Photo-System Physics

SASAKI Keiji Laboratory, RIES, Hokudai

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Photo-System Physics Lab

Our goal is to unveil and understand the underlying physics of light-matter interactions and to develop new applications for optical observation and measurements, optical manipulation, and optical information processing. We investigate cutting-edge photonic systems and related scientific fields including nano-optics, quantum optics, and photo-molecular chemistry.

ACTIVITIES

 

NEWS

Ogawa was awarded the "Outstanding Presentation Award" at the 2024 Hokkaido Branch Conference of the Japan Sciety for Precision Engineering (August 17, 2024)

Ogawa received the "Outstanding Presentation Award" at the 2024 Hokkaido Branch Conference of the Japan Society for Precision Engineering.

Dr. Hsiang-Lin Liu visted our lab (August 1, 2024.)

Dr. Hsiang-Lin Liu (National Taiwan Normal University, Taiwan) visited our lab from August 1 to 6.

We will participate in the "2024 Hokkaido University Chemistry Department Two-Day Experience" (August 1, 2024)

We will participate in the "2024 Hokkaido University Chemistry Department Two-Day Experience" organized by the Hokkaido Branch of the Chemical Society of Japan, hosting high school students from within Hokkaido and giving them the opportunity to experience three-dimensional micro-printing technology using lasers.

Dr. Junze Zhou at Lawrence Berkeley National Laboratory stays with us (May 15, 2024)

Dr. Junze Zhou (Lawrence Berkeley National Laboratory, California, US) will visit and stay with us for research collaboration from May 15th to 31st, 2024.

Members update (April 1st, 2024)

Retirement

Keiji Sasaki

Move

Pin Christophe (Light-Matter Interaction for Quantum Technologies Unit, Okinawa Institute of Science and Technology)

An-Chieh Chen (Center for Mesoscopic Science, Institute for Molecular Science)

Graduation (March, 25th, 2024)

Ryota Shinohara (M.S.)

Takuya Ogawa (Undergrad)

Ryota Shinohara was awarded as Presentation Insentive Award (Jan 6, 2024)

Ryota Shinohara was awarded the Presentation Incentive Award at the Hokkaido Branch of the Optical Society of Japan Symposium.

Yuji Sunaba was awarded as Best Student Paper Prize (Apr 21, 2023)

Yuji Sunaba was awarded as Best Student Paper Prize at the Optical Manipulation and Structured Materials Conference (OMC2023).

Members update (April 1st, 2023)

New members

Takuya Ogawa (Undergrad)

Graduation (March, 23th, 2023)

Ryota Aisaka (M.S.)

Ryo Kakuta (M.S.)

Yamato Fukui (M.S.)

Sunaba and Takehara participated in the workshop "Structured Light for Life" at Adelaide University

Yuji Sunaba and Hikaru Takehara participated in the workshop "Structured Light for Life" held at Adelaide University from Feb 21 for two days.

Mr. Hao-Tse SU joined (Jan 10, 2023)

Mr. Hao-Tse SU from National Yang Ming Chiao Tung University (NYCU), Taiwan, will stay for two months to study optical manipulation.

Mr. Muhamad Safuan Mat Yeng joined (Dec 2, 2022)

Mr. Muhamad Safuan Mat Yeng from Sultan Idris Education University (UPSI), Malaysia, will stay for three months to study optical manipulation.

LinkIconPAST NEWS

SELECTED PAPERS

Optical Selection and Sorting of Nanoparticles according to Quantum Mechanical Properties

H. Fujiwara, K. Yamaguchi, T. Wada, H. Ishihara and K. Sasaki: Science Advances 7, eabe9551 (2021).

Nanoscale Color Sorting of Surface Plasmons in a Double-Nanogap Structure with Multipolar Plasmon Excitation

Y. Tanaka, M. Komatsu, H. Fujiwara, and K. Sasaki: Nano Letters 15, 7086–7090 (2015).

Nanostructured Potential of Optical Trapping Using a Plasmonic Nanoblock Pair

Y. Tanaka, S. Kaneda, and K. Sasaki: Nano Letters 13, 2146-2150 (2013).

Beating the standard quantum limit with four-entangled photons

T. Nagata, R. Okamoto, J. O'Brien, K. Sasaki, and S. Takeuchi: Science 316, 726–729 (2007).

Optical Trapping of a Metal-Particle and a Water Droplet by a Scanning Laser-Beam

K. Sasaki, M. Koshioka, H. Misawa, N. Kitamura, and H. Masuhara: Applied Physics Letters 60, 807–809 (1992).