Fang Research Group

Research in Fang group focuses on study of light and light-matter interactions at chip-scale, with an emphasis on developing photonic devices for applications in classical and quantum information processing, sensing, and networking. Our lab is involved in major interdisciplinary initiatives, including the Illinois Quantum Information Science and Technology Center (IQUIST), NSF Quantum Leap Challenge Institute HQAN, and DOE National Quantum Information Science Research Center Q-NEXT.

Current research includes:

• Quantum photonics

Optical nonlinearities are essential for classical and quantum information technologies. We develop photonic integrated circuits using materials with substantial nonlinearities to enable key resources and protocols for classical and quantum applications.

Entangled photon source

Quantum frequency conversion

Nonlinear BSM-assisted quantum networking

• Optomechanics

Control of phonons–quanta of vibrations–in engineered structures using radiation-pressure force represents an emerging quantum technique for sensing and information transduction. We develop chipscale optomechanical architectures, for example based on mechanical bound states in the continuum, to enable novel sensing modalities and quantum phenomena.

Mechanical bound states in the continuum

• Quantum devices

Phonons can couple with disparate physical systems, leading to hybrid quantum platforms that combine the advantage of individual components. With our collaborators, we are developing architectures and techniques to couple mechanical devices with superconducting qubits.