Kejie Fang

For more information

• Fang research group

Education

• Ph.D. Physics, Stanford University, 2013

Research Statement

Research in Fang group focuses on study of light-matter interactions and light manipulation at micro- and nano-scales. Guided by exploratory theories, research emphasis is given to device demonstrations and multi-scale integrations for applications in photonic quantum information processing and quantum metrology.

Post-Doctoral Research Opportunities

Our group has a postdoc position opening with a preference of experience in experimental quantum optics or optomechanics. Our research is backed by state-of-the-art fabrication facilities including the first and only 150 keV EBL in North America and quantum experiment equipment including dilution refrigerators.

Graduate Research Opportunities

We welcome highly motivated students to join our group. Our research intersects with several fields of science and engineering including quantum optics, nanophotonics, and NEMS, and offers rich opportunities for graduate researchers to be trained in device physics, fabrication, and measurements. Incoming or interested students should contact Prof. Fang (kfang3@illinois.edu) with a complete CV, accompanied by a short paragraph highlighting relevant practical experience and coursework.

Undergraduate Research Opportunities

We welcome undergraduate students interested in photonics to gain research experience in our group. Students should have preliminary course study in electromagnetism, photonics, etc.

Research Interests

• Quantum photonics
• Optomechanics
• Nanophotonics

Research Topics

• Micro & nanoelectromechanical M/NEMS integrated systems
• Quantum optics, cryptography, information, and computing

Selected Articles in Journals

• Y. Wang and K. Fang, Continuous-variable graph states for quantum metrology, Phys. Rev. A 102, 052601 (2020).
• H. Tong, S. Liu, M. Zhao, and K. Fang, Observation of phonon trapping in the continuum with topological charges, Nature Communications 11, 5216 (2020).
• M. Zhao, W. Kusolthossakul, and K. Fang, High-efficiency fiber-to-chip interface for aluminum nitride quantum photonics, OSA Continuum 3, 952-960 (2020).
• K. Fang and Y. Wang, Anomalous quantum Hall effect of light in Bloch-wave modulated photonic crystals, Phys. Rev. Lett. 122, 233904 (2019).
• M. Zhao and K. Fang, Mechanical bound states in the continuum for macroscopic optomechanics, Opt. Express 27, 10138-10151 (2019).
• K. Fang, J. Luo, A. Metelmann, M. H. Matheny, F. Marquardt, A. A. Clerk, and O. Painter, “Generalized nonreciprocity in an optomechanical circuit via synthetic magnetism and reservoir engineering”, Nature Physics 13, 465–471 (2017).
• K. Fang, M. H. Matheny, X. Luan, and O. Painter, “Optical transduction and routing of microwave phonons in cavity-optomechanical circuits”, Nature Photonics 10, 489-496 (2016).
• L.D. Tzuang, K. Fang, P. Nussenzveig, S. Fan, and M. Lipson, “Nonreciprocal phase shift induced by an effective magnetic flux for light”, Nature Photonics 8, 701 (2014).
• E. Li, B. Eggleton, K. Fang, and S. Fan, “Photonic Aharonov–Bohm effect in photon–phonon interactions”, Nature Communications 5: 3225 (2014).
• K. Fang, V. M. Acosta, C. Santori, Z. Huang, K. M. Itoh, H. Watanabi, S. Shikata, and R. G. Beausoleil, "High-sensitivity magnetometry based on quantum beats in diamond nitrogen-vacancy centers", Physical Review Letters 110, 130802 (2013).
• K. Fang and S. Fan, "Controlling the flow of light using inhomogeneous effective gauge field that emerges from dynamic modulation", Physical Review Letters 111, 203901 (2013).
• K. Fang, Z. Yu, and S. Fan, “Realizing effective magnetic field for photons by controlling the phase of dynamic modulation”, Nature Photonics 6, 782-787 (2012).
• K. Fang, Z. Yu, and S. Fan, “Photonic Aharonov-Bohm effect based on dynamic modulation", Physical Review Letters 108 153901 (2012).

Honors

• NSF CAREER (2020)

Recent Courses Taught

• ECE 110 - Introduction to Electronics
• ECE 487 - Intro Quantum Electr for EEs
• ECE 498 KF (ECE 498 KF3, ECE 498 KF4) - Quantum Optics & Devices