外部資金：

2022-2025年度　戦略的創造研究推進事業(ACT-X)　 「Compact and low cost ultra-wide band photonics-based 3D imaging system at millimeter/terahertz 」（研究課題番号JPMJAX22K2）（研究代表者）

2021-2027年度　戦略的創造研究推進事業(CREST)　「時空間分布制御テラヘルツ集積デバイスシステムの創成」研究課題番号JPMJCR21C4 （主たる研究者）

2021-2025年度　共同研究　「Study on THz imaging techniques with a single resonant tunneling diode receiver at 300-GHz band」（研究代表者）

2022-2024年度　NICT革新的情報通信技術研究開発委託研究　「超低雑音信号発生技術に基づく300GHz帯多値無線通信に関する研究開発」（分担）

2022-2024年度　共同研究　「テラヘルツ波による検査技術」（分担）

2020-2022年度　共同研究　「ドローン搭載のミリ波レーダモジュールの開発」（分担）

2019-2021年度　科学研究費　若手研究「Investigation of a practical sparse array terahertz imaging system for real-time 3-dimensional imaging application」研究課題番号19L14995）（研究代表者）

雑誌論文（２０１６－２０２４）

[1]Y. Koyabu, N. Shibata, R. Kaname, R. Mizuno, L. Yi, M. Fujita, and T. Nagatsuma, “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," IEICE Transactions on Electronics, vol. J107-C, no. 10, pp. -, Oct. 2024.
[2]C. Zhou, X. Bai, L. Yi, M. Shah, M. Sato and X. 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. 4663-4673, Apr. 2024.
[3]L. Yi, Y. Li, and T. Nagatsuma, “Photonic radar for 3D imaging: from millimeter to terahertz waves,” IEEE Journal of Selected Topics in Quantum Electronics, vol. 29, no. 5: Terahertz Photonics, p. 8500714, Sep. 2023.
[4]Y. Wang, L. Yi, M. Tonouchi, and T. Nagatsuma, “High-Speed 600 GHz-Band Terahertz Imaging Scanner System with Enhanced Focal Depth,” Photonics, vol. 9, p. 913, Nov. 2022.
[5]L. Yi, R. Kaname, R. Mizuno, Y. Li, H. Ito, M. Fujita, and T. 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, Oct. 2022.
[6]R. Koala, R. Maru, K. Iyoda, L. Yi, M. Fujita, and T. Nagatsuma, “Ultra-Low-Loss and Broadband All-Silicon Dielectric Waveguides for WR-1 Band (0.75–1.1 THz) Modules,” Photonics, vol. 9, p. 515, Jul. 2022.
[7]N. Shibata, Y. Uemura, Y. Kawamoto, L. Yi, M. Fujita, and T. 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, Jul. 2022.
[8]Y. Lv, Y. Li, C. Yu, L. Yi, T. Nagatsuma, and Z. Zheng, “Photonic Generation of Highly-Linear Ultra-Wideband Stepped-Frequency Microwave Signals with Up to 6106 Time-Bandwidth Product,” Journal of Lightwave Technology, vol. 40, no. 4, pp. 1036-1042, Feb. 2022.
[9]Y. Tamenori, H. Tokunaga, L. Yi, and T. 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, Jan. 2022.
[10]L. Yi, Y. Nishida, R. Kaname, R. Mizuno, M. Fujita, and T. Nagatsuma, “Towards Practical Terahertz Imaging System With Compact Continuous Wave Transceiver,” Journal of Lightwave Technology, vol. 39, no. 24, pp. 7850-7861, Dec. 2021.
[11]K. Kikuta, L. Yi, L. Zou, and M. Sato, “Subsurface Velocity Change Estimation of Pavement with Multistatic GPR System,” IEICE Transactions on Electronics, vol. E104.C, no. 4, pp. 144-147, Apr. 2021.
[12]L. Yi, K. Iwamoto, T. Yamamoto, F. Ayano, A. Rolland, N. Kuse, M. Fermann, Y. Li and T. Nagatsuma, “300-GHz-band wireless communication using a low phase noise photonic source,” Int. J. Microw. Wirel. Technol., vol. 12, no. 7, pp. 551-558, Sep. 2020.
[13]K. Okamoto, L. Yi, H. Asanuma, T. Okabe, Y. Abe, and M. 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, Jul. 2020.
[14]L. Zou, L. Yi and M. 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, Jun. 2020.
[15]L. Yi, M. Sonoda, R. Kimura, D. Higashimoto, and T. Nagatsuma, “フォトニクス技術を利用した600GHZ帯無線技術,” IEICE Transactions on Electronics, vol. J103-C, no. 6, pp. 298-304, May 2020.
[16]J. Zhang, S. Ye, H. Liu, L. Yi and G. 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, Sep. 2019.
[17]J. Zhang, S. Ye, L. Yi, Y. Lin, H. Liu, and G. Fang, “A Hybrid Method Applied to Improve the Efficiency of Full-Waveform Inversion for Pavement Characterization,” Sensors, vol. 18, no. 9, pp. 2916, Sep. 2018.
[18]L. Yi, K. Takahashi and M. Sato, “Practical approach for high-resolution airport pavement inspection with the Yakumo multistatic array ground-penetrating radar system,” Sensors, vol. 18, pp. 2684-2698, Aug. 2018.
[19]W. Feng, L. Yi and M. Sato, "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, Jun. 2018.
[20]L. Yi, K. Takahashi and M. Sato, “High-resolution velocity analysis method using ℓ-1 norm regularized least square method for pavement inspection,” IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, vol. 11, no. 3, pp. 1005-1015, Mar. 2018.
[21]K. Okamoto, L. Yi, H. Asanuma, T. Okabe, Y. Abe, and M. Tsuzuki, “Triggering processes of microseismic events associated with water injection in Okuaizu Geothermal Field, Japan,” Earth, Planets and Space, vol. 70, no. 1, pp. 102-108, Feb. 2018.
[22]L. Yi, K. Takahashi and M. Sato, "Large-scale subsurface velocity estimation with Yakumo GPR array system," URSI Radio Science Bulletin, vol. 2016, no. 356, pp. 24-31, Mar. 2016.
[23]L. Yi, K. Takahashi and M. Sato, “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, Jan. 2016.

国際学会（２０１６－２０２４）

[1]L. Yi, Y. Inuse, N. Ngo, S. Wang, Y. Nishida, M. Fujita "Resonant Tunneling Diode Transceiver For Integrated Terahertz Band 3D Image Sensor," in 2024 49th International Conference on Infrared, Millimeter and Terahertz Waves (IRMMW-THz), Perth, Australia, 2024.
[2]Y. Koyabu, H. Tokunaga, Y. Wang, L. Yi, T. Ohtsuka, Y. Tagami, T. Nagatsuma, "Ultrawide-band Millimeter-wave Photonic Radar Mounted on Drone," 2023 Asia-Pacific Microwave Conference (APMC), Taipei, Taiwan, 2023, pp. 500-502.
[3]R. Mizuno, R. Kaname, Y. Nishida, L. Yi, M. Fujita and T. 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), Delft, Netherlands, 2022, pp. 1-2.
[4]Y. Lyu, Y. Li, C. Yu, L. Yi and Z. Zheng, "Generation of broadband highly-linear frequency-modulated signals for optical sensing," 2022 Conference on Lasers and Electro-Optics (CLEO), San Jose, CA, USA, 2022, pp. 1-2.
[5]T. Nagatsuma, M. Fujita and L. Yi, "Enabling Device Technologies for Photonics-assisted Millimeter and Terahertz Wave Applications," 2021 IEEE International Electron Devices Meeting (IEDM), San Francisco, CA, USA, 2021, pp. 11.5.1-11.5.4.
[6]Y. Wang, R. Kaname, L. Yi and T. Nagatsuma, "High-speed 600-GHz-Band Terahertz Imaging System Using Polygon Mirror," 2021 International Topical Meeting on Microwave Photonics (MWP), Pisa, Italy, 2021, pp. 1-4.
[7]R. Kaname, L. Yi and T. Nagatsuma, "Fast Three-dimensional Terahertz Imaging with Continuous-wave Photomixing," 2021 46th International Conference on Infrared, Millimeter and Terahertz Waves (IRMMW-THz), Chengdu, China, Aug. 29 – Sep. 3, 2021, pp. 1-2.
[8]H. Tokunaga, Y. Tamenori, L. Yi and T. Nagatsuma, "Drone-mounted Optical Fiber-fed Millimeter-wave Radar," 2021 46th International Conference on Infrared, Millimeter and Terahertz Waves (IRMMW-THz), Chengdu, China, Aug. 29 – Sep. 3, 2021, pp. 1-2.
[9]R. Kaname, L. Yi and T. Nagatsuma, "Investigation on 600-GHz-Band FMCW Photonic Radar System for a Flexible Inspection Distance," 2021 IEEE Asia-Pacific Microwave Conference (APMC), Brisbane, Australia, Nov. 28 - Dec 01, 2021, pp. 437-439.
[10]N. Shibata, Y. Uemura, Y. Kawamoto, L. Yi, M. Fujita and T. Nagatsuma, "600-GHz-Band Frequency-Division Multiplexing Communication with Silicon Unclad Diplexer," 2021 IEEE Asia-Pacific Microwave Conference (APMC), Brisbane, Australia, Nov. 28 - Dec 01, 2021, pp. 139-141.
[11]Y. Wang, R. Kaname, L. Yi and T. Nagatsuma, "High-speed 600-GHz-Band Terahertz Imaging System Using Polygon Mirror," 2021 International Topical Meeting on Microwave Photonics (MWP), Pisa, Italy, 2021, pp. 1-4.
[12]N. Shibata, Y. Uemura, Y. Kawamoto, Li Yi, M. Fujita, and T. Nagatsuma, "600-GHz-Band Silicon Dielectric Waveguide Module," in Proc. 46th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz), Chengdu, China, Aug. 29-Sep. 3, 2021.
[13]R. Kaname, T. Sagisaka, Li Yi, and T. Nagatsuma, "600-GHz-Band Terahertz Imaging System Using Frequency-Independent Concave Mirror," in Proc. 2020 International Topical Meeting on Microwave Photonics (MWP), Matsue, Japan, Nov. 24-26, 2020, pp. 58-61.
[14]Y. Uemura, Y. Kawamoto, N. Shibata, L. Yi, and T. Nagatsuma, "600-GHz-Band Heterodyne Receiver System Using Photonic Techniques," in Proc. 2020 International Topical Meeting on Microwave Photonics (MWP), Matsue, Japan, Nov. 24-26, 2020, pp. 256-259.
[15]T. Sagisaka, R. Kaname, L. Yi, and T. Nagatsuma, "Integrated Terahertz Optics with Effective Medium for 600-GHz-Band Imaging," in Proc. 2020 International Topical Meeting on Microwave Photonics (MWP), Matsue, Japan, Nov. 24-26,2020, pp. 60-62.
[16]L. Yi, R. Kaname, Y. Nishida, X. Yu, M. Fujita, and T. Nagatsuma, "Imaging Applications with a Single Resonant Tunneling Diode Transceiver in 300-GHz Band," in Proc. 2020 International Topical Meeting on Microwave Photonics (MWP), Matsue, Japan, Nov. 24-26, 2020, pp. 120-123.
[17]T. Nagatsuma, F. Ayano, K. Toichi, L. Yi, M. Fujiwara, N. Iiyama, J. Kani, and H. Ito, "Wireless communication using Fermi-level-managed barrier diode receiver with J-band waveguide-input port," in Proc. IEEE/MTT-S Int. Microwave Symp. (IMS), Los Angeles, CA, USA, Jun. 21-26, 2020, pp. 631-634.
[18]T. Nagatsuma, M. Sonoda, T. Higashimoto, L. Yi, and J. Hesler, "12.5-Gbit/s wireless link at 720 GHz based on photonics," in Proc. 44th Int. Conf. Infrared, Millimeter, and Terahertz Waves (IRMMW-THz), Paris, France, Sep. 1-6, 2019.
[19]L. Yi, K. Iwamoto, T. Yamamoto, F. Ayano, A. Rolland, N. Kuse, M. Fermann, Y. Li, and T. Nagatsuma, "300-GHz-band wireless communication using a low phase noise photonic source," in Proc. 49th Eur. Microwave Conf. (EuMC), Paris, France, Oct. 1-3, 2019.
[20]T. Nagatsuma, M. Sonoda, T. Higashimoto, R. Kimura, L. Yi, and H. Ito, "300-GHz-band wireless communication using Fermi-level managed barrier diode receiver," in Proc. IEEE MTT-S Int. Microwave Symp. (IMS), Boston, MA, USA, Jun. 2-7, 2019, pp. 762-765.
[21]K. Kikuta, L. Yi, L. Zou, and M. Sato, "Robust subsurface velocity change detection method with Yakumo multistatic GPR system," in Proc. IEEE Int. Geosci. Remote Sens. Symp. (IGARSS), Yokohama, Japan, Jul. 28-Aug. 2, 2019, pp. 3582-3585.
[22]L. Yi, L. Zou, and M. Sato, "A simplified velocity estimation method for monitoring the damaged pavement by a multistatic GPR system," in Proc. 17th Int. Conf. Ground Penetrating Radar (GPR), Rapperswil, Switzerland, Jun. 18-21, 2018.
[23]L. Yi, K. Takahashi, and M. Sato, "Application of L1 norm approach to data acquired by the array GPR Yakumo," in Proc. 10th Eur. Conf. Antennas Propagation (EuCAP), Davos, Switzerland, Apr. 10-15, 2016.
[24]L. Yi, K. Takahashi, and M. Sato, "Enhancement of the migrated results with the deblurring filter," in Proc. Eur. Geosci. Union General Assembly, Vienna, Austria, Apr. 17-22, 2016.
[25]M. Sato, L. Yi, Y. Iitsuka, L. Zou, and K. Takahashi, "Optimization of antenna polarization of the multistatic GPR system Yakumo," in Proc. 16th Int. Conf. Ground Penetrating Radar (GPR), Hong Kong, China, Jun. 13-16, 2016.
[26]L. Yi, K. Takahashi, and M. Sato, "Estimation of vertical velocity profile by multistatic GPR Yakumo," in Proc. Int. Geosci. Remote Sens. Symp. (IGARSS), Milan, Italy, Jul. 26-31, 2015.
[27]L. Yi, K. Takahashi, and M. Sato, "Optimization of data sampling and imaging reconstruction by GPR," in Proc. 15th Int. Conf. Ground Penetrating Radar, Brussels, Belgium, Jun. 30-Jul. 4, 2014.
[28]L. Yi, K. Takahashi, and M. Sato, "Archaeological survey of Dangoyama kofun by 3DGPR," in Proc. 11th SEGJ Int. Symp., Yokohama, Japan, Nov. 18-22, 2013.