Ultrafast dynamics of carriers and nonlinear refractive index in bulk polycrystalline diamond

被引：8

作者：

Zhang, Ben ^{[1
]}

Liu, Shenye ^{[1
]}

Wu, Xingzhi ^{[2
]}

Yi, Tao ^{[1
]}

Fang, Yu ^{[2
]}

Zhang, Jian ^{[1
]}

Zhong, Quanjie ^{[1
]}

Peng, Xiaoshi ^{[1
]}

Liu, Xiangming ^{[1
]}

Song, Yinglin ^{[2
]}

机构：

[1] China Acad Engn Phys, Res Ctr Laser Fus, Mianyang 621900, Peoples R China

[2] Soochow Univ, Sch Phys Sci & Technol, Suzhou 215006, Peoples R China

来源：

OPTIK | 2017年 / 130卷

基金：

中国国家自然科学基金;

关键词：

Optical nonlinear dynamics; Diamond; Free carriers; Pump-probe technique; Phase object; PUMP-PROBE SYSTEM; RAMAN LASER; NANOCRYSTALLINE DIAMOND; 2-PHOTON EXCITATION; OPTICAL-PROPERTIES; CROSS-CORRELATION; PHASE OBJECT; SPECTROSCOPY; GENERATION; ELECTRON;

D O I：

10.1016/j.ijleo.2016.11.107

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

The free-carrier dynamics and nonlinear refractive index in bulk polycrystalline diamond are investigated using a femtosecond ultraviolet-pump-optical-probe technique with a phase object. Normalized transmittances under open-aperture and closed-aperture conditions are simultaneously measured to determine the dynamics of nonlinear absorption and refraction in the sample. In the dynamics of nonlinear absorption, three processes are clearly observed: nondegenerate two-photon absorption, fast and slower decay components of the free-carrier dynamics. The lifetimes of the free carriers are precisely measured. In the dynamics of nonlinear refraction, we obtain the nonlinear refractive coefficient and find that the results obtained under the femtosecond regime differ from those of other semiconducting materials previously measured under the picosecond regime. (C) 2016 Elsevier GmbH. All rights reserved.

引用

页码：1073 / 1079

页数：7

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