Kyung Hee University Achieves Breakthrough in Quantum Device Technology
Seoul, Monday, 21 April 2025.
Kyung Hee University’s team has achieved a world-first by demonstrating the Circular Photogalvanic Effect in two-dimensional semimetals, marking a significant advance in quantum electronics.
Understanding the Circular Photogalvanic Effect
The Circular Photogalvanic Effect (CPGE) in semimetals is an intricate phenomenon where the direction of circularly polarized light induces a corresponding change in the flow of electric current. This effect is a manifestation of the unique quantum properties of Weyl semimetals, characterized by massless electrons that are highly responsive to changes in magnetic field strength and orientation [1]. The Kyung Hee University team, led by Professor Choi Seok-ho’s team, has successfully demonstrated this effect in two-dimensional (2D) semimetals, a feat never accomplished before [1].
Significance and Implications of the Breakthrough
The demonstration of CPGE in 2D semimetals is a pivotal moment for the industry, primarily because it expands the potential applications of quantum devices. The advancement allows for the development of more compact and efficient electronic devices, which are essential in quantum computing and advanced energy conversion systems [1][4]. The 2D structure offers flexibility and reduced size, which are vital characteristics for the next generation of device miniaturization and integration [4].
Research and Development Collaboration
This significant discovery was a collaborative effort supported by the Korean Ministry of Science and ICT and the National Research Foundation of Korea [2]. The research, which involved both domestic and international partners, underscores the global effort to understand and manipulate quantum phenomena. Institutions like Ulsan National Institute of Science and Technology, Australian National University, and Wollongong University in Australia were instrumental in the project’s success [1][2].
Future Prospects for Quantum Devices
Looking ahead, the breakthrough sets the stage for advancements in high-performance energy harvesting devices and optoelectronic components [1]. The ability to control electron flow using light direction opens new horizons in quantum information processing and spintronic devices, vital for future technological innovations [2]. The findings published in ‘Materials Today Physics’ highlight the strategic importance of international cooperation in advancing fundamental and applied quantum research [1][2].