Principal Investigator

Honors and Awards
[15] 2025 2DM Emerging Young Scientist Award from Journal 《2D Materials》 by IOP Publishing (04/2025)
[14] Academy Research Fellowship (Grant: 348920) from Academy of Finland (09/2022 – 08/2025)
[13] Oral Presentation Award at Korean Physical Society Spring Meeting from Korean Physical Society (04/2019)
[12] Grand Presentation Award at Global Ph.D. Fellows Symposium from National Research Foundation of Korea (11/2018)
[11] Poster Presentation Award at Korean Physical Society Branch Meeting from Korean Physical Society (06/2018)
[10] Poster Presentation Award at Global Ph.D. Fellows Symposium from National Research Foundation of Korea (12/2017)
[9] Oral Presentation Award at Global Ph.D. Fellows Symposium from National Research Foundation of Korea (12/2016)
[8] Global Ph.D. Fellowship (Grant: 2015H1A2A1033714) from National Research Foundation of Korea (03/2015 – 02/2020)
[7] Poster Presentation Award at Korean Physical Society Spring Meeting from Korean Physical Society (04/2015)
[6] Valedictorian at Commencement Ceremony Selected to Deliver the Graduation Speech (02/2014)
[5] Excellence Award in Undergraduate Research Program from Korea Foundation for the Advancement of Science and Creativity (12/2012)
[4] Oral Presentation Award at Physics Festival & Contest from Samsung Advanced Institute of Technology (08/2012)
[3] National Scholarship (Admission Fee & Full Tuition) from National Research Foundation of Korea (03/2010 – 02/2014)
[2] Science & Technology Club Support from Korean Federation of Science and Technology Societies (09/2011 – 08/2013)
[1] Science-Gifted Student Affiliated with Korea Daegu City Office of Education (04/2004 – 02/2006)

Professional Services
Peer Review Contribution
[12] Reviewer for Nature Communications
[11] Reviewer for ACS Nano
[10] Reviewer for Advanced Functional Materials
[9] Reviewer for Advanced Optical Materials
[8] Reviewer for Small Structures
[7] Reviewer for Laser & Photonics Reviews
[6] Reviewer for Scientific Reports
[5] Reviewer for Surfaces and Interfaces
[4] Reviewer for Optics Communications
[3] Reviewer fo Optics and Lasers in Engineering
[2] Reviewer for IEEE Transactions on Electron Devices
[1] Reviewer for IEEE International Conference on Nanotechnology
Academic Conference Contribution
[6] Program Committee Member for the 22nd International Symposium on the Physics of Semiconductors and Applications (ISPSA 2026), Semiconductor Physics Division, Korean Physical Society.
[5] Program Committee Member for the 25th Optical Internet Workshop (OIW2025), Optical Society of Korea.
[4] Program Committee Member for the 24th Optical Internet Workshop (OIW2024), Optical Society of Korea.
[3] Session Organizer (Session IV~VI) for the 24th Optical Internet Workshop (OIW2024), Jeju, Republic of Korea, October 31st and November 1st, 2024.
[2] Session Chair (Oral Session VIII) at the 11th Korean Symposium on Graphene and 2D Materials, Busan, Republic of Korea, July 11th, 2024.
[1] Session Organizer and Chair (Two-Dimensional and Nanomaterials, their Fundamentals and Applications) at the 2022 Europe-Korea Conference on Science and Technology, Marseille, France, July 21st, 2022.

Research Projects
[17] Individual Basic Research Program: Outstanding New Researcher's Global Collaborative Project from the Ministry of Science and ICT of the Korean Government (03/2025 – 02/2030)
Low-Power, High-Bandwidth, High-Temperature Tolerant, Monolithically Integrated Optoelectronic Transceiver-Based Interconnect Enabling Wavelength Division Multiplexing without Photonic Circuits for Artificial Intelligence Hyper-Acceleration
Grant Awarded as a Principal Investigator
[16] GIST Future-Leading Specialized Research Project from the GIST (01/2025 – 12/2026)
Development of Post-Process Interconnect and Monolithic-3D-Integration for Optical-Synapse Device-Based Intelligent Semiconductors
[15] AI-Based GIST Research Scientist Project from the GIST (01/2025 – 12/2025)
AI Semiconductors: AI for Devices and Devices for AI
Grant Awarded as a Principal Investigator
[14] Commissioned Research Project from the Electronics and Telecommunications Research Institute (09/2024 – 11/2025)
Establishment of Experimental Environment and Data Acquisition for Single-Pixel Spectral Imaging
Grant Awarded as a Principal Investigator
[13] Science and Technology Innovation Talent Training Project from the Ministry of Science and ICT of the Korean Government  (07/2024 – 12/2030)
Semiconductor Advanced Packaging Specialist Training Project
Consortium with Chosun University, Chonnam National University, Inha University, and 18 Advanced Packaging Small and Medium-Sized Enterprises
[12] Industrial Strategic Technology Development Program from the Ministry of Trade, Industry, and Energy of the Korean Government (07/2024 – 12/2028)
Development of Low CO2 Emission Mn, Si, Cr, and Ni-Containing Multicomponent Ferroalloys Using Metal Byproducts
Grant Awarded as a Principal Investigator at GIST in the Consortium with Research Institute of Industrial Science & Technology
[11] AI-Based GIST Research Scientist Project from the GIST (01/2024 – 12/2024)
Artificial Intelligence Built-in Sensors: Miniaturized and All-in-One Spectrometers Without the Need for Separate Light Source and Diffraction Grating
Grant Awarded as a Principal Investigator
[10] New Faculty Settlement Project from the GIST (12/2023 – 11/2025)
More Than Moore: Quantum Material Interfaces and Nano Devices
Grant Awarded as a Principal Investigator
[9] Academy Research Fellowship from the Academy of Finland (09/2022 – 10/2022)
Single-Junction Broadband Spectrometers
Individual Grant Awarded as a Principal Investigator
[8] Advanced Grants from the European Research Council (09/2020 – 10/2022)
ATOP: Atomically-Engineered Nonlinear Photonics with Two-Dimensional Layered Material Superlattices
[7] Centre of Excellence in Quantum Technology Finland from the Academy of Finland (09/2020 – 08/2022)
Hybrid Architectures / Enabling Technologies / Exploring Unconventional Concepts for Future Quantum Technologies
[6] Horizon Research and Innovation Program from the European Commission (09/2020 – 03/2022)
S2QUIP: Scalable Two-Dimensional Quantum Integrated Photonics
[5] Global Ph.D. Fellowship from the National Research Foundation of Korea (03/2015 – 02/2020)
Conductance Switching of Supercollimated Dirac Electrons by All-Electrically-Controlled Quantum Interference
Individual Grant Awarded as a Principal Investigator
[4] Basic Research Support Program from the Ministry of Science and ICT of the Korean Government (06/2016 – 05/2019)
Carrier Transport of Graphene Quantum Device Formed by Selective Fluorination and Its Application for Ferroelectric Memory
[3] Nuclear Energy Research Infrastructure Program from the National Research Foundation of Korea (06/2015 – 05/2017)
Development of Graphene/Nanowire Hybrid Thin Film on the Surface of SiC Through Electron Beam Irradiation and Creating Localized Point Defects with Electron Spin Unfaired Inside Hexagonal-SiC Substrates
[2] Basic Research Support Program from the Ministry of Science and ICT of the Korean Government (06/2013 – 05/2016)
Influence of Electron-Hole Puddle to Charge Carrier Transport at Graphene/(Semiconductor, Insulator) Interface Studied by Ballistic Electron/Hole Emission Spectroscopy
[1] Undergraduate Research Program from the Korea Foundation for the Advancement of Science and Creativity (05/2012 – 10/2012)
Charge Carrier Transport through Graphene/Semiconductor Interface Studied by Internal Photoemission

Technical Skills (Before GIST)
[1] Equipment Set-Up: Independently built several measurement systems in the starting lab.
- Internal photoemission (IPE) spectroscopy system consisting of Xenon arc lamp (Newport, 6258 / 6259), lamp power supply (Newport, 69911), power cable (Newport, 70050), lamp housing (Newport, 66902), Ozone eater (Newport, 66087), Ozone exhauster (Newport, 66090), optical filter (Newport, 51352 for 830 nm / 51320 for 630 nm / 51272 for 400 nm / 51250 for 309 nm), monochromator (Oriel, Cornerstone 260 1/4), grating (Newport, 74160 for 600 lines/mm in 600~2500 nm / 74167 for 2400 lines/mm in 180~700 nm), optical fiber (Newport, 77634 in 400~1700 nm / 76840 in 500~250 nm),  slit controller (Newport, 74001), optical lens (Newport, SPX011 plano-convex lens for conversion of dispersed light into parallel light / Newport, SBX016 bi-convex lens for focusing of parallel light), lens holder, InGaAs photodiode (Hamamatsu Photonics, G9230-01 in 950~1550 nm) Si photodiode (Hamamatsu Photonics, S2281-04 in 200~1180 nm), low-noise current pre-amplifier (SR570), probe station, and data acquisition card (National Instruments).
- Current-voltage (I–V) measurement system (2-terminal & 3-terminal) with SMU (Keithley, 2636A).
- Capacitance-voltage (C–V) measurement system with precision LCR meter (Agilent, E4980A).
- Cryogenic measurement system with helium compressor (Trillium, 125 / Lakeshore, CRX-4K).
- Photocurrent mapping system with scanning near-field optical microscopy (WITec alpha300).
[2] Electrical/Optoelectrical/Photonic Measurement: I–V measurement, C–V measurement, Cryogenic measurement, Temperature-dependent electrical characterization, IPE spectroscopy, Photocurrent mapping, Photoresponse/switching characterization, Photoluminescence spectroscopy (WITec alpha300 RA+), Continuous-wave laser (WITec focus innovations, Thorlabs MCLS1, Photonetics), Pulsed laser (home-built femtosecond laser).
[3] Material Processing: CMOS-compatible material (Si, SiO2), Wide bandgap semiconductor (SiC), III-V semiconductor (GaAs), High-k dielectric insulator (Al2O3, HfO2), Nanowire and nanotube-like one-dimensional materials (SW/DWCNTs), Graphene and graphene-like two-dimensional materials (Graphene, h-BN, TMDs, BP, InSe, MXenes, etc.), Topological quantum materials (topological insulator: Bi2Se3, Mott insulator: TaS2, etc.).
[4] Wafer Prep: Chemical mechanical polishing (Logitech, ORBIS), RCA Cleaning, native oxide etching, Ohmic contact formation, Backside contact, etc.
[5] Van der Waals integration: Dry transfer, Semi-dry transfer, Wet transfer. Exfoliation, Heterostructure integration.
[6] Etching: Reactive ion etching (TTL, Labstar / TTL, FABstar / Oxford Instruments, Plasmalab 80Plus / Oxford Instruments, PlasmaPro 100 Estrelas), Wet etching (selective etching, diluted etching, dipping, etc).
[7] Deposition/Growth: E-beam evaporation (MASA, IM-9912 / Temescal, FC-2000 / Angstrom Engineering, 09340), Atomic layer deposition (Beneq, TFS-500 / Lucida D100), Plasma enhanced chemical vapor deposition (Oxford Instruments, Plasmalab 80Plus), Sputtering (Oxford Instruments, Plasmalab 400 / Hitachi, E-1045).
[8] Patterning: E-beam lithography (Vistec, EPBG5000pES / NBL, NB3), Photolithography (Suss Microtec, MA/BA6-8).
[9] Annealing: Rapid thermal annealing (Foton-6), Rapid thermal processing (Jipelec), Furnace PEO (PEO-601/ATV).
[10] Structure Analysis: Scanning confocal Raman spectroscopy (WITec alpha300 RA+), Scanning electron microscopy (Hitachi High-Technologies, S-4800 / FEI, Helios Nanolab600), Spectroscopic ellipsometer (Semilab, SE-2000), Ellipsometer (Elipso Technology, Elli-SE-UaM8), Atomic force microscopy (Bruker, Dimension Icon).
[11] Bonding: Wire bonder (TPT, HB02), Wire bonder (Delvotec, 53XX), Wire bonder (FS bondtec, 5330).
[12] Dicing: Dicing saw (Disco, DAD3220 / Aaron, AR06DM).
[13] Program: Labview, Latex, NanoScope Analysis, Project FIVE, Gwyddion, DesignCAD, AutoCAD, KLayout, Matlab, COMSOL, Origin, Illustrator, Photoshop, EndNote, Word, PowerPoint, Excel.
[14] Calculation: Energy band alignments across the interface, Fermi-level pinning effect depending on interface-trap charge density and dipole charge density, Parallel conduction model for an inhomogeneous junction, Areal fraction of low-barrier patches, Time-evolving probability density of electron wave packets in graphene under superlattice potential, Ballistic carrier transport of injected hot electrons into interface or subsurface.

Teaching Skills
Lecturer
[5] Optoelectronics (03/2025 – 06/2025) SE6102 & EC6102
[4] GIST Freshman Class (03/2024 – 06/2024) GS1901-23
[3] Advanced Semiconductor Devices (09/2024 – 12/2024) SE5001 & EC4312
[2] Optoelectronics (03/2024 – 06/2024) SE6102 & EC6102
[1] GIST Freshman Class (03/2024 – 06/2024) GS1901-21
Teaching Assistant
[17] Advanced Placement Course of General Physics (07/2017 – 01/2018)
[16] General Physics Lab (08/2016 – 12/2016)
[15] Advanced Placement Course of General Physics (07/2016 – 01/2017)
[14] Electromagnetism 1 (03/2016 – 06/2016)
[13] Advanced Placement Course of General Physics (07/2015 – 01/2016)
[12] Mathematical Physics 1 (08/2015 – 12/2015)
[11] Mathematical Physics 2 (03/2015 – 06/2015),
[10] Advanced Placement Course of General Physics (07/2014 – 01/2015)
[9] Modern Physics (09/2014 – 12/2014)
[8] Quantum Mechanics 1 (03/2014 – 06/2014)
[7] Modern Physics (08/2013 – 12/2013)
[6] General Physics 1 (03/2013 – 06/2013)
[5] General Physics 2 (08/2012 – 12/2012)
[4] General Physics 1 (03/2012 – 06/2012)
[3] Korea International Mathematics Tournament of the Towns (07/2011 – 08/2011)
[2] Advanced Placement Course of General Physics (01/2011 – 02/2011)
[1] General Physics for International Students (12/2010 – 02/2011)
Tutoring
[3] Prep: UNIST Admission Office Mentoring Program (03/2012 – 02/2014)
[2] Help Room: General Physics (09/2010 – 06/2012)
[1] Help Room: Calculus (03/2010 – 06/2010)

Links
[1] National Researcher Number: 11465648
https://www.iris.go.kr/mbrs/srch/retrieveSrchNumInfo.do
[2] ORCID: 0000-0002-4081-3343
https://orcid.org/0000-0002-4081-3343
[3] Scopus: 59654784500
https://www.scopus.com/authid/detail.uri?authorId=59654784500
[4] Web of Science Researcher: X-8475-2019
https://www.webofscience.com/wos/author/record/X-8475-2019
[5] Google Scholar
https://scholar.google.co.kr/citations?user=IQpA6k0AAAAJ
[6] Researchgate
https://www.researchgate.net/profile/Hoon-Hahn-Yoon
https://www.researchgate.net/lab/QuantumMaterialsInterfaces-andNanoDevices-Laboratory-Hoon-Hahn-Yoon
[7] Linkedin
https://www.linkedin.com/in/hoon-hahn-yoon-a317081ba
[8] Slack
https://qmindhq.slack.com/

Other Activities
[1] Academic Activity in Finland
Vice President of the Society of Korean Scientists and Engineers in Finland (2021 – 2022)
https://www.kosesfi.org
[2] Academic Activity in Europe
Session Organizer of the Europe-Korea Conference on Science and Technology (2022)
https://www.ekc2022.org
[3] Society of Global Ph.D. Fellows Activity
Board Committee of Global Ph.D. Fellowship Society (2015 – 2019)
[4] Alumni Network Activity
President of UNIST Alumni Association (2016 – 2019)
http://alumni.unist.ac.kr
[5] Student Council Activity
President of UNIST Graduate Student Association (2016 – 2017)
https://www.facebook.com/gsaunist
[6] Social Activity
Member of the National Unification Advisory Council in the Republic of Korea (2015)
[7] Summer School Activity
Summer School of Condensed Matter Physics by Korea Physical Society and Korea Institute for Advanced Study (2015)
[8] Club Activity
Vice President of the UNIST Club Association (2012)
https://www.facebook.com/unistclubunion/
President of the UNIST Math & Physics Academic Club (2011)
https://www.instagram.com/unist_eoe/
https://www.facebook.com/eoeunist/