RESEARCH

Overview

I pursue a system that converts material information from living organisms and the environment—information that is invisible to the eye, inaudible to the ear, and difficult to perceive—into “light,” enabling real-time interaction through optical communication networks and computers. To realize the light–matter conversion technologies at the core of this system, we apply advanced techniques for controlling light to develop microsensors that respond to minute amounts of bio-signals and microactuators that modulate optical signals. By orchestrating these microdevices in concert with artificial intelligence, I aim to control biological information in real time and thereby create systems that guide dynamic harmony in life and the environment—what I call “nature with light”, a living and environmental world that harmonizes through light.

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Projects

1. Nanophotonic Bio/Chemical Sensors

Coming soon.

2. Imaging Biosensors

Coming soon.

3. Bio-active Photonic Interfaces

Coming soon.

Achievements

Publication

High-Q Metasurface Absorber Enabled by Symmetry Breaking in a Plasmonic Lattice

Authors: Daiki Kawasaki, Takuo Tanaka

Journal: Nano Letters, xxxx, xxx, xxxx-xxxx, 2026

Label-free detection of DNA Amplification using Plasmonic Crystal

Authors: Futa Furukawa, Hirotaka Yamada, Daiki Kawasaki, Ryosuke Nishitsuji, Kenji Sueyoshi, Hideaki Hisamoto, Tatsuro Endo,

Journal: IEEJ Transactions on Sensors and Micromachines, 145, 9, 213-214, 2025

Investigation of multivariate analysis of surface-enhanced Raman scattering spectra using simple machine-learning models: Prediction of the composition of mixed self-assembled monolayer on gold surface

Authors: Ryosuke Nishitsuji, Daiki Kawasaki, Tatsuro Endo

Journal: Soft computing, Accepted

Enzyme-containing-hydrogel/TiO2 Hybrid Photonic Crystal for Label-free Detection of Small Molecules

Authors: Daiki Kawasaki, Tatsuro Endo

Journal: Scientific reports, 15, 14344, 2025

Dealing with plasmonic crystal biosensors: Sensitivity assessment of nanodisks/nanoholes arrayed plasmonic system for label-free DNA detection

Authors: Daiki Kawasaki, Ryosuke Nishitsuji, Tatsuro Endo

Journal: Biosensors and Bioelectronics, 15, 116659, 2024

Nanoimprinted Plasmonic Crystals for Cost-Effective SERS Identification of Methylated DNAs.

Authors: Daiki Kawasaki, Ryosuke Nishitsuji, Tatsuro Endo

Journal: Sensors(Basel, Switzerland) 24(14), 2024

Trapping of nanosized biomolecules on plasmonic nanohole arrays for biosensor applications: simple fabrication and visible-region detection

Authors: Satoko Fujiwara, Misaki Hata, Ikumi Onohara, Daiki Kawasaki, Kenji Sueyoshi, Hideaki Hisamoto, Masato Suzuki, Tomoyuki Yasukawa, Tatsuro Endo

Journal: RSC Advances 13(31) 21118-21126, 2023

Gold Nanocone Array with Extensive Electromagnetic Fields for Highly Reproducible Surface-Enhanced Raman Scattering Measurements

Authors: Satoko Fujiwara, Daiki Kawasaki, Kenji Sueyoshi, Hideaki Hisamoto, Tatsuro Endo

Journal: Micromachines 13(8), 2022

Quantum dots / TiO₂ hybrid photonic crystal: Fabrication and application for highly sensitive and visible region-responsive biosensor

Authors: Shotaro Ueda, Daiki Kawasaki, Ryosuke Nishitsuji, Hirotaka Yamada, Kenji Sueyoshi, Hideaki Hisamoto, Tatsuro Endo

Journal: Microelectronic Engineering 263, 2022

Au nanorods-TiO₂ photonic crystal plasmonic-photonic hybrid sensor for label-free detection and identification of DNA molecules with single nucleotide polymorphisms

Authors: Daiki Kawasaki, Hirotaka Yamada, Kenji Sueyoshi, Hideaki Hisamoto, Tatsuro Endo

Journal: Sensors and Actuators B: Chemical 361, 2022

Wavelength-tunable dual-band edge plasmon mode based on gold edge-hole plasmonic nanostructure

Authors: Hirotaka Yamada, Daiki Kawasaki, Kenji Sueyoshi, Hideaki Hisamoto, Tatsuro Endo

Journal: Results in Physics 37 , 2022

Imprinted Photonic Crystal-Film-Based Smartphone-Compatible Label-Free Optical Sensor for SARS-CoV-2 Testing

Authors: Daiki Kawasaki, Hirotaka Yamada, Kenji Sueyoshi, Hideaki Hisamoto, Tatsuro Endo

Journal: Biosensors 12(4), 2022

Fabrication of Metal-Insulator-Metal Nanostructures Composed of Au-MgF₂-Au and Its Potential in Responding to Two Different Factors in Sample Solutions Using Individual Plasmon Modes

Authors: Hirotaka Yamada, Daiki Kawasaki, Kenji Sueyoshi, Hideaki Hisamoto, Tatsuro Endo

Journal: Micromachines 13(2), 2022

Fabrication and Characterization of YAG:Ce³⁺ Phosphor Powder-Contained Photonic Crystal for Optical Sensor

Authors: Shotaro Ueda, Nao Kobayashi, Daiki Kawasaki, Hirotaka Yamada, Kenji Sueyoshi, Hideaki Hisamoto, Tatsuro Endo

Journal: IEEJ Transactions on Sensors and Micromachines 142(2) 29-30, 2022

Highly sensitive optical ion sensor with ionic liquid-based colorimetric membrane/photonic crystal hybrid structure

Authors: Daiki Kawasaki, Ryoutarou Oishi, Nao Kobayashi, Tatsumi Mizuta, Kenji Sueyoshi, Hideaki Hisamoto, Tatsuro Endo

Journal: Scientific Reports 10(1), 2020

TiN-contained polymer-metal core-shell structured nanocone array: Engineering of sensor performance by controlling plasmonic properties

Authors: Daiki Kawasaki, Kenichi Maeno, Hirotaka Yamada, Kenji Sueyoshi, Hideaki Hisamoto, Tatsuro Endo

Journal: Sensors and Actuators, B: Chemical 299, 2019

Core-Shell-Structured Gold Nanocone Array for Label-Free DNA Sensing

Authors: Daiki Kawasaki, Hirotaka Yamada, Kenichi Maeno, Kenji Sueyoshi, Hideaki Hisamoto, Tatsuro Endo

Journal: ACS Applied Nano Materials 2(8) 4983-4990, 2019

Au"edged hole array" for sensor application

Authors: Hirotaka Yamada, Daiki Kawasaki, Chigusa Inoue, Kenichi Maeno, Kenji Sueyoshi, Hideaki Hisamoto, Tatsuro Endo

Journal: Journal of Photopolymer Science and Technology 32(1) 101-105, 2019

International Conferences

Ultrasensitive label-free miRNA sensing realized by a Q-tunable plasmonic metasurface

Authors:, Daiki Kawasaki, Takuo Tanaka

16th META Session3–O54, 14-17, July 2026, Dublin, Ireland

Highly Sensitive Label-Free MicroRNA Sensor based on Plasmonic Metasurface Absorber

Authors:, Daiki Kawasaki, Takuo Tanaka

9th International Conference on Bio-Sensing Technology No.56 May. 2026, Kuala Lumpur, Malaysia

Engineering of near-field enhancement on symmetry-broken plasmonic metasurfaces

Authors:, Daiki Kawasaki, Takuo Tanaka

OPIC 2026 META, META6-03, 2026.4, Yokohama, Kanagawa

Plasmonic refractive index sensor based on lattice resonance coupled quasi-BIC mode

Authors:, Daiki Kawasaki, Takuo Tanaka

SPIE Photonics West 2026 Plasmonics in Biology and Medicine XXIII No. 13869-11 2026.1

Quantum Dots / TiO2 Hybrid Photonic Crystal: Fabrication and Characterization for Optical Biosensor Application in Visible Region

Authors:, Shotaro Ueda, Daiki Kawasaki, Kenji Sueyoshi, Hideaki Hisamoto, Tatsuro Endo

RSC Tokyo International Conference 2021 (Online) December 6-7, 2021

Photonic Crystal Improves the Absorptiometric Sensitivity of Colorimetric Membrane By Cavity-Induced Light-Matter Interaction

Authors:,Daiki Kawasaki, Ryoutarou Oishi, Nao Kobayashi, Tatsumi Mizuta, Kenji Sueyoshi, Hideaki Hisamoto, Tatsuro Endo

18th International Meeting on Chemical Sensors (Montreal, Canada) May 10-14, 2020

Au "Edged Hole Array" for Sensor Application

Authors: Hirotaka Yamada, Daiki Kawasaki, Chigusa Inoue, Kenichi Maeno, Kenji Sueyoshi, Hideaki Hisamoto, Tatsuro Endo

The 37th International Conference of Photopolymer Science and Technology (Chiba Japan) May 18-21, 2020

Fabrication and Evaluation of TiN-Ag Nano Cone Array toward Localized Surface Plasmon Resonance-Based Optical Sensor Applications

Authors: Daiki Kawasaki, Hirotaka Yamada, Kenichi Maeno, Kenji Sueyoshi, Hideaki Hisamoto, Tatsuro Endo

31st International Microprocess and Nanotechnology Conference (Sapporo, Japam) November 13-16, 2018

Chain-shaped plasmonic crystal for highly sensitive label-free biosensor

Authors: Hirotaka Yamada, Daiki Kawasaki, Shoma Aki, Kenichi Maeno, Kenji Sueyoshi, Hideaki Hisamoto, Tatsuro Endo

17th International meeting on chemical sensors (Vienna, Austria) July 15-19, 2018