| Title | Giant enhancement of optical nonlinearity in two-dimensional materials by multiphoton-excitation resonance energy transfer from quantum dots |
| Authors | Hong, Hao Wu, Chunchun Zhao, Zixun Zuo, Yonggang Wang, Jinhuan Liu, Can Zhang, Jin Wang, Fangfang Feng, Jiangang Shen, Huaibin Yin, Jianbo Wu, Yuchen Zhao, Yun Liu, Kehai Gao, Peng Meng, Sheng Wu, Shiwei Sun, Zhipei Liu, Kaihui Xiong, Jie |
| Affiliation | Univ Elect Sci & Technol China, State Key Lab Elect Thin Films & Integrated Devic, Chengdu, Peoples R China Peking Univ, State Key Lab Mesoscop Phys, Sch Phys, Beijing, Peoples R China Peking Univ, Frontiers Sci Ctr Nanooptoelect, Collaborat Innovat Ctr Quantum Matter, Sch Phys, Beijing, Peoples R China Chinese Acad Sci, Inst Phys, Beijing, Peoples R China Beijing Inst Technol, Sch Chem & Chem Engn, Beijing, Peoples R China Henan Univ, Minist Educ, Key Lab Special Funct Mat, Kaifeng, Peoples R China Chinese Acad Sci, Tech Inst Phys & Chem, Beijing, Peoples R China Beijing Graphene Inst BGI, Beijing, Peoples R China Chinese Acad Sci, Inst Phys, Songshan Lake Mat Lab, Dongguan, Peoples R China Peking Univ, Int Ctr Quantum Mat, Res Ctr Light Element Adv Mat, Beijing, Peoples R China Fudan Univ, State Key Lab Surface Phys, Shanghai, Peoples R China Fudan Univ, Dept Phys, Shanghai, Peoples R China Aalto Univ, Dept Elect & Nanoengn, Aalto, Finland Aalto Univ, QTF Ctr Excellence, Aalto, Finland |
| Keywords | SEMICONDUCTOR NANOCRYSTALS GRAPHENE ABSORPTION GENERATION EXCITONS SINGLE CORE |
| Issue Date | Apr-2021 |
| Publisher | NATURE PHOTONICS |
| Abstract | Colloidal quantum dots are promising photoactive materials that enable plentiful photonic and optoelectronic applications ranging from lasers, displays and photodetectors to solar cells(1-9). However, these applications mainly utilize the linear optical properties of quantum dots, and their great potential in the broad nonlinear optical regime is still waiting for full exploration(10-12). Here, we demonstrate that a simple coating of a sub-200-nm-thick quantum dot film on two-dimensional materials can significantly enhance their nonlinear optical responses (second, third and fourth harmonic generation) by more than three orders of magnitude. Systematic experimental results indicate that this enhancement is driven by a non-trivial mechanism of multiphoton-excitation resonance energy transfer, where the quantum dots directly deliver their strongly absorbed multiphoton energy to the adjacent two-dimensional materials by a remote dipole-dipole coupling. Our findings could expand the applications of quantum dots in many exciting areas beyond linear optics, such as nonlinear optical signal processing, multiphoton imaging and ultracompact nonlinear optical elements. |
| URI | http://hdl.handle.net/20.500.11897/613057 |
| ISSN | 1749-4885 |
| DOI | 10.1038/s41566-021-00801-2 |
| Indexed | SCI(E) |
| Appears in Collections: | 物理学院 人工微结构和介观物理国家重点实验室 量子材料科学中心 |
