UPM3@KAIST - Research Works

UPM3 Research Works (연구분야)

Research Objective (본 연구단의 연구목표)

Advancing ultra-precision light source technology from IR to EUV regime using femtosecond pulse lasers, and interdisciplinary applications including high-precision optical metrology, nano/micro material processing/synthesis, precision spectroscopy, time/frequency standards, and future space missions.

The objective of our research is to exploit the newly emerging field of ultrafast optics so as to establish ultra-precision technologies that will enable nano-fabrication and metrology over extensive ranges as demanded in the next generation of precision engineering. To the end, a systematic approach will be pursued to generate noble coherent light sources covering the whole optical spectrum spanning from the THz wave to the EUV by making the most of femtosecond laser pulses. The study aiming to investigate ultrafast optics for improving the level of ultraprecision comprises a series of research subjects that are categorized into five groups as follows:

Developments of new ultrafast light sources
Ultrafast photonics for next-generation space missions
Ultrafast photonics for nano-manufacturing
Ultra-precision dimensional metrology
Ultrafast plasmonics and coherent EUV generation

These itemized R&D subjects are investigated individually in parallel with each other, with focus on creating their possible contributions for the advance of fundamental ultra-precision science and technology. And, at the same time, the achieved results of the subject will be synthesized and combined together to demonstrate their usefulness as basic core technologies enabling a wealth of industrial applications of ultra-precision.

KAIST Research-Vol.2(국문)_김영진_도약연구2_발췌.pdf

페이지_ K-light Vol. 4 no. 3 (2021.07)-web ver_실험실_소개.pdf

Detailed Research Subjects (세부 연구주제)

- Development and stabilization of ultrafast light sources
- High-precision surface metrology using femtosecond light pulses
- High-precision time-of-flight (TOF) measurement using ultrafast light pulses
- Precision spectroscopic LIDAR using two femtosecond lasers
- Real-time absolute distance measurement by multiple wavelength referenced to the frequency comb
- Long-term stable coherent EUV generation using high-power fiber femtosecond laser
- High-power Yb-fiber femtosecond laser for non-thermal material processing
- Coherent, efficient and compact EUV generation by plamonic field enhancement at metallic nano structures

Research Highlights (대표 연구실적)

- G. Kang, J. Kim, M.-R. Kim, Y. Lee, D.-C. Shin, J. Jeon, H. Kim, D.H. Kim, J. Lee, S. Park and Young-Jin Kim* (corresponding author), "Nanometre-precision terahertz interferometry for battery electrode metrology," Nature Communications, in press(2026) [PDF DOWNLOAD]
- D.-C. Shin, B.S. Kim, H. Jang, Young-Jin Kim* (corresponding author), and S.-W. Kim, "Photonic comb-rooted synthesis of ultra-stable terahertz frequencies," Nature Communications, 14, 790 (2023) [PDF DOWNLOAD]
- B.-S. Moon, T.K. Lee, W.C. Jeon, S.K. Kwak, Young-Jin Kim* (corresponding author) and D.-H. Kim*, "Continuous-wave upconversion lasing with a sub-10 W cm−2 threshold enabled by atomic disorder in the host matrix," Nature Communications, 12, 4437 (2021) [PDF DOWNLOAD]
- N.D. Anh, B.J. Chun, S. Choi, D.-E. Kim, S. Kim and Young-Jin Kim* (corresponding author), "Plasmonic dynamics measured with frequency-comb-referenced phase spectroscopy," Nature Physics, 15, 132-137 (2019) [PDF DOWNLOAD]
- H.J. Kang, J.-W. Yang, B.J. Chun, H. Jang, B. Kim, Young-Jin Kim* (corresponding author) and S.-W. Kim, "Free-space transfer of comb-rooted optical frequencies over an 18 km free-space link," Nature Communications, 10, 4438 (2019) [PDF DOWNLOAD]
- X.T. Geng, B.J. Chun, J.H. Seo, K. Seo, H. Yoon, D.E. Kim, Young-Jin Kim* (corresponding author) and S. Kim, "Frequency comb transferred by surface plasmon resonance," Nature Communications, 7, 10685 (2016) [PDF DOWNLOAD]
- J. Lee*, Young-Jin Kim* (equally contributed first author), K. Lee, S. Lee, and S.-W. Kim, “Time-of-flight measurement with femtosecond light pulses,” Nature Photonics, 4, 716-720 (2010) [PDF DOWNLOAD]
- S. Han, H. Kim, Y. W. Kim, Young-Jin Kim, S. Kim, I.-Y. Park and S.-W. Kim*, "High harmonic generation by field-enhanced femtosecond pulses in metal-sapphire nanostructure," Nature Communications, 7, 13105 (2016) [PDF DOWNLOAD]
- I.-Y. Park, S. Kim, J. Choi, D.-H. Lee, Young-Jin Kim, M. F. Kling, M. I. Stockman, and S.-W. Kim, “Plasmonic generation of ultrashort extreme-ultraviolet light pulses,” Nature Photonics, 5, 677-681 (2011) [PDF DOWNLOAD]
- S. Kim, J. Jin, Young-Jin Kim, I.-Y. Park, Y. Kim, and S.-W. Kim, “High-harmonic generation by resonant plasmon field enhancement,” Nature, 453, 757-760 (2008) [PDF DOWNLOAD]

- Cheolmin Kim, Han Ku Nam, Mingu Kang, Tongmei Jing, Kichul Lee, Dongwook Yang, Ji-Hwan Ha, Yeongjae Kwon, Younggeun Lee, Young-jin Kim* (corresponding author), and Inkyu Park*, "Wooden green multi-gas sensors with femtosecond laser-induced graphene for sustainable environmental monitoring," Chemical Engineering Journal, 530, 173407 (2026) [PDF DOWNLOAD]
- Dongwook Yang, Han Ku Nam, Younggeun Lee, Soongeun Kwon, Joohyung Lee, Hyosang Yoon, Young-Jin Kim* (corresponding author), "Space-qualified graphene smart textiles for next-generation spacesuits and space telescopes enabled by femtosecond laser pulses," Advanced Functional Materials, 2024, 2411257 (2024) [PDF DOWNLOAD]
- Truong-Son Dinh Le, Dongwook Yang , Han Ku Nam , Younggeun Lee , Chwee Teck Lim , Bong Jae Lee , Seung-Woo Kim and Young-Jin Kim* (corresponding author), "Low-cost and high-performance 3D laser-induced graphene evaporator for continuous solar-powered water desalination," ACS Nano, [PDF DOWNLOAD] (2024)
- Han Ku Nam, Jungrak Choi, Tongmei Jing, Dongwook Yang, Younggeun Lee, Young-Ryeul Kim, Truong-Son Dinh Le, Byunggi Kim, Liandong Yu, Seung-Woo Kim, Inkyu Park and Young-Jin Kim* (corresponding author), "Laser-induced graphene formation on recycled woods for green smart furniture," EcoMat 2024, e12447 (2024) [PDF DOWNLOAD]
- Young-Ryeul Kim, Han Ku Nam, Younggeun Lee, Dongwook Yang, Truong-Son Dinh Le, Seung-Woo Kim, Sangbaek Park and Young-Jin Kim* (corresponding author), "Green supercapacitor patterned by synthesizing MnO/laser-induced-graphene hetero-nanostructures on wood via femtosecond laser pulses," Biochar, 6, 36 (2024) [PDF DOWNLOAD]
- Han Ku Nam, Yong Kwon Chae, Seoung-Jin Hong, Younggeun Lee, Dongwook Yang, Byunggi Kim, Sang Wook Kang* and Young-Jin Kim* (corresponding author), "Smart denture with embedded thin-film temperature sensors patterned by femtosecond laser pulse for elderly healthcare," Advanced Intelligent Systems, 2024, 2400484 (2024) [PDF DOWNLOAD]
- Dongwook Yang, Han Ku Nam, Truong-Son Dinh Le, Younggeun Lee, Young-Ryeul Kim, Seung-Woo Kim, Soongeun Kwon,* and Young-Jin Kim* (corresponding author), "Multi-modal E-Textile Enabled by One-step Maskless Patterning of Femtosecond-Laser-Induced Graphene on Nonwoven, Knit, and Woven Textiles," ACS Nano, in press (2023) [PDF DOWNLOAD]
- Jianing An, Van Thai Tran, Hai Xu, Wenshuai Ma, Xingkuan Chen, Truong Son Dinh Le, Hejun Du, Gengzhi Sun, and Young-Jin Kim* (corresponding author), "High-throughput Manufacturing Multimodal Epidermal Mechanosensors with Superior Detectability Enabled by a Continuous Microcracking Strategy," Advanced Science, accepted for publication (2023)
- Tran Thanh Tung, Ana L. C. Pereira, Eric Poloni, Nhat-Minh Dang, James Wang, Truong-Son Dinh Le, Young-Jin Kim, Quoc Hue Pho, Md J. Nine, Volker Hessel, Dusan Losic*, "Irradiation Methods for Graphene-based Materials Production," Applied Physics Reviews, accepted for publication (2023)
- Truong-Son Dinh Le, Hoang-Phuong Phan, Soongeun Kwon, Sangbaek Park, Yeongju Jung, Jinki Min, Byung Jae Chun, Hana Yoon, Seung Hwan Ko, Seung-Woo Kim, and Young-Jin Kim* (corresponding author), "Recent Advances in Laser-Induced Graphene: Mechanism, Fabrication, Properties, and Applications in Flexible Electronics," Advanced Functional Materials, 2022, accepted for publication (2022) [PDF DOWNLOAD]
- Truong-Son Dinh Le, Yeong A. Lee, Han Ku Nam, Kyu Yeon Jang, Dongwook Yang, Byunggi Kim, Kanghoon Yim, Seung-Woo Kim, Hana Yoon, and Young-Jin Kim* (corresponding author), "Green flexible graphene-inorganic-hybrid micro-supercapacitors made of fallen leaves enabled by ultrafast laser pulses," Advanced Functional Materials, 2021, 2107768 (2021) [PDF DOWNLOAD]
- June Sik Hwang, Srinivasan Arthanari, Jong-Eun Park, Minyang Yang, Sanha Kim, Seung-Woo Kim, Huseung Lee, and Young-Jin Kim,* (corresponding author), "One-step Template-free Laser Patterning of Metal Microhoneycomb Structures," Small Methods, 2022, 2200150 (2022) [PDF DOWNLOAD]
- C. Yu, J. An, Q. Chen, J. Zhou, W. Huang, Y.-J. Kim* (corresponding author) and Gengzhi Sun, "Recent advances in design of flexible electrodes for miniaturized supercapacitors," Small Methods, 1900824 (2020) [PDF DOWNLOAD]
- Young-Jin Kim* (corresponding author), Dongwook Yang, Han Ku Nam, Truong-Son Dinh Le, Younggeun Lee, Soonkeun Kwon, "Direct-laser-conversion of Kevlar textile to laser-induced-graphene for realizing fast and flexible fabric strain sensors," CIRP Annals, in press [PDF DOWNLOAD] (2022)
- Young-Jin Kim* (corresponding author), Truong-Son Dinh Le, Han Ku Nam, Dongwook Yang, Byunggi Kim, "Wood-based flexible graphene thermistor with an ultra-high sensitivity enabled by ultraviolet femtosecond laser pulses," CIRP Annals, 70, 443-446 (2021) [PDF DOWNLOAD]
- T.-S.D. Le, S. Park, J. An, P.S. Lee and Young-Jin Kim* (corresponding author), "Ultrafast laser pulses enable one-step graphene patterning on woods and leaves for green electronics," Advanced Functional Materials, 2019, 2902771 (2019) [PDF DOWNLOAD]
- T.-S.D. Le, J. An, Y. Huang, Q. Vo, J. Boonruangkan, T. Tran, S.-W. Kim, G. Sun, and Young-Jin Kim* (corresponding author), "Untrasensitive anti-interference voice recognition by bio-inspired ski-attachable self-cleaning acoustic sensors," ACS Nano, 13, 13293-13303 (2019) [PDF DOWNLOAD]
- S. Agarwala, G. L. Goh, L. D. T. Son, J. An, Z. K. Peh, W. Y. Yeong, and Young-Jin Kim* (corresponding author), "Wearable bandage-based strain sensor for home healthcare: combining 3D aerosol jet printing and laser sintering," ACS Sensors, 4, 218-226 (2018) [PDF DOWNLOAD]
- S. Park, H. Lee, Young-Jin Kim* (corresponding author) and P. S. Lee, "Fully laser-patterned stretchable micro-supercapacitors integrated with soft electronic circuit components," NPG Asia Materials, 10, 959-969 (2018) [PDF DOWNLOAD]
- J. An, T.-S. Le, C. H. Lim, V.-T. Tran, Z. Zhan, Y. Gao, L. Zheng, G. Sun, and Young-Jin Kim* (corresponding author), "Single-step selective laser writing of flexible photodetectors for wearable optoelectronics," Advanced Science, 5, 1800496 (2018) [PDF DOWNLOAD]
- J. An, T.-S.D. Le, Y. Huang, Z. Zhan, Y. Li, L. Zheng, W. Huang, G. Sun and Young-Jin Kim* (corresponding author), “All-graphene, flexible, and non-contact electronic skin,” ACS Applied Materials and Interfaces, 9, 44593-44601 (2017) [PDF DOWNLOAD]

Research Funding (연구과제 현황)

- National Research Foundation (NRF) of Korea (한국연구재단): 중견연구자사업(개인), 국가과학자사업(개인), 기초연구실사업(집단)
- KAIST: KAIST UP도약사업, KAIST 권오현 조교수 과제, KAIST End-Run 사업화 과제
- Ministry of Agriculture, Food and Rural Affairs (농림축산식품부): 농업에너지 자립형산업모델 기술개발사업 - 목질계 바이오에너지 산업화 사업
- Korea Forest Service (산림청): 산림과학기술 연구개발사업
- Korea Institute of Machinery and Materials (KIMM) (한국기계연구원): 기능성 나노소자 제조공정 및 장비개발 - 나노기반 옴니텍스 제조기술 개발
- SK Hynix: 펨토초 레이저 기반 다조화파 위상변조 검출을 이용한 나노구조 및 물성 계측기술 개발
- INTEK-PLUS: 다파장 간섭계 기반 대면적 고단차 고속 3차원 형상 측정기술
- SatReci: 인공위성 광통신 탑재체 소형화 모듈개발

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