The primary objects of study are nonreciprocal polaritons, which are particle-like excitations of light and matter which strongly couple to incident light and develop non-trivial energy-momentum dispersions. These polaritons have unique properties which are important prerequisite conditions to establish low-loss optical communication in an on-chip solid-state platform. Mengkun Liu’s research group developed the world’s first scattering-type magneto-infrared near-field nanoscopy. They plan to use these magneto nanoscopes to study nonreciprocal polariton wave propagation in Dirac and Weyl materials.
Dr. Liu’s research can provide a comprehensive understanding of nonreciprocal polaritonic behavior in low-dimensional materials, which has the potential to greatly advance the field of nanophotonics and open new opportunities for the development of novel photonic devices with unprecedented functionalities. His magneto near-field nanoscopes has already started to revolutionize the field of nano-optics by enabling the visualization of nanoscale polaritons in a magnetic field using a closed-cycle system, a scientific breakthrough that was previously unattainable.
Experimental Physics Investigators Initiative
Stony Brook University, Department of Physics & Astronomy