テラヘルツ波×AI融合による人感を超える次世代センシング基盤の構築 / 国家戦略分野の若手研究者及び博士後期課程学生の育成事業（BOOST）
Outputs
研究業績
研究プロジェクト
非対称線形分散2Dヘテロによるゼロ消費電力THz検出器の創製 / 科学研究費助成事業
Compactandlowcostultra-widebandphotonics-based3Dimagingsystematmillimeter/terahertzband / 戦略的な研究開発の推進 戦略的創造研究推進事業 ACT-X
Investigation of a practical sparse array terahertz imaging sysytem for real-time 3-dimensional imaging applications / Grants-in-Aid for Scientific Research
論文・国際会議
Li Yi, S. Ito, C. Tang, Y. Nishida, K. Terumoto, T. Maeda, Y. Inose, M. Fujita, “Micrometer-scale displacement and thickness sensing using a single terahertz resonant-tunneling diode,” Journal of Applied Physics, 2026-07
Xinyan Chen, Xinyan_Chen, Qinchun Li, Ruiqin Ma, Jiaqi Bai, Li Yi, Jianfei Yang, “RF-MatID: Dataset and Benchmark for Radio Frequency Material Identification,” The Fourteenth International Conference on Learning Representations(ICLR) 2026, 2026-04
Shunsuke Shota,Li Yi, “Exterior Wall Inspection Using Millimeter-Wave Radar: A Bandwidth-Efficient Approach with Deconvolution,” Asia-Pacific Conference on Synthetic Aperture Radar（APSAR2025）, 2025-10
Shota Ito, Koji Terumoto, Masayuki Fujita, Li Yi, “Compact THz Sensing System Utilizing a Resonant Tunneling Diode Transceiver,” 2025 50th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz), 2025-08
Jiarong Zhang, Li Yi, Yihan Li, “A Theoretical Model for Recirculating Frequency-Shifted Fiber Loop Supporting Ultra-Large Number of Circulations,” Journal of Lightwave Technology, vol. 43, no. 15, pp. 7163-7171, 2025-08-01, doi: 10.1109/jlt.2025.3574502
Li Yi, Yuta Inose, Nguyen H. Ngo, Suyun Wang, Yosuke Nishida, Masayuki Fujita, “Resonant Tunneling Diode Transceiver For Integrated Terahertz Band 3D Image Sensor,” 2024 49th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz), pp. 1-2, 2024-09-01, doi: 10.1109/irmmw-thz60956.2024.10697584
小藪 庸介, 柴田 紀彦, 要 遼平, 水野 遼子, 易 利, 冨士田 誠之, 永妻 忠夫, “シリコンY分岐導波路を用いた300 GHz帯三次元イメージング,” 電子情報通信学会論文誌 C, vol. J107-C, no. 10, pp. 306-313, 2024-06, doi: 10.14923/transelej.2023JCI0020
Changyu Zhou, Xu Bai, Li Yi, Munawar Shah, Motoyuki Sato, Xiaohua Tong, “Fast Array Ground Penetrating Radar Localization by CNN-based Optimization Method,” IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, vol. 17, pp. 1-11, 2024, doi: 10.1109/jstars.2024.3357831
Li Yi, Yihan Li, Tadao Nagatsuma, “Photonic Radar for 3D Imaging: From Millimeter to Terahertz Waves,” IEEE Journal of Selected Topics in Quantum Electronics, vol. 29, no. 5, 2023-09, doi: 10.1109/JSTQE.2023.3298933
Yosuke Koyabu, Haruka Tokunaga, Yaheng Wang, Li Yi, Takahiro Ohtsuka, Yasuyuki Tagami, Tadao Nagatsuma, “Ultrawide-band Millimeter-wave Photonic Radar Mounted on Drone,” Asia-Pacific Microwave Conference Proceedings, APMC, pp. 500-502, 2023, doi: 10.1109/APMC57107.2023.10439926
Yaheng Wang, Li Yi, Masayoshi Tonouchi, Tadao Nagatsuma, “High-Speed 600 GHz-Band Terahertz Imaging Scanner System with Enhanced Focal Depth,” Photonics, vol. 9, no. 12, pp. 913-913, 2022-11-28, doi: 10.3390/photonics9120913
Ryoko Mizuno, Ryohei Kaname, Yosuke Nishida, Li Yi, Masayuki Fujita, Tadao Nagatsuma, “THz Imaging System with a Single Resonant Tunneling Diode Transceiver in 300-GHz Band,” 2022 47th International Conference on Infrared, Millimeter and Terahertz Waves (IRMMW-THz), vol. 2022-August, 2022-08-28, doi: 10.1109/irmmw-thz50927.2022.9895954
Ratmalgre Koala, Ryoma Maru, Kei Iyoda, Li Yi, Masayuki Fujita, Tadao Nagatsuma, “Ultra-Low-Loss and Broadband All-Silicon Dielectric Waveguides for WR-1 Band (0.75–1.1 THz) Modules,” Photonics, vol. 9, no. 8, pp. 515-515, 2022-07-24, doi: 10.3390/photonics9080515
Norihiko Shibata, Yuta Uemura, Yuma Kawamoto, Li Yi, Masayuki Fujita, Tadao Nagatsuma, “Silicon Dielectric Diplexer Module for 600-GHz-Band Frequency-Division Multiplexing Wireless Communication,” IEEE Transactions on Terahertz Science and Technology, vol. 12, no. 4, pp. 334-344, 2022-07-01, doi: 10.1109/TTHZ.2022.3167946
Yujie Lyu, Yihan Li, Chunlong Yu, Li Yi, Tadao Nagatsuma, Zheng Zheng, “Photonic Generation of Highly-Linear Ultra-Wideband Stepped-Frequency Microwave Signals With Up to 6·106 Time-Bandwidth Product,” Journal of Lightwave Technology, vol. 40, no. 4, pp. 1036-1042, 2022-02-15, doi: 10.1109/JLT.2021.3127949
Yujie Lyu, Yihan Li, Chunlong Yu, Li Yi, Zheng Zheng, “Generation of broadband highly-linear frequency-modulated signals for optical sensing,” 2022 Conference on Lasers and Electro-Optics, CLEO 2022 - Proceedings, 2022
Yushi Tamenori, Haruka Tokunaga, Li Yi, Tadao Nagatsuma, “Water Content Estimation in Thermal Insulation Layer Using Millimeter-Wave Optical Coherence Tomography,” IEICE Transactions on Electronics, vol. E105.C, no. 1, pp. 1-8, 2022-01, doi: 10.1587/transele.2021ECP5007
Li Yi, Ryohei Kaname, Ryoko Mizuno, Yihan Li, Masayuki Fujita, Hiroshi Ito, Tadao Nagatsuma, “Ultra-Wideband Frequency Modulated Continuous Wave Photonic Radar System for Three-Dimensional Terahertz Synthetic Aperture Radar Imaging,” Journal of Lightwave Technology, vol. 40, no. 20, pp. 6719-6728, 2022, doi: 10.1109/JLT.2022.3193397
Li Yi, Yosuke Nishida, Tomoki Sagisaka, Ryohei Kaname, Ryoko Mizuno, Masayuki Fujita, Tadao Nagatsuma, “Towards Practical Terahertz Imaging System With Compact Continuous Wave Transceiver,” JOURNAL OF LIGHTWAVE TECHNOLOGY, vol. 39, no. 24, pp. 7850-7861, 2021-12, doi: 10.1109/JLT.2021.3092779
Tadao Nagatsuma, Masayuki Fujita, Li Yi, “Millimeter-wave and Terahertz Photonics for Communications and Sensors,” 2021 Optical Fiber Communications Conference and Exhibition, OFC 2021 - Proceedings, 2021-06
Kazutaka Kikuta, Li Yi, Lilong Zou, Motoyuki Sato, “Subsurface velocity change estimation of pavement with multistatic GPR system,” IEICE Transactions on Electronics, vol. 104, no. 4, pp. 144-147, 2021-04, doi: 10.1587/transele.2020RES0001
Ryohei Kaname, Li Yi, Tadao Nagatsuma, “Fast Three-dimensional Terahertz Imaging with Continuous-wave Photomixing,” International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz, vol. 2021-August, 2021, doi: 10.1109/IRMMW-THz50926.2021.9567535
Haruka Tokunaga, Yushi Tamenori, Li Yi, Tadao Nagatsuma, “Drone-mounted Optical Fiber-fed Millimeter-wave Radar,” International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz, vol. 2021-August, 2021, doi: 10.1109/IRMMW-THz50926.2021.9567059
Tadao Nagatsuma, Masayuki Fujita, Li Yi, “Millimeter-wave and Terahertz Photonics for Communications and Sensors,” 2021 OPTICAL FIBER COMMUNICATIONS CONFERENCE AND EXPOSITION (OFC), 2021
Tadao Nagatsuma, Masayuki Fujita, Li Yi, “Enabling Device Technologies for Photonics-assisted Millimeter and Terahertz Wave Applications,” 2021 IEEE INTERNATIONAL ELECTRON DEVICES MEETING (IEDM), vol. 2021-December, pp. 11.5.1-11.5.4, 2021, doi: 10.1109/IEDM19574.2021.9720521
Norihiko Shibata, Yuta Uemura, Yuma Kawamoto, Li Yi, Masayuki Fujita, Tadao Nagatsuma, “600-GHz-Band Frequency-Division Multiplexing Communication with Silicon Unclad Diplexer,” 2021 IEEE ASIA-PACIFIC MICROWAVE CONFERENCE (APMC), pp. 139-141, 2021, doi: 10.1109/APMC52720.2021.9661937
Norihiko Shibata, Yuta Uemura, Yuma Kawamoto, Li Yi, Masayuki Fujita, Tadao Nagatsuma, “600-GHz-band Silicon Dielectric Waveguide Module,” 2021 46TH INTERNATIONAL CONFERENCE ON INFRARED, MILLIMETER AND TERAHERTZ WAVES (IRMMW-THZ), 2021, doi: 10.1109/IRMMW-THz50926.2021.9567463
Tomoki Sagisaka, Ryohei Kaname, Masato Kikuchi, Naoya Kukutsu, Daniel Headland, Li Yi, Masayuki Fujita, Tadao Nagatsuma, “Integrated Terahertz Optics with Effective Medium for 600-GHz-band Imaging,” 2020 International Topical Meeting on Microwave Photonics, MWP 2020 - Proceedings, pp. 62-65, 2020-11-24
Ryohei Kaname, Tomoki Sagisaka, Li Yi, Tadao Nagatsuma, “600-GHz-Band Terahertz Imaging System Using Frequency-Independent Concave Mirror,” 2020 International Topical Meeting on Microwave Photonics, MWP 2020 - Proceedings, pp. 58-61, 2020-11-24
Li Yi, Ryohei Kaname, Yosuke Nishida, Xiongbin Yu, Masayuki Fujita, Tadao Nagatsuma, “Imaging Applications with a Single Resonant Tunneling Diode Transceiver in 300-GHz Band,” 2020 International Topical Meeting on Microwave Photonics, MWP 2020 - Proceedings, pp. 120-123, 2020-11-24
Kyosuke Okamoto, Li Yi, Hiroshi Asanuma, Takashi Okabe, Yasuyuki Abe, Masatoshi Tsuzuki, “Activation and inactivation of seismicity: The terminations of two injection tests in Okuaizu Geothermal Field, Japan,” Seismological Research Letters, vol. 91, no. 5, pp. 2730-2743, 2020-09, doi: 10.1785/0220200084
Tadao Nagatsuma, Fumiya Ayano, Keita Toichi, Li Yi, Masamichi Fujiwara, Noriko Iiyama, Junichi Kani, Hiroshi Ito, “Wireless communication using fermi-level-managed barrier diode receiver with J-band waveguide-input port,” IEEE MTT-S International Microwave Symposium Digest, vol. 2020-, pp. 631-634, 2020-08-01, doi: 10.1109/IMS30576.2020.9224006
Lilong Zou, Li Yi, Motoyuki Sato, “On the Use of Lateral Wave for the Interlayer Debonding Detecting in an Asphalt Airport Pavement Using a Multistatic GPR System,” IEEE Transactions on Geoscience and Remote Sensing, vol. 58, no. 6, pp. 4215-4224, 2020-06, doi: 10.1109/TGRS.2019.2961772
Yi, L., Iwamoto, K., Yamamoto, T., Ayano, F., Rolland, A., Kuse, N., Fermann, M., Li, Y., Nagatsuma, T., “300-GHz-band wireless communication using a low phase noise photonic source,” International Journal of Microwave and Wireless Technologies, vol. 12, no. 7, pp. 551-558, 2020, doi: 10.1017/S175907872000029X
YI Li, 園田理人, 木村亮, 東本大樹, 永妻忠夫, “Photonic-based Wireless Communication Link at 600-GHz Band,” 電子情報通信学会論文誌 C(Web), vol. J103-C, no. 6, pp. 298-304, 2020
Jing Wei Zhang, Sheng Bo Ye, Hai Liu, Li Yi, Guang You Fang, “Filtering out Antenna Effects From GPR Data by an RBF Neural Network,” IEEE Geoscience and Remote Sensing Letters, vol. 16, no. 9, pp. 1378-1382, 2019-09, doi: 10.1109/lgrs.2019.2899896
Kazutaka Kikuta, Li Yi, Lilong Zou, Motoyuki Sato, “Robust subsurface velocity change detection method with Yakumo multistatic GPR system,” International Geoscience and Remote Sensing Symposium (IGARSS), vol. 2019-, pp. 3582-3585, 2019, doi: 10.1109/IGARSS.2019.8900570
Jingwei Zhang, Shengbo Ye, Li Yi, Yuquan Lin, Hai Liu, Guangyou Fang, “A Hybrid Method Applied to Improve the Efficiency of Full-Waveform Inversion for Pavement Characterization,” Sensors, vol. 18, no. 9, 2018-09, doi: 10.3390/s18092916
Li Yi, Lilong Zou, Motoyuki Sato, “A simplified velocity estimation method for monitoring the damaged pavement by a multistatic GPR system YAKUMO,” 2018 17th International Conference on Ground Penetrating Radar, GPR 2018, 2018-08-20, doi: 10.1109/ICGPR.2018.8441531
Li Yi, “Practical Approach for High-Resolution Airport Pavement Inspection with the Yakumo Multistatic Array Ground-Penetrating Radar System,” Sensors, vol. 18, no. 8, 2018-08, doi: 10.3390/s18082684
Kyosuke Okamoto, Li Yi, Hiroshi Asanuma, Takashi Okabe, Yasuyuki Abe, Masatoshi Tsuzuki, “High-resolution microseismic monitoring for water injection in Okuaizu Geothermal Field, Japan,” 22nd International Symposium on Recent Advances in Exploration Geophysics, RAEG 2018, 2018-05-24, doi: 10.3997/2352-8265.20140229
Feng, W., Yi, L., Sato, M., “Near range radar imaging based on block sparsity and cross-correlation fusion algorithm,” IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, vol. 11, no. 6, pp. 2079-2089, 2018, doi: 10.1109/JSTARS.2018.2797056
Yi, L., Zou, L., Takahashi, K., Sato, M., “High-Resolution Velocity Analysis Method Using the ℓ-1 Norm Regularized Least-Squares Method for Pavement Inspection,” IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, vol. 11, no. 3, pp. 1005-1015, 2018, doi: 10.1109/JSTARS.2018.2791970
Okamoto, K., Yi, L., Asanuma, H., Okabe, T., Abe, Y., Tsuzuki, M., “Triggering processes of microseismic events associated with water injection in Okuaizu Geothermal Field, Japan,” Earth, Planets and Space, vol. 70, no. 1, 2018, doi: 10.1186/s40623-018-0787-7
Weike Feng, Li Yi, Motoyuki Sato, “Near range radar imaging by SFCW linear sparse array based on block sparsity,” International Geoscience and Remote Sensing Symposium (IGARSS), vol. 2017-, pp. 5362-5365, 2017-12-01, doi: 10.1109/IGARSS.2017.8128215
Li Yi, Kazunori Takahashi, Motoyuki Sato, “Enhancement of the migrated results with the deblurring filter,” European Geosciences Union General Assembly 2016 (EGU2016), 2016-04-20
Sato, M., Yi, L., Iitsuka, Y., Zou, L., Takahashi, K., IEEE, “Optimization of Antenna Polarization of the Multistatic GPR System "Yakumo",” Proceedings of 2016 16th International Conference on Ground Penetrating Radar (Gpr), 2016, doi: 10.1109/ICGPR.2016.7572664
Yi, Li, Takahashi, Kazunori, Sato, Motoyuki, IEEE, “Application of L1 norm approach to data acquired by the array GPR "Yakumo",” 2016 10th European Conference on Antennas and Propagation (Eucap), 2016, doi: 10.1109/EuCAP.2016.7481984
Yi, Li, Takahashi, Kazunori, Sato, Motoyuki, “A Fast Iterative Interpolation Method in f-k Domain for 3-D Irregularly Sampled GPR Data,” Ieee Journal of Selected Topics in Applied Earth Observations and Remote Sensing, vol. 9, no. 1, pp. 9-17, 2016, doi: 10.1109/JSTARS.2015.2489260
Yi, Li, Takahashi, Kazunori, Sato, Motoyuki, IEEE, “ESTIMATION OF VERTICAL VELOCITY PROFILE BY MULTISTATIC GPR YAKUMO,” 2015 Ieee International Geoscience and Remote Sensing Symposium (Igarss), pp. 1060-1063, 2015, doi: 10.1109/IGARSS.2015.7325952
Li Yi, Motoyuki Sato, Kazunori Takahashi, “Optimization of data sampling and imaging reconstruction by GPR,” GPR2014, pp. 634-637, 2014-07-01
Sato, Motoyuki, Takahashi, Kazunori, Yi, Li, “Optimization of Data Sampling and Image Reconstruction by GPR,” Proceedings of the 2014 15th International Conference on Ground Penetrating Radar (Gpr 2014), pp. 615-618, 2014, doi: 10.1109/ICGPR.2014.6970498
Yi, L, Takahashi, K, Sato, M, “Archaeological Survey of Dangoyama Kofun by 3DGPR,” Proceedings of the 11th SEGJ International Symposium, 2013-11-18
招待講演
易 利, “テラヘルツ(THz)デバイスから物理融合AIへ：THzセンシングの実用化に向けて,” テラヘルツ波科学技術産学連携委員会 第66回委員総会・第63回研究会(センシング分科会), 2026-05-13
Li Yi, Shota Ito, Ryuma Nakamura, Yosuke Nishida, Koji Terumoto, Toshihisa Maeda, “Resonant Tunneling Diodes (RTDs) for Accelerating Terahertz Sensing Applications,” 2026 URSI-JRSM, 2026-03-03
易利, “テラヘルツセンシングの実用化を加速する共鳴トンネルダイオード （RTD),” 第30回パターン計測シンポジウム, 2025-11-21
Li Yi, “Resonant tunneling diode transceiver for integrated terahertz band 3D image sensor,” 49th International Conference on Infrared, Millimeter and Terahertz Waves (IRMMW-THz), 2024-09-11
易利, “安心・安全な社会に向けた電波センシング技術動向,” 第12回光・電波フォーラム, 2021-11-19
LI Yi, “Prospects for Long-range Terahertz Imaging Techniques,” IEICE General Conference, 2020-03-20