Johannes Galatsanos

In an optical sensor, light enters through a lens, bounces off a photon-detecting surface, and becomes a pixel. That pixel carries maybe 5% of the information the incoming photon actually contained. The rest - 95% of what the universe was trying to tell the camera - gets thrown away before the shutter clicks. For seventy years of satellite imagery, that was just considered the cost of doing business.

Johannes Galatsanos looked at that number and started a company.

Diffraqtion, the Boston startup he co-founded in 2024 with quantum physicist Prof. Saikat Guha and photonics engineer Christine Yi-Ting Wang, is built around a deceptively simple reversal of standard imaging logic. Instead of letting light hit a sensor and then doing AI on top of the resulting image, Diffraqtion transforms the light first - manipulating it through quantum optical processes before any measurement is made. The measurement that follows carries dramatically more information than any conventional sensor could achieve.

The physics behind this approach - bypassing the diffraction limit, the fundamental boundary that constrains how much detail any conventional optical system can resolve - was developed over more than a decade by Prof. Guha, with research funding from DARPA and NASA. What Galatsanos brought was something different: the conviction that a decade of academic quantum optics research could be turned into a product small enough to launch on a cubesat and affordable enough to build a commercial constellation around.

The company name is a deliberate tell. "Diffraqtion" is a misspelling of "diffraction" - the very physical phenomenon their technology is designed to circumvent.

The path to Diffraqtion was not a straight line from physics PhD to startup. Galatsanos grew up in Agios Nikolaos, a small coastal town on the Greek island of Crete, trilingual in English, Greek, and German from childhood. He studied at Goethe University Frankfurt, then Oxford, then MIT - picking up an SM in Technology Management with a specialization in Quantum Engineering along the way. Before any of that resolved into a startup, he spent years at Novartis, eventually becoming Executive Director and Head of Data for Digital Core Transformation, building AI and data products across the pharmaceutical giant's manufacturing and R&D divisions.

That corporate stretch - the regulated environments, the global supply chains, the executive stakeholder management - was not a detour. It is what separates Galatsanos from the theoretical physicist who cannot sell and the salesperson who cannot read a wave function. He sat in Novartis boardrooms translating quantum concepts into business strategy while Guha was publishing papers on photon-counting receivers at MIT. When they connected, the missing piece for both was standing right there.

Diffraqtion's immediate commercial target is space domain awareness - knowing where satellites are, what condition they are in, and what other satellites are doing near them. This is a problem that the U.S. Department of Defense describes as critical and increasingly urgent, as low-Earth orbit grows more congested. The DARPA SBIR Direct-to-Phase II contract the company secured in late 2025 - a $1.5M validation that skips the usual Phase I proof-of-concept requirement - puts government credibility behind the technology at a stage when most startups are still pitching slides.

The product roadmap runs through 2029: ground-based telescope demonstrations with UC Observatories in 2026-2027, DARPA validation through 2027, the Galileo-1 space domain awareness satellite launching in 2028, and a second satellite targeting Earth observation and missile defense integration by 2029. After that, Diffraqtion has stated ambitions to integrate its cameras into NASA's Habitable Worlds Observatory - the successor to James Webb and Hubble.

None of that happens with a crowd shot from a conference and a pitch deck. The November 2025 SLUSH 100 win - first prize out of more than 1,000 European startups, a €1M equity investment from Cherry Ventures and General Catalyst - was the moment the company went from "interesting quantum physics story" to a venture the European and American investment community began taking seriously. Galatsanos walked onto the SLUSH stage with a 12-person team, a DARPA contract, and physics that nobody could easily dismiss. He walked off with the competition.

For the Greek diaspora press, the SLUSH win was a national moment - covered by Greek Reporter, New Greek TV, and Greek City Times as evidence of what a kid from Crete can build when he passes through Frankfurt, Oxford, MIT, and Novartis before landing in a Boston lab with equations covering the walls. For Galatsanos, it was more tactical: the prize money and profile accelerated the pre-seed fundraise that followed in January 2026, when QDNL Participations led a $4.2M round joined by milemark capital, Aether VC, ADIN Ventures, and Offline Ventures.

Total funding as of mid-2026 stands at $4.3M, plus $1.5M in non-dilutive DARPA funding - a lean war chest for a company proposing to put quantum cameras in orbit, but one that has been stretched considerably by the non-dilutive government backing that deep tech hardware startups with genuine defense applications can access.