MIT 'Implosion Carving' Shrinks 3D Nanophotonic Devices 2,000-Fold for Visible-Light Optical Computing
Tags AI · Hardware · Infrastructure
MIT researchers developed 'implosion carving,' a fabrication technique that creates 3D nanophotonic devices by laser-patterning hydrogels and shrinking them to 1/2,000 of their original volume, achieving sub-100nm feature sizes capable of manipulating visible light. The technique, published in Nature Photonics, demonstrated a photonic neural network that can perform digit classification. The process uses photopatterning to create vacancies in a hydrogel, then shrinks it through ion soaking and supercritical drying. Current photonic fabrication techniques cannot achieve the sub-100nm resolution needed for visible-light applications. The researchers plan to extend the technique to build optical devices for cell classification and high-throughput tissue imaging.
Technical significance
Optical computing has long been limited by the inability to fabricate 3D structures at the sub-100nm scale needed for visible light. Implosion carving solves this by decoupling patterning resolution from final feature size through controlled shrinkage. If the technique can be scaled and adapted to non-hydrogel materials, it could enable practical optical neural networks that perform inference at the speed of light with dramatically lower energy consumption than electronic GPUs.