Rays and Waves

In a quiet laboratory, bursts of ultrafast laser light are etching humanity’s information deep inside glass, layer by layer, voxel by voxel. Long after today’s hard drives and magnetic tapes have failed, this glass may still faithfully preserve our data, readable thousands of years into the future.In this episode of Rays and Waves, Daniel and Steven dive into Microsoft Research’s Project Silica with their Senior Optical Engineer James Clegg. This is an ambitious effort to redefine cold data storage using focused femtosecond lasers. By writing information as sub‑micron, laser‑induced modifications to optical properties in hundreds of stacked layers, Project Silica turns glass into a truly three‑dimensional memory medium. These tiny structures are projected to remain stable for over 10,000 years and can be read out at any time using wide‑field microscopy combined with powerful machine‑learning algorithms.Our conversation explores the physics behind laser‑matter interactions, the optical engineering challenges of writing and reading data in three dimensions, and what it takes to scale such a radical storage technology. We also discuss why long‑term archival storage matters, how this approach compares to traditional media, and what it means to build technology with millennia‑long time horizons.Project Silica has been under development at Microsoft for nearly a decade, and the team recently published a comprehensive open‑access Nature paper detailing this remarkable achievement: https://www.nature.com/articles/s41586-025-10042-wIf you enjoy the show, share it with your colleagues, subscribe, and leave us a review! Got thoughts or questions? Reach out at rays.and.waves.podcast@gmail.comIntro music is Good Vibe by Twisterium. Thanks for the great tunes!Outro music is Aranas Ananas with James Clegg on drums!

In this episode of Rays and Waves, Daniel and Steven take a nostalgic dive back into the world where they both began their scientific journeys: optical tweezers. These remarkable tools, using tightly focused laser beams to exert forces and torques on microscopic objects, have transformed how we manipulate cells, DNA, bacteria, and so much more. Their invention by Arthur Ashkin in 1986 ultimately earned him the 2018 Nobel Prize in Physics, and today, optical manipulation stands as a thriving field with thousands of active researchers.Our guest is one of its true pioneers. For more than four decades, Halina Rubinsztein‑Dunlop has been at the forefront of exploring how light can push, twist, and guide matter. Her work spans quantum optics, optically driven micromachines, and cutting‑edge applications in biological systems. Her impact has been recognized at the highest levels, including the SPIE Gold Medal (the society’s most prestigious honor), and she will soon serve as an SPIE Director for the 2026–2028 term.Halina is also a powerful advocate for women in science, a topic we excitedly dive into during our conversation.If you enjoy the show, share it with your colleagues, subscribe, and leave us a review! Got thoughts or questions? Reach out at rays.and.waves.podcast@gmail.comIntro music is Good Vibe by Twisterium. Thanks for the great tunes!

The current narrative is that Artificial Intelligence is reshaping industries at breakneck speed. Is optics no exception? In this special episode of Rays and Waves Daniel and Steven host the show's very first panel discussion! They bring together six experts from across the optics landscape to try to understand: How will AI change optical engineering?From accelerating lens design to enabling smarter photonic systems, AI promises breakthroughs but also raises big questions about trust, transparency, and the role of human expertise.The panel consists of Craig Olsen, Jenny Atwood, Erin Elliot, Akil Bhagat, Cory Boone, and Roinan Siew, and they cover the opportunities and challenges that come with integrating AI into optical workflows.Stuff mentioned in the episode:Material Craig mentioned Ronian sent out: Future of optical system and lens design in the AI eraThe effect Craig mentions is Gell-Mann amnesia effect (https://en.wikipedia.org/wiki/Gell-Mann_amnesia_effect)If you enjoy the show, share it with your colleagues, subscribe, and leave us a review! Got thoughts or questions? Reach out at rays.and.waves.podcast@gmail.comIntro music is Good Vibe by Twisterium. Thanks for the great tunes!

In this episode, we sit down with Erwin De Baetselier, the CEO of Luceda, a company at the forefront of software innovation for Photonic Integrated Circuits (PICs). As PICs continue to reshape the landscape of optical systems—from data centers to quantum labs—the tools used to design and simulate them are becoming just as critical as the hardware itself.Luceda’s software empowers engineers and researchers to model, optimize, and scale photonic designs with precision and speed. We dive into how their platform bridges the gap between photonic theory and manufacturable reality, and why design automation is key to unlocking the full potential of integrated photonics.Whether you're deep in the weeds of waveguide layouts or just curious about the future of chip-scale optics, this conversation offers a behind-the-scenes look at the software driving the PIC revolution. Join Steven and Daniel as they explore the intersection of photonics and design automation with Luceda’s visionary leader.If you enjoy the show, share it with your colleagues, subscribe, and leave us a review! Got thoughts or questions? Reach out at rays.and.waves.podcast@gmail.comIntro music is Good Vibe by Twisterium. Thanks for the great tunes!

In the last episode of Rays and Waves about linear optical quantum computers we discussed how using photons as qubits is good in many ways. However, the biggest hurdle is that photons don’t like interacting with each other, which makes the critical two-qubit gates difficult to create. But a 2001 discovery showed it was in fact possible to effectively make two-qubit interactions and therefore a full quantum computer solely with linear optical elements, single photon sources and detectors. This discovery catalysed a wealth of research into optical quantum computers which in aggregate has today made it a viable contender to a path to scalable fault tolerant quantum computers.The scheme that opened the floodgates for optical quantum computers is referred to as the KLM protocol after its originators Knill, Laflamme, and Milburn.For this episode we have the honour of talking to said Milburn on the Rays and Waves podcast!If you like the show, tell your friends and colleagues about it! And like, subscribe, and all that! If you want to get in touch, shoot us an email on rays.and.waves.podcast@gmail.comStuff mentioned in the episode:- Looking Glass Universe video about Quantum Eraser: https://www.youtube.com/watch?v=sAm7iVdAvTA&t=1154s- Ezra Klein interview about AGI: https://youtu.be/Btos-LEYQ30?feature=sharedIntro music is Good Vibe by Twisterium. Thanks for making sweet music!Outro music is Slowly Comes The Angels by fermionik

In this episode of Rays and Waves we speak to Katsumoto Ikeda. Kats runs a brilliant webpage about optical design called “A Pencil of Rays” (https://www.pencilofrays.com/). He has worked as an optical designer for well over a decade. and is now the Application Engineer Manager at Ansys in Japan. Join Daniel, Steven, and Kats in a riveting conversation about optical design.If you like the show, tell your friends about it! And like, subscribe, and all that! If you want to get in touch, shoot us an email on rays.and.waves.podcast@gmail.comIntro music is Good Vibe by Twisterium. Thanks for making sweet music!

In this episode of Rays and Waves we get to know the podcast purpose and the hosts a bit. Join Daniel and Steve in the episodes to come as they explore the vast world of optics. If you like the show, tell your friends about it! And like, subscribe, and all that! If you want to get in touch, shoot us an email on rays.and.waves.podcast@gmail.com Intro music is Good Vibe by Twisterium. Thanks for making sweet music!

In this episode of Rays and Waves we speak about Optical Communication. Join Daniel and Steve as they explore how information transfer through hair-thin glass fibres are changing the world. While data rates have grown by over 10 billion times since the first commercial systems we are still signalling the fall of Troy with fire beacons by blinking lights on and off, only mind-numbingly fast! If you like the show, tell your friends about it! And like, subscribe, and all that! If you want to get in touch, shoot us an email on rays.and.waves.podcast@gmail.com Intro music is Good Vibe by Twisterium. Thanks for making sweet music!