Mengfei WU

Dr Mengfei Wu received her Bachelor’s and Master’s degrees in Engineering from the University of Cambridge in 2012 and a PhD in Electrical Engineering from Massachusetts Institute of Technology in 2018. Her PhD work focused on solid-state photon upconversion, mediated by excitons in organic molecules and semiconductor nanocrystals. In 2019, she received a Banting Postdoctoral Fellowship and conducted research in the University of Toronto, with a focus on nanocrystal-based lasers leveraging novel photonic cavities. She has since been a principal investigator at the Institute of Materials Research and Engineering (IMRE) in Singapore, leading projects with a 2021 A*STAR Career Development Fund, 2022 MTC Young Individual Research Grant and 2022 MTC Programmatic Fund. In 2023, she joined the MSE Department at NUS as an assistant professor, on a joint appointment with IMRE.

Research Interests

Dr Mengfei Wu’s research lies at the intersection of materials science, photonics and device engineering. She seeks to understand and exploit the unique properties of excitonic materials, such as organics and colloidal nanocrystals, and to complement these materials with photonic structures. The ultimate goal is to realize novel and efficient optoelectronic devices, such as photon upconverters, light-emitting diodes and lasers.

Selected Publications:

1. M. Wu, L. Ding, R.P. Sabatini, L.K. Sagar, G. Bappi, R. Paniagua-Domínguez, E.H. Sargent, A.I. Kuznetsov. Bound state in the continuum in nanoantenna-coupled slab waveguide enables low-threshold quantum-dot lasing. Nano Lett. 21, 9754-9760 (2021).
2. M. Wu^†, T-A. Lin^†, J.O. Tiepelt, V. Bulović, M.A. Baldo. Nanocrystal-sensitized infrared-to-visible upconversion in a microcavity under subsolar flux. Nano Lett. 21, 1011-1016 (2021).
3. M. Wu^†, S.T. Ha^†, S. Shendre, E.G. Durmusoglu, W.-K. Koh, D.R. Abujetas, J.A. Sánchez-Gil, R. Paniagua-Domínguez, H.V. Demir, A.I. Kuznetsov. Room-temperature lasing in colloidal nanoplatelets via Mie-resonant bound states in the continuum. Nano Lett. 20, 6005-6011 (2020).
4. N. Geva, L. Nienhaus, M. Wu, V. Bulović, M.A. Baldo, T. Van Voorhis, M.G. Bawendi, A heterogeneous kinetics model for triplet exciton transfer in solid-state upconversion. J. Phys. Chem. Lett. 10, 3147-3152 (2019).
5. L. Nienhaus^†, M. Wu^†, V. Bulović, M.A. Baldo, M.G. Bawendi. Using lead chalcogenide nanocrystals as spin mixers: a perspective on infrared-to-visible upconversion. Dalton Trans. 47, 8509-8516 (2018).
6. L. Nienhaus, M. Wu, N. Geva, J.J. Shepherd, M.W.B. Wilson, V. Bulović, T. Van Voorhis, M.A. Baldo, M.G. Bawendi. A speed limit for triplet-exciton transfer in solid-state PbS nanocrystal-sensitized photon upconversion. ACS Nano 11, 7848–7857 (2017).
7. M. Wu, J. Jean, V. Bulović, M.A. Baldo. Interference-enhanced infrared-to-visible upconversion in solid-state thin films sensitized by colloidal nanocrystals. Appl. Phys. Lett. 110, 211101 (2017).
8. M. Wu^†, D.N. Congreve^†, M.W.B. Wilson^†, J. Jean, N. Geva, M. Welborn, T. Van Voorhis, V. Bulović, M.G. Bawendi, M.A. Baldo. Solid-state infrared-to-visible upconversion sensitized by colloidal nanocrystals. Nat. Photon. 10, 31–34 (2016).
9. N.J. Thompson^†, M.W.B. Wilson^†, D.N. Congreve^†, P.R. Brown, J.M. Scherer, T.S. Bischof, M. Wu, N. Geva, M. Welborn, T. Van Voorhis, V. Bulović, M.G. Bawendi, M.A. Baldo. Energy harvesting of non-emissive triplet excitons in tetracene by emissive PbS nanocrystals. Nat. Mater. 13, 1039–1043 (2014).

Affiliations:

• Assistant Professor at MSE, NUS
• Scientist at IMRE, A*STAR