquids, Crystals, Chromophores, Photorefraction, Refractive index, Glasses, Diffraction gratings

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Proceedings Article | 8 December 2003 Paper

Paper

Spontaneous polarization reorientation photorefractive effect in low-molecular-weight ferroelectric liquid crystal mixtures

Takeo Sasaki, Atsushi Katsuragi, Oki Mochizuki, Yukihito Nakazawa

Proceedings Volume 5216, (2003) https://doi.org/10.1117/12.505441

KEYWORDS: Polarization, Refractive index, Photorefraction, Diffraction, Liquid crystals, Molecules, Ferroelectric LCDs, Electro optics, Crystals, Polymers

Read Abstract +

Proceedings Article | 5 November 2002 Paper

Paper

Spontaneous polarization reorientation photorefractive effect in ferroelectric liquid crystals

Takeo Sasaki, Atsushi Katsuragi, Yukihito Nakazawa, Godai Fukunaga, Shintaro Yoshimura

Proceedings Volume 4802, (2002) https://doi.org/10.1117/12.452423

KEYWORDS: Polarization, Diffraction, Photorefraction, Refractive index, Liquid crystals, Polymers, Ferroelectric LCDs, Temperature metrology, Molecules, Chromophores

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Proceedings Article | 5 October 1999 Paper

Paper

Photorefractive effect of the isotropic phase of polymer liquid crystals

Takeo Sasaki

Proceedings Volume 3799, (1999) https://doi.org/10.1117/12.363908

KEYWORDS: Liquid crystals, Polymers, Diffraction, Crystals, Liquids, Photorefraction, Refractive index, Molecules, Glasses, Photonic crystals

Read Abstract +

Showing 5 of 26 publications

Conference Committee Involvement (4)

Photosensitive Materials and their Applications III

8 April 2024 | Strasbourg, France

13th International Conference on Organic Nonlinear Optics

8 November 2022 |

Photosensitive Materials and their Applications II

5 April 2022 | Strasbourg, France

Photosensitive Materials and their Applications

6 April 2020 | Online Only, France

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