2D TMDC monolayers demonstrate strong excitonic absorption and nonlinear optical responses, making them ideal platforms for radiative engineering in optical devices. The strong nonlinear optical response and atomically thin structure of 2D materials make them ideal platforms for broad frequency conversion and for exploring strong field induced phenomena with ultrafast optical pulses. We have been central to several recent collaborative efforts achieving on-chip manipulation of coherent light-matter interactions in 2D TMDC monolayers through innovative material, photonic and plasmonic designs. These collaborative thrusts are focused on radiative engineering for additional 2D nanostructures, aiming to facilitate high-efficiency, scalable on-chip ultrathin quantum photonic networks for future information device applications. Our ongoing and future efforts aim to explore strong-field, nonequilibrium dynamics across a broader class of low-dimensional quantum materials and artificial heterostructures. Combined with tailored light–matter interactions via photonic and plasmonic platforms, we seek to realize ultrastrong coupling regimes and to engineer novel Floquet quantum phases with controlled symmetries on ultrafast timescales.
All of research directions above—spanning scalable synthesis, ultrafast dynamics, and radiative engineering across a hierarchy of confinement geometries— form an integrated program that will provide revolutionary new insight that will push the field of low dimensional materials beyond current understanding. Our discoveries will pave the way for future advances in nanoscale quantum devices and optoelectronics applications.
Selected Publications
· Mueller, N. S., Arul, R., Kang, G., Saunders, A. P., Johnson, A. C., S´anchez-Iglesias, A., Hu, S., Jakob, L. A., Bar-David, J., Nijs, B., Liz-Marz´an, L. M., Liu, F., and Baumberg, J. J. Photoluminescence upconversion in monolayer wse2 activated by plasmonic cavities through resonant excitation of dark excitons. Nat. Comm. 14(1), 5726 (2023).
· Li, Q., Song, J.-H., Xu, F., Groep, J., Hong, J., Daus, A., Lee, Y. J., Johnson, A. C., Pop, E., Liu, F., and Brongersma, M. L. A purcell-enabled monolayer semiconductor free-space optical modulator. Nature Photonics 17(10), 897–903 (2023).
· Heide, C., Kobayashi, Y., Johnson, A. C., Heinz, T. F., Reis, D. A., Liu,F. , and Ghimire, S. High-harmonic generation from artificially stacked 2d crystals. Nanophotonics 12(2), 255–261 (2023).
