We have recently studied the physics and functionalities of metasurfaces in both reflective and transmissive geometries, with passive and actively tunable functionalities. In the first part, we first present a complete phase diagram to understand/predict the diversified and fascinating functionalities of metasurfaces in metal-insulator-metal (MIM) configuration , based on which we combined graphene with metasurface to achieve wide-range active THz phase modulation . We next describe our recent efforts to realize tunable metasurfaces in the microwave regime to realize dynamically-controllable functionalities . In the second part, we will describe our recent efforts to realize surface-plasmon-polariton (SPP) meta-couplers with very high efficiencies, based on gradient metasurfaces . Finally, we show that 100%-efficiency photonic spin-Hall effect (PSHE) can be realized in geometric-phase metasurfaces with meta-atoms satisfying certain criterions, which help us design microwave metasurfaces exhibiting nearly 100% PSHE efficiency in both reflection and transmission geometries .
 C. Qu et al., Phys. Rev. Lett. 115, 235503 (2015)
 Z. Q. Miao et al., Phys. Rev. X 5, 041027 (2015).
 H. X. Xu et al., Sci. Rep. 6 27503 (2016); Sci. Rep. 6 38255 (2016);
Appl. Phys. Lett. 109, 193506 (2016)
 W. J. Sun et al., Light: Science & Applications 5, 16003 (2016).
 W. J. Luo et al., Adv. Opt. Mater. 3, 1102 (2015); Phys. Rev. Appl. (2017).
Lei Zhou, Qiong He, and Shulin Sun, "High-efficiency and tunable metasurfaces in reflective and transmissive geometries (Conference Presentation)," Proc. SPIE 10536, Smart Photonic and Optoelectronic Integrated Circuits XX, 1053609 (Presented at SPIE OPTO: January 29, 2018; Published: 14 March 2018); https://doi.org/10.1117/12.2293360.5751507503001.
Conference Presentations are recordings of oral presentations given at SPIE conferences and published as part of the proceedings. They include the speaker's narration with video of the slides and animations. Most include full-text papers. Interactive, searchable transcripts and closed captioning are now available for 2018 presentations, with transcripts for prior recordings added daily.
Search our growing collection of more than 16,000 conference presentations, including many plenaries and keynotes.