chengwei qiu

Metasurfaces for Vortex Generation, Multiplexing and Laser

Interfacial engineering via the artificially constructed structures of ultrathin thickness compared to the wavelength has enabled a plethora of advanced manipulations of light-matter interactions. I will report some of the most recent developments in my group as well as in the field of the interfacial engineering of manipulation of light-matter interactions, via the artificially nanostructured metasurfaces. Amongst various applications of metasurfaces, I will focus on how to design vortex metasurfaces1 to generate and multiplex orbital angular momentums (OAMs), with other degrees of freedom of light such as polarization and frequency. Furthermore, we will show some more recent and exciting results about high-purity orbital angular momentum lasing by synergize the metasurfaces and cavities. It may provide an alternative paradigm toward an extremely compact and multifunctional nanodevices resorting to the OAM states of the light. The multiplexing and hybridization of OAM states with other properties of light open up new opportunities for the advanced flat-profile optics.

Cheng-Wei QIU received his B.Eng. (USTC) and Ph. D. (NUS) degree in 2003 and 2007, respectively. He was a Postdoctoral Fellow at Physics Department in MIT till the end of 2009. Since December 2009, he joined NUS as an Assistant Professor and was promoted to Associate Professor with tenure in Jan 2017. From 1st Jan 2018, he was promoted to Dean’s Chair Professor in Faculty of Engineering, NUS. He was the recipient of the SUMMA Graduate Fellowship in Advanced Electromagnetics in 2005, IEEE AP-S Graduate Research Award in 2006, URSI Young Scientist Award in 2008, NUS Young Investigator Award in 2011, MIT TR35@Singapore Award in 2012, Young Scientist Award by Singapore National Academy of Science in 2013, Faculty Young Research Award 2013 in NUS, SPIE Rising Researcher Award 2018, Young Engineering Research Award 2018, and Engineering Researcher Award 2021 in NUS. His research is known for the structured light for beam manipulation and nanoparticle manipulation. He has published over 300 peer-reviewed journal papers. He was Highly Cited Researchers in 2019 and 2020 by Web of Science. He has been serving in Associate Editor for various journals such as PhotoniX, Photonics Research, and Editor-in-Chief for eLight. He also serves in Editorial Advisory Board for Laser and Photonics Review, Advanced Optical Materials, and ACS Photonics.