Quantum Photodetector Company "Quad" Secures 2.1 Billion Won in Pre-Series A Funding

Quad, a specialist company in superconducting nanowire single-photon detectors (SNSPDs), announced on June 22, 2026, that it has completed a Pre-Series A investment round, raising 2.1 billion won. This round included participation from Bluepoint Partners, Dongguk Investment, Seoul National University Technology Holdings, and the Youth Innovation Startup Research Institute.

Quad, a specialized company in superconducting nanowire single-photon detectors (SNSPD), announced on the 22nd that it secured a Series Pre-A investment of 2.1 billion KRW from Bluepoint Partners and others. Photo by Bluepoint Partners

Quad is the first quantum photodetector specialist company in Korea. Its core technology is SNSPD, an ultra-sensitive sensor capable of detecting photons, the smallest unit of light. The company manufactures its own light-detecting devices and has independently developed a system that can reliably operate these devices in an ultra-low temperature environment at around -269°C. The core team, including CEO Oh Byeongdu, has accumulated research, process, equipment, and business experience at organizations such as IBM, LG, the Electronics and Telecommunications Research Institute (ETRI), and the Korea Nanotechnology Research Society.

SNSPDs are characterized by their fast response speed and extremely low noise, making them suitable for diverse industries, including semiconductor process defect inspection, medical imaging, autonomous vehicle LiDAR, and defense surveillance. In particular, as countries around the world move to build quantum infrastructure, SNSPDs are gaining attention as core components for quantum computers and quantum communication.

Quad is currently carrying out a quantum sector project as part of the Ministry of SMEs and Startups’ “Super-gap Startup 1000+ Project.” In addition, the company is jointly working with the Korea Nanotechnology Research Society (KANC) to optimize device processes and develop mass production processes.

Oh Byeongdu, CEO of Quad, stated, “We will supply essential components for the quantum industry with high-sensitivity quantum sensors that surpass the limitations of existing sensor technologies,” adding, “Based on this investment, we will first pursue commercialization of modules for semiconductor inspection and then expand into markets such as defense, space optical communication, and quantum computing infrastructure.”

This content was produced with the assistance of AI translation services.