White light Z-scan measurements of ultrafast optical nonlinearity in reduced graphene oxide nanosheets in the 400-700 nm region

被引：309

作者：

Perumbilavil, Sreekanth ^{[1
]}

Sankar, Pranitha ^{[1
]}

Rose, T. Priya ^{[1
]}

Philip, Reji ^{[1
]}

机构：

[1] Raman Res Inst, Light & Matter Phys Grp, Ultrafast & Nonlinear Opt Lab, Bangalore 560080, Karnataka, India

来源：

APPLIED PHYSICS LETTERS | 2015年 / 107卷 / 05期

关键词：

CONTINUUM Z-SCAN; ABSORPTION; GRAPHITE; COMPOSITES; GENERATION; REDUCTION; POLYMER; PULSES;

D O I：

10.1063/1.4928124

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Wavelength dispersion of optical power limiting is an important factor to be considered while designing potential optical limiters for laser safety applications. We report the observation of broadband, ultrafast optical limiting in reduced graphene oxide (rGO), measured by a single open aperture Z-scan using a white light continuum (WLC) source. WLC Z-scan is fast when the nonlinearity is to be measured over broad wavelength ranges, and it obviates the need for an ultrafast tunable laser making it cost-economic compared to conventional Z-scan. The nonlinearity arises from nondegenerate two-photon absorption, owing mostly to the crystallinity and extended pi conjugation of rGO. (C) 2015 AIP Publishing LLC.

引用

页数：5

共 45 条

[1] OBSERVATION OF SELF-PHASE MODULATION AND SMALL-SCALE FILAMENTS IN CRYSTALS AND GLASSES [J].