Ren was invited by Igor Aharonovich to contribute to the ‘Emerging Leaders 2022’ collection in JOPT.

Ren was invited by Piccardo Marco and Vincent Ginis to contribute to a Roadmap paper in JOPT.

Ren was invited by Dennis Couwenberg to contribute to a Review article in Nanophotonics.

Ren was invited by Lei Zhou, Ding Ping Tsai, and Xiangping Li to contribute to a Speical Issue – “Metasurface 2.0” in Chinese Optics.

Ren was invited by Sergey I. Bozhevolnyi and Fei Ding to contribute to a Special Issue – “Plasmonic Metasurfaces” in Photonics.

Stefan Maier was invited by Sir John Pendry, Nader Engheta and Ventsislav Valevand to contribute to a Special Issue “Photonic Nanomaterials” in Advanced Materials. Ren made a contribution in writing.

Stefan Maier and Emiliano Cortes were invited by the Chemical Reviews on “Metasurfaces for energy conversion”, Ren made a contribution in writing.