Broadband dispersive free, large, and ultrafast nonlinear material platforms for photonics
| Autor: | Xinxiang Niu, Hong Yang, Qihuang Gong, Cuicui Lu, Yan Sheng, Xiaoyong Hu |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Materials science
epsilon-near-zero photonics all-optical tunability QC1-999 Physics::Optics Nanotechnology 02 engineering and technology 01 natural sciences Nanomaterials 0103 physical sciences Broadband nonlinear metasurfaces Electrical and Electronic Engineering 010306 general physics business.industry Physics ultrafast photonics 021001 nanoscience & nanotechnology Atomic and Molecular Physics and Optics Electronic Optical and Magnetic Materials Nonlinear system broadband dispersion free nonlinear materials Photonics 0210 nano-technology business Ultrashort pulse Biotechnology |
| Zdroj: | Nanophotonics, Vol 9, Iss 15, Pp 4609-4618 (2020) |
| ISSN: | 2192-8614 2192-8606 |
| Popis: | Broadband dispersion free, large and ultrafast nonlinear material platforms comprise the essential foundation for the study of nonlinear optics, integrated optics, intense field optical physics, and quantum optics. Despite substantial research efforts, such material platforms have not been established up to now because of intrinsic contradictions between large nonlinear optical coefficient, broad operating bandwidth, and ultrafast response time. In this work, a broadband dispersion free, large and ultrafast nonlinear material platform based on broadband epsilon-near-zero (ENZ) material is experimentally demonstrated, which is designed through a novel physical mechanism of combining structural dispersion and material dispersion. The broadband ENZ material is constructed of periodically nanostructured indium tin oxide (ITO) films, and the structure is designed with the help of theoretical predictions combined with algorithm optimization. Within the whole broad ENZ wavelength range (from 1300 to 1500 nm), a wavelength-independent and large average nonlinear refractive index of −4.85 × 10−11 cm2/W, which is enlarged by around 20 times than that of an unstructured ITO film at its single ENZ wavelength, and an ultrafast response speed at the scale of Tbit/s are experimentally reached simultaneously. This work not only provides a new approach for constructing nonlinear optical materials but also lays the material foundation for the application of nanophotonics. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|