Optical nonlinearities of CVD fabricated graphene by z-scan technique

Author

Pi Ling Huang ; Wan-Lin Chen ; Ta-Wei Peng ; Chao-Yung Yeh ; Wood-Hi Cheng

Author_Institution

Dept. of Photonics, Nat. Sun Yat-sen Univ., Kaohsiung, Taiwan

fYear

2014

fDate

12-16 Oct. 2014

Firstpage

579

Lastpage

580

Abstract

Optical nonlinearities of single layer graphene were investigated by z-scan method with ps laser pulses at wavelength of 532 nm. In addition to saturable absorption, the inverse saturation absorption was also observed at a higher intensity level. The two-photon absorption coefficient ß and nonlinear refractive index n₂ are obtained as 0.17 to 5.4 (10⁵ cm/W) and 0.8 to 10 (cm²/GW) respectively, while the pulse intensity was at the range of 6.5 to 97.2 (GW/cm²).

Keywords

absorption coefficients; chemical vapour deposition; graphene; high-speed optical techniques; optical fabrication; optical materials; optical saturable absorption; refractive index; two-photon processes; C; CVD; chemical vapor deposition; inverse saturation absorption; nonlinear refractive index; optical nonlinearities; pulse intensity; saturable absorption; single layer graphene; two-photon absorption coefficient; wavelength 532 nm; z-scan technique; Fiber nonlinear optics; Graphene; Measurement by laser beam; Optical fibers; Optical pulses; Optical refraction;

fLanguage

English

Publisher

ieee

Conference_Titel

Photonics Conference (IPC), 2014 IEEE

Conference_Location

San Diego, CA

Type

conf

DOI

10.1109/IPCon.2014.6995273

Filename

6995273