01 / FOUNDATION
What is photonics?
Photonics is the science and engineering of light. It includes technologies for generating, controlling, transmitting, and detecting light. Photonics is already important in telecommunications, imaging, precision measurement, and sensing.
Further reading: Optica — What is Optics? · IUPAC Gold Book — Photonics
02 / INFORMATION
What is optical computing?
Optical computing is a broad family of approaches that use light to perform information-processing operations. It is not one particular device architecture: different research approaches use light in different ways, sometimes alongside conventional electronics.
Further reading: Nature Reviews Physics — The physics of optical computing (2023) · IEEE — Optical computing
03 / POTENTIAL
Why investigate light for computation?
Light can carry large amounts of information, and optical systems can support forms of parallel processing. These properties motivate scientific investigation. But the speed of light alone does not guarantee faster or more efficient computing: practical performance depends on the entire system.
Further reading: Nature Reviews Physics — The physics of optical computing (2023)
04 / DISTINCTION
Is optical computing quantum computing?
Not necessarily. Optical computing can operate according to classical physics. Quantum computing instead processes quantum information encoded in qubits. Photons can be used for quantum information, but simply using light does not make a computer quantum.
Further reading: NIST — Quantum Computing Explained
05 / EVIDENCE
Does photonic computing guarantee an advantage?
No. Potential benefits must be weighed against challenges such as signal conversion, optical loss, precision, and the costs of controlling a complete device. A meaningful speed or energy comparison includes the whole system, not just an isolated operation.
Further reading: Nature Reviews Physics — The physics of optical computing (2023) · National Science Review — Prospects of photonic computing for artificial intelligence (2026)