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We are the ones building it.
Technology
At the heart of GQT is Single-Photon Detection (SPD). Our SPAD and SPD technologies compress complex quantum optics into photonic and silicon chips — delivering extreme sensitivity, compact form factor, and commercially viable quantum infrastructure.
SPAD / SPD
Single-photon precision
Detect a single photon with up to 10⁸× gain. Our InGaP/GaAs and InGaAs SPAD technologies are designed for harsh environments and national-scale security infrastructure.
Integrated QPIC
From racks to palm-sized
Quantum photonic integrated circuits (QPIC) shrink full telecom racks into palm-sized modules — enabling dense deployment in encryptors, sensors, and edge devices.
Platform engine
One core, many products
The same SPD engine powers miniaturized QKD, Single-Photon LiDAR, and quantum biosensors — compounding design, testing, and manufacturing efficiency.
Products
One single-photon engine powers four product lines — SPD instrumentation, compact QKD, Single-Photon LiDAR, and a quantum biosensor platform.
Stand-alone instrument · Lab & OEM
A compact, high-performance single-photon detector bringing quantum-grade sensitivity to labs and OEM partners.
National quantum-safe networks
95% smaller and 85% cheaper than legacy racks — enabling nation-scale QKD deployment across telcos and defense networks.
3D sensing · Defense & rescue
Concept-stage LiDAR architecture using SPAD arrays and precise timing electronics, aimed at imaging through fog, smoke, and low light for defense and search-and-rescue missions.
POCT · Early cancer & One-Health
A roadmap-stage biosensor platform using quantum-grade photon sensitivity for ultra-low-concentration biomarker detection in POCT, early cancer screening, and One-Health diagnostics.
QKD
Side-by-side comparison of rack-based legacy QKD versus GQT’s compact photonic-integrated QKD module.
Legacy QKD
Rack-based QKD system with large footprint, higher power consumption, and high deployment cost.
Compact QKD
GQT’s compact photonic-integrated QKD module designed to fit next to modern encryptors.
Receiver – dummy – Sender
LiDAR
Single-Photon LiDAR provides high-sensitivity 3D imaging in low-visibility environments such as fog, smoke, haze, and dust. Using SWIR InGaAs SPAD arrays and time-correlated single-photon counting (TCSPC), it enables reliable depth sensing where classical LiDAR and EO/IR cameras fail.
Single-Photon LiDAR detects individual photons returned from the scene, even under heavy scattering conditions. SPAD arrays combined with TCSPC measure the precise arrival time of single photons, reconstructing a high-resolution 3D depth map with extremely low signal levels.
LiDAR Concept
A 256×256 SWIR InGaAs SPAD-based Single-Photon LiDAR core can be deployed across multiple high-value sectors:
Biosensor
Enzyme-free, single-photon based molecular diagnostics for POCT and early cancer detection — building a roadmap-stage platform aligned with global One-Health initiatives.
Fast testing concepts for human and veterinary applications, aligned with global One-Health diagnostics.
Targeting ultra-low concentration biomarkers using quantum-grade photon sensitivity, pushing toward truly early-stage detection.
A patented technology of Genesis Quantum Inc.
Media
About
GQT Korea was founded by the team that built Korea’s first industrial quantum communication lab at SK Telecom and contributed to global QKD commercialization at ID Quantique. We bring quantum to the real world: deployed, certified, manufacturable.
Headquartered in Daejeon, Korea with a U.S. presence in Alexandria, VA, GQT builds quantum infrastructure that protects and powers allied nations.
Snapshot
Quantum key distribution demonstration – 2015
KBS coverage of Korea’s QKD demonstration at the U.S. Capitol Rayburn House Office Building (2015).
National convergence QKD network – 2021
World’s first nationwide QKD network deployment (Korea, 2021)
Team
A team with decades of experience in QKD deployment, SPAD/SPD development, LiDAR architectures, biosensing, and national-scale quantum programs.
Founder & CEO
Sean Seunghwan Kwak
Founded Korea’s first industrial quantum lab at SK Telecom and later served as EVP at ID Quantique, now leading GQT’s multi-product quantum platform.
“I'm not a theorist — I bring quantum to the real world.”
EVP · SPAD & SPAD Array
Chan-yong Park, Ph.D.
VP · SPD
SB Cho, Ph.D.
VP · Quantum Optics
Bob Jeongsik Cho, Ph.D.
VP · SPAD & SPAD Array
Soo-hyun Baek, Ph.D.
VP · Quantum SoC
Cris Kim, Ph.D.
Inside Director · Operations
Jiyoung Kim
Oversees corporate operations, finance, and governance, ensuring GQT’s roadmap aligns with execution and compliance.
Outside Director · CPA
Hongcheol Kwon
Provides governance and financial oversight as GQT expands across Korea, the U.S., and allied markets.
Contact / 연락처
Telcos, defense contractors, hospital systems, governments, and investors — we’re ready to build with you.
Email / 이메일 · yj.hong@genesisqt.com
Phone / 전화 · +82 2 448 7002
Web / 웹사이트 · www.genesisqt.com
Korea Offices / 한국 오피스
HQ / 본사
대전광역시 유성구 테크노9로 35, 2층 204호
2F, #204, 35 Techno 9-ro, Yuseong-gu, Daejeon, Republic of Korea
R&D Lab / 연구소
서울특별시 송파구 송파대로 201, B동 1519호
B-1519, 201 Songpa-daero, Songpa-gu, Seoul, Republic of Korea
Bio Research Lab / 바이오 연구소
인천광역시 연수구 송도문화로 119, 지원센터동 B1025-2호 (송도동)
B1025-2, Support Center Building, 119 Songdomunhwa-ro, Yeonsu-gu, Incheon, Republic of Korea
U.S. Office / 미국 지사
US Office
4601 Pinecrest Office Park Dr #E, Alexandria, VA 22312, USA