Research Overview

Hybrid magnonics studies the interaction and integration of magnonics with other degrees of freedom. Magnonic devices made of magnet materials such as  magnetic insulator yttrium iron garnet (YIG) are highly compatible with other device platforms because of their low losses for different information carriers. This allows multiple forms of signals coexisting on a single device platform and interact with one another. Different types of  hybrid magnonic systems can be realized when magnons are hybridized with microwave, light, acoustic, and mm/THz waves, corresponding to electromagnonics, optomagnonics, magnomechanics, and THz magnonics, respectively. The goal of hybrid magnonics is to discover new types of interactions, and boost known interactions to allow information flow among different forms with high fidelity. On-chip device integration is one powerful approach for enhancing the interactions, considering the short wavelengths for most of the signals involved. In the meantime, an integrated device is also preferred when interfacing with other integrated device platforms. Our research will reveal the underlying physical mechanisms and boost the effects via device engineering, aiming at building a  comprehensive integrated chip for magnon-enabled coherent information processing in both the classical and quantum regimes. 

Hybrid Magnonics

Hybrid magnonics integrates microwave, photonic, and acoustic devices with  magnonic devices, or directly makes these devices using magnetic materials that support magnon excitations. Through sophisticated device design and engineering, we aim at enhancing the interactions between magnons and photons or phonons. By studying the hybrid modes created via such mode hybridization, we explore new physical phenomena and potential applications.

THz Magnonics

Terahertz (THz) gap refers to the frequency band in the terahertz (10^12 Hz) region of the electromagnetic spectrum between microwave and optical frequencies, where technologies are much less developed. Magnons have shown great potentials in bridging the THz gap. Our group explores new devices that either support or interact with THz signals. We are interested in novel magnon-enabled THz applications for sensing and communications.

Integrated Magnonics

Device integration is the key to developing scalable magnonic circuits. It has been a significant challenge to build integrated magnonic devices using low-loss magnetic materials such as yttrium iron garnet due to fabrication challenges. Our group focus on developing novel techniques to make integrated micro/nano-magnonic devices, and seek for their integration with other (such as photonic or superconducting) integrated devices.

Quantum Magnonics

Quantum magnonics studies the generation, manipulation and detection of quantum magnonic states. Taking advantage of the device hybridization and integration, our group works on building on-chip quantum magnonic devices. It will provide new opportunities for testing quantum mechanics on macroscopic objects, and enable novel quantum sensing and communication applications.