Archer and EPFL co-develop a single chip integrated p-ESR microsystem

Archer and EPFL Co-Develop a Single Chip Integrated Pulsed Electron Spin Resonance Microsystem (Illustrative image from Freepik)
Archer and EPFL Co-Develop a Single Chip Integrated Pulsed Electron Spin Resonance Microsystem (Illustrative image from Freepik)

Archer Materials Limited, a semiconductor company advancing the quantum technology and medical diagnostics industries, has built a single chip integrated pulsed electron spin resonance (“p-ESR”) microsystem, with its research partner École Polytechnique Fédérale de Lausanne (“EPFL”) in Switzerland.

Archer and EPFL intend to use the p-ESR microsystem to perform complex measurements involving the potential electron spin manipulation of Archer’s 12CQ quantum materials. The measurements will be ongoing throughout CY2024. The miniaturisation and electron spin sensitivity of the p-ESR microsystem also allows Archer to explore opportunities in developing quantum sensors, advanced spectrometers, and analytical devices.

The p-ESR microsystem is a tiny, integrated device designed to detect and analyse the behaviour of unpaired electrons, that potentially carry spin quantum information, in materials at a very small scale. It measures 0.7 mm2 in size and it includes integrated circuit components like micro coils, amplifiers, filters, and mixers, all working together to detect and amplify signals related to the behaviour of unpaired electrons. Significant innovation is required to design, develop, and build an operational p-ESR microsystem.

The p-ESR chip is manufactured using a 130 nm SiGe BiCMOS technology (IHP SG13G2Cu). This follows research and development by Archer and EPFL on detecting electron spins in its quantum materials using continuous wave ESR (“cw-ESR”) chips built with high electron mobility transistor (“HEMT”) and complementary metal-oxide semiconductor (“CMOS”) technology (ASX ann. 10 Oct 2022, 1 Feb 2022, and 20 Apr 2023). The new p-ESR chip technology is a significant advance over the HEMT and CMOS chips in both design and functionality.

Archer and EPFL

The technical details of the design, characterisation, and operation of the p-ESR chip will be made publicly available as a pre-print scientific article in an open-access repository this week.

Commenting on the development of the p-ESR chip, Dr Mohammad Choucair, CEO of Archer, said, “The engineering of a new pulsed ESR chip is a noteworthy achievement by the teams at Archer and EPFL. It is a valuable tool to advance Archer’s 12CQ chip project, and it opens a potential pathway toward precision sensing in integrated and portable electronic devices. Built on 130 nm SiGe BiCMOS technology, the p-ESR chip represents Archer’s commitment to advanced semiconductor development. Archer is continuing to work with EPFL to build significant capability in radiofrequency devices and circuit design, which lay the groundwork to further develop radiofrequency circuits for potential applications in quantum technology. The p-ESR microsystem capabilities are an integral part of Archer’s technology development and research in quantum materials and related technologies.”


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