Ever wonder why your phone gets hot when you play a game for too long?
That heat is a clue to one of the biggest challenges in tech, and one possible fix is something you see every day: light.
The Problem: Electrons Make Heat
Every computer chip is packed with billions of tiny switches. Electricity (moving electrons) flips those switches on and off to process information. But electrons create heat as they move through chips and wires.
As we ask computers to do more, from AI to streaming to gaming, the heat and energy needs keep climbing.
The Idea: Use Photons Instead
Photonic computing uses photons, the particles that make up light, to move and process information. Here’s why that’s exciting:
- Speed: Light is the fastest thing in the universe.
- Cooler running: Light-based systems can make far less heat than electronic ones, which means less wasted energy.
- Teamwork: Different colors (wavelengths) of light can carry different data through the same fiber at the same time. Many of those colors are infrared, which our eyes can’t see.
Wait, Isn’t This Already Happening?
Kind of! Fiber optic internet already moves data as light over long distances. The new frontier is bringing light inside the computer, onto the chip itself.
Real Chips, Real Research
This isn’t just science fiction. Researchers at MIT demonstrated a photonic chip that performs all the key computations of a deep neural network using light. The chip combines optics and electronics, so the future may be light and electricity working together.
Who Builds This Stuff?
People from many fields, including physics, engineering, and computer science. You don’t have to know exactly which path is yours yet. You just have to start exploring.
At iUrban Teen, we have inspired tech programs designed to get you on the road to a successful tech career. Curious about how things work? Love solving problems? Come explore with us.
The future runs on light. Let’s help you shine. 
Sources
- MIT News, “Photonic processor could enable ultrafast AI computations with extreme energy efficiency” (Dec. 2024): https://news.mit.edu/2024/phot
onic-processor-could-enable- ultrafast-ai-computations-1202 - Light Reading, “Wavelength Division Multiplexing (WDM)”: https://www.lightreading.com/b
usiness-management/wavelength- division-multiplexing-wdm- - University of the People, “Light-Based Computing: Is the Future Already Here?”: https://www.uopeople.edu/blog/
what-is-light-based-computing/