Ultrafast optical nonlinearity of multi-layered graphene synthesized by the interface growth process

Title
Ultrafast optical nonlinearity of multi-layered graphene synthesized by the interface growth process
Authors
김원준장유민이준수강동석이주한송용원
Keywords
graphene; nonlinearity; optical fiber; mode-locked laser; saturable absorber
Issue Date
2012-05
Publisher
Nanotechnology
Citation
VOL 23, NO 22, 225706-1-225706-5
Abstract
We propose a novel photonic application as well as an optical tool to verify the crystallinity of interface-grown graphene demonstrating passive mode-locked lasers. The interface growth process enables the formation of multi-layered graphene at an interface of substrate and catalyst, therefore directly onto the targeted substrate without a transfer process. The synthesized graphene is characterized using Raman spectroscopy and x-ray photoelectron spectroscopy before ultrashort pulse formation to confirm the validity of the process for high-speed photonic applications of graphene. The resultant pulses have a repetition rate, pulse duration, RF extinction ratio of 14.01 MHz, 1.0 ps, and ~35 dB, respectively.
URI
http://pubs.kist.re.kr/handle/201004/42377
ISSN
09574484
Appears in Collections:
KIST Publication > Article
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