Monash Builds First Single-Chip System That Generates, Routes, and Reads Light-Encoded 'Valley' Information at Room Temperature

Overview

Researchers at Monash University have built a tiny circuit that can generate, direct, and read information carried by light, all within a single chip, according to ScienceDaily. The work was published in Nature Photonics in late May 2026, as reported by Phys.org, and targets a field called valleytronics, which encodes data in a quantum property of advanced materials rather than in electrical charge.

The advance is significant because, until now, devices could either create or detect these light signals but could not do both in one integrated component. “Until now, we could generate or detect these signals, but not do everything in one integrated device. What we’ve built is a complete on-chip system that can create, route and read this information with very high precision,” said lead author Dr. Chi Li of the School of Physics and Astronomy, according to ScienceDaily.

What We Know

The light signals carry information using the “valley degree of freedom,” which The Quantum Insider describes as a quantum characteristic of materials that can be harnessed to encode and process data in entirely new ways. Valleytronics is an emerging field that could underpin faster, more energy-efficient computing and quantum technologies, The Quantum Insider reports.

To build the device, the team paired atomically thin two-dimensional materials, only a few atoms thick, with engineered nanostructures called metasurfaces, according to ScienceDaily. Rather than trying to grow the delicate materials directly on the photonic structures, the researchers stacked them together. “We employ a straightforward stacking approach to integrate ultra-thin materials with metasurfaces, overcoming the technical challenges of direct material growth on photonic structures, and enabling further advances in valleytronics,” said co-first author and Research Fellow Dr. Kaijian Xing, according to ScienceDaily.

Two features set the result apart from earlier quantum demonstrations. First, the chip operates at room temperature, which The Quantum Insider notes makes it far more practical than many quantum technologies that require extreme cooling. Second, in a demonstration of the system’s precision, the team encoded and processed two separate images simultaneously, according to Phys.org.

The paper, titled “An on-chip programmable valley optoelectronic nanocircuit,” lists Dr. Chi Li as lead author, Dr. Kaijian Xing as co-first author, and Dr. Haoran Ren as senior author, along with co-authors Professor Michael S. Fuhrer and Professor Stefan A. Maier, according to The Quantum Insider. Ren is an ARC Future Fellow and leader of the Monash NanoMeta Group, and Maier is Head of the School of Physics and Astronomy, Phys.org reports.

Why It Matters

The researchers frame the work as a step toward processing information with light instead of electricity. “This is a significant step toward scalable, chip-based technologies that use light instead of electricity to process information. Photonic devices use light to achieve massive bandwidths, ultra-fast data transmission speeds, and lower energy consumption, so what we have achieved has strong potential for applications in quantum computing, advanced imaging, and next-generation optical communication systems,” said Dr. Haoran Ren, according to ScienceDaily.

Professor Stefan A. Maier described the device as progress toward complete valleytronic systems. “This is an important step toward fully integrated valleytronic systems. By combining light and quantum materials on a chip, we can access new ways of encoding and processing information,” he said, according to ScienceDaily.

What We Don’t Know

The coverage describes the device as a laboratory demonstration rather than a manufactured product. The reachable reports do not specify the exact two-dimensional material used, the operating wavelengths, or the dimensions of the circuit, and they give no timeline for scaling the approach beyond the proof-of-concept stage. The stated applications in quantum computing, advanced imaging, and optical communication are framed by the researchers as potential rather than realized. How well the stacking method holds up when manufactured at volume, and whether the room-temperature performance is preserved at larger scales, remain open questions the published coverage does not answer.