| Title | An actively ultrafast tunable giant slow-light effect in ultrathin nonlinear metasurfaces |
| Authors | Lu, Cuicui Hu, Xiaoyong Shi, Kebin Hu, Qin Zhu, Rui Yang, Hong Gong, Qihuang |
| Affiliation | Peking Univ, State Key Lab Mesoscop Phys, Beijing 100871, Peoples R China. Peking Univ, Dept Phys, Beijing 100871, Peoples R China. Collaborat Innovat Ctr Quantum Matter, Beijing 100871, Peoples R China. |
| Keywords | graphene metamaterial-induced transparency metasurfaces slow light effect Zno nanoparticles ELECTROMAGNETICALLY INDUCED TRANSPARENCY PLASMON-INDUCED TRANSPARENCY Z-SCAN MEASUREMENT BROAD-BAND NANOPARTICLES METAMATERIAL DISPERSION HYBRID |
| Issue Date | 2015 |
| Publisher | LIGHT-SCIENCE & APPLICATIONS |
| Citation | LIGHT-SCIENCE & APPLICATIONS.2015,4. |
| Abstract | A slow-light effect based on metamaterial-induced transparency (MIT) possesses great practical applications for integrated photonic devices. However, to date, only very weak slow-light effects have been obtained in metamaterials because of the intrinsic loss of metal. Moreover, no active control of slow-light has been achieved in metamaterials. Here, we report the realization of a giant slow-light effect on an ultrathin metasurface that consists of periodic arrays of gold nanoprism dimers with a thickness of 40 nm sandwiched between a multilayer-graphene micro-sheet/zinc oxide nanoparticle layer and a monolayer graphene/polycrystalline indium tin oxide layer. The strong field confinement of the plasmonic modes associated with the MIT ensures a tremendous reduction in the group velocity around the transparency window. A group index of more than 4 x 10(3) is achieved, which is one order of magnitude greater than that of previous reports. A large tunable wavelength range of 120 nm is achieved around the center of the transparency window when the pump light intensity is only 1.5 kW cm(-2). The response time is as fast as 42.3 ps. These results demonstrate the potential for the realization of various functional integrated photonic devices based on metasurfaces, such as all-optical buffers and all-optical switches. |
| URI | http://hdl.handle.net/20.500.11897/419667 |
| ISSN | 2047-7538 |
| DOI | 10.1038/lsa.2015.75 |
| Indexed | SCI(E) EI 中国科学引文数据库(CSCD) |
| Appears in Collections: | 人工微结构和介观物理国家重点实验室 |
