外文题目: Ultrafast Nonlinear Excitation Dynamics of Black Phosphorus Nanosheets from Visible to Mid-Infrared
作者: Wang, Kangpeng; Szydlowska, Beata M.; Wang, Gaozhong; Zhang, Xiaoyan; Wang, Jing Jing; Magan, John J.; Zhang, Long; Coleman, Jonathan N.; Wang, Jun; Blau, Werner J.
刊名: ACS Nano
年: 2016 卷: 10 期: 7 页： 6923--6932
英文关键词:
2D nanomaterials; black phosphorus; nonlinear optics; ultrafast spectroscopy; z-scan; pump-probe; saturable absorption
MOS2 SATURABLE ABSORBERS; LIQUID EXFOLIATION; LAYERED MATERIALS; ABSORPTION; GRAPHENE; ELECTRONICS; REFRACTION; MOBILITY; PUMP
英文摘要:
The recent progress on black phosphorus makes it a promising candidate material for broadband nanophotonic devices, especially operating in the mid-infrared spectral region. Here, the excited carrier dynamics and nonlinear optical response of unoxidized black phosphorus nanosheets and their wavelength dependence were systematically studied from 800 nm to 2.1 mu m. The wavelength-dependent relaxation times of black phosphorus nanosheets are determined to be 360 fs to 1.36 ps with photon energies from 1.55 to 0.61 eV. In a comparative study with graphene, we found that black phosphorus has a faster carrier relaxation in near- and mid-infrared region. With regard to nonlinear optical absorption, the response of black phosphorus significantly increases from near- to mid-infrared, and black phosphorus is also confirmed to be better as saturable absorber to MoS2 in infrared region.


文献类型: 期刊论文
正文语种: English
收录类别: SCIEI
DOI: 10.1021/acsnano.6b02770


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