New Room Temperature Photon Source for Quantum Tech in Korea

This new photon source works without needing to be very cold, unlike older ones that needed special cooling. It is now ready for use in real quantum devices.
By Newsroom | Science, Technology |

The Korea Research Institute of Standards and Science (KRISS) has announced the development of a single-photon source capable of operating at room temperature, housed within a compact, 19-inch rack-mounted unit. This device generates light particles, or photons, one at a time, and is designed for immediate operation upon powering up, eliminating the need for cryogenic cooling. This advancement is positioned as a foundational element for a range of quantum technologies, including communication, sensing, and measurement systems. The technology is built on gallium nitride (GaN) semiconductor principles and is presented as a move away from purely laboratory-based setups toward more accessible, on-site applications. The work has been published in the journal Laser & Photonics Reviews.

Toward Commercialization and Domestic Supply

The KRISS development is being actively pursued for commercialization through a collaboration with QURAD, a company that originated from KRISS. This venture aims to refine the technology into smaller, more resilient products and establish a domestic supply chain for quantum light sources. The device itself is engineered for easy integration with existing quantum cryptographic communication equipment, operating on a standard 220-volt power supply. It incorporates essential components such as a high-magnification lens for isolating single photons, filters to suppress unwanted light, and a precision coupling mechanism to direct photons into optical fibers.

Context: Quantum Technology Foundations

A single-photon source is fundamental to the operation of many quantum technologies. Its ability to emit photons individually is critical for applications requiring precise control over quantum states. Traditionally, such sources have required specialized, often cumbersome, cooling systems to achieve the necessary performance. The development of a room-temperature, "plug-and-play" solution suggests a pathway to simplifying the deployment and accessibility of these nascent technologies. This specific advancement also marks an instance of domestic localization in the quantum sector, utilizing homegrown technologies for a key component. KRISS also operates what is described as Korea's sole comprehensive platform for quantum light, integrating source quality verification with ongoing development.

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Frequently Asked Questions

Q: What new technology did the Korea Research Institute of Standards and Science (KRISS) develop?
KRISS has created a new source that makes single light particles, called photons, at normal room temperature. It is in a small, easy-to-use machine.
Q: Why is this new photon source important for quantum technology?
This device is important because it works without needing special cooling, making quantum communication, sensing, and measurement easier to use in real life, not just in labs.
Q: How will this new technology be used in the future?
The technology is being made ready for sale by a company called QURAD. They want to make it smaller and stronger and create a supply in Korea for these quantum light sources.
Q: What makes this photon source different from older ones?
Older single-photon sources needed very cold temperatures and big cooling systems. This new one works at room temperature and is designed to be plugged in and used right away, like a normal computer.