A major shift is happening right now, in fact it's not an exaggeration to call it a revolution. Back in the day, like back when Daniel DeFoe was writing The Plague Years, we had hydraulics and water pressure through pipes and channels, and that was the predominant technological paradigm. This started with agriculture and irrigation. Everything was explained as if it were pipes and pressure. Somewhere in between the pipes went from carrying water to carrying steam, and then air itself, and we got the internal combustion engine, right after the steam engine. That gave us the industrial revolution.
Then electricity happened. And it's still electricity. The internet is a bunch of electrical pulse patterns. Even the fiber optic cable, which carries photons, gets converted to electrical signals at the end. That's about to be over.
Now it's light. Granted, quantum computers can use electrons, which aren't photons, but the end result is mostly photons doing the work.
And this is a big deal, revolutionary you could call it, because it seems inevitable that this will upend the current "revolution" in artificial intelligence, which to be honest seems more about economic happenstance and less about revolutionary technology. Using GPUs for deep learning is kind of a kludge, meaning it wasn't designed this way on purpose, instead someone (Bill Dally to Andrew Ng?) said, hey I bet these GPUs could do what you're trying to do better, and so it happened. It's still electricity.
But not anymore. Now it's light, and that changes everything, and that's because the light itself computes. That's right, the light itself is the computer. ("But that doesn't even make sense." Well you're not wrong.) Still not crazy enough? Optical origami computers; which were of course discovered by accident.
Researchers pioneer optical generative models, ushering in a new era of sustainable generative AI
Aug 2025, phys.org
I keep trying but can't seem to explain how different this is to what's currently happening in the world of computing. Then again, I was also confused when Deep Seek released their model and yet it took two weeks for the stock market to realize (true story). To be clear, this requires no internet connection and no data center. In other words, today you might call this magic.
Optical generative models capable of producing novel images using the physics of light instead of conventional electronic computation.The models integrate a shallow digital encoder with a free-space diffractive optical decoder, trained together as one system. Random noise is first processed into "optical generative seeds," which are projected onto a spatial light modulator and illuminated by laser light. As this light propagates through the static, pre-optimized diffractive decoder, it produces images that statistically follow the target data distribution. These models could be embedded in smart glasses, AR/VR headsets, or mobile platforms to enable real-time, on-the-go generative AI.
via UCLA Engineering Institute for Technology Advancement: Shiqi Chen et al, Optical generative models, Nature (2025). DOI: 10.1038/s41586-025-09446-5
Unrelated image credit: Optic nerve head collagen of a pig via Multiphoton - Susannah Waxman Dr Ian Sigal Nikon Small World - 2024
Sustainable AI: Physical neural networks exploit light to train more efficiently
Sep 2025, phys.org
Physical Neural Networks - analog circuits that directly exploit the laws of physics like properties of light beams or quantum phenomena to process information.
Mathematical operations can now be performed through light interference mechanisms on silicon microchips barely a few square millimeters in size.
via Polytechnic University of Milan, École Polytechnique Fédérale, Stanford, Cambridge, and the Max Planck Institute: Ali Momeni et al, Training of physical neural networks, Nature (2025). DOI: 10.1038/s41586-025-09384-2
First device based on 'optical thermodynamics' can route light without switches
Oct 2025, phys.org
Optical Thermodynamics - framework captures how light behaves in nonlinear lattices using analogs of familiar thermodynamic processes such as expansion, compression, and even phase transitions. Rather than actively steering the signal, the system is engineered so that the light routes itself. "First optical device that follows the emerging framework of optical thermodynamics".
via University of Southern California: Hediyeh M. Dinani et al, Universal routing of light via optical thermodynamics, Nature Photonics (2025). DOI: 10.1038/s41566-025-01756-4
| The brain's immune cells, or microglia in light blue/purple interact with amyloid plaques in red - Jason Drees for Arizona State University - Dec 2024 |
First electronic–photonic quantum chip created in commercial foundry
Jul 2025, phys.org
Microring Resonators - a "quantum light factory"; a kind of photonic device that combines quantum light sources and stabilizing electronics using a standard 45-nanometer semiconductor manufacturing process to produce reliable streams of correlated photon pairs.
via Boston University, UC Berkeley, and Northwestern University, and GlobalFoundries and Silicon Valley startup Ayar Labs: Danielius Kramnik et al, Scalable feedback stabilization of quantum light sources on a CMOS chip, Nature Electronics (2025). DOI: 10.1038/s41928-025-01410-5
Photonic origami folds glass into microscopic 3D optical devices
Aug 2025, phys.org
The laser-induced technique triggers precise bending in 3-D printed ultra-thin glass sheets that are so smooth that light reflects off them without distortion.Surprise - The new photonic origami method was discovered by chance when Carmon asked graduate student Manya Malhotra to pinpoint where an invisible laser was hitting the glass by increasing the power until the spot glowed. Instead of glowing, the glass folded - revealing a simple and unexpected way to achieve glass folding. Malhotra then became the pioneering expert in photonic origami.Using the new photonic origami approach, the researchers were able to bend sheets of glass up to 10 microns thick into shapes ranging from a 90-degree knee to helices. They were able to do this with fine control, down to 0.1 microradians."This new technique brings silica photonics - using glass to guide and control light - into the third dimension."
via Tel Aviv University: Manya Malhotra et al, Photonic Origami of Silica on a Silicon Chip with Microresonators and Concave Mirrors, Optica (2025). DOI: 10.1364/OPTICA.560597
Beyond electronics: Optical system performs feature extraction with unprecedented low latency
Oct 2025, phys.org
This is what I call the Op Box, I'm imagining a new type of computer, in the way the Steam Machine has (or is about to) upend the personal computer market, this Op Box will upend the very concept of a computer, and what it means to compute.
Optical Diffraction Operators - plate-like structures that perform calculations as light propagates through them.
This optical feature extraction engine de-serializes the data stream by sampling the input signal into multiple stable parallel branches. [For feature extraction, read recogntion, like facial recognition, etc.]
via Tsinghua University: Run Sun et al, High-speed and low-latency optical feature extraction engine based on diffraction operators, Advanced Photonics Nexus (2025). DOI: 10.1117/1.apn.4.5.056012
