NDLI: Nonlinear photonics in carbon nanotubes and graphenes

Content Provider	IEEE Xplore Digital Library
Author	Yamashita, S.
Copyright Year	2011
Description	Author affiliation: Dept. of Electrical Engineering and Information Systems, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, 113-8656, Japan (Yamashita, S.)
Abstract	One and two dimentional (1D and 2D) forms of nano-carbon, Carbon nanotube (CNT) and graphene, have attracted researchers' attention because of their unique electrical and photonic properties. Electrons propagating through 2D graphene have a linear dispersion relation between energy and momentum (band structure) crossing at the “Dirac point”, and thus behave as massless Dirac fermions [1]. Graphene exhibits a variety of transport phenomena that are characteristic of 2D Dirac fermions, such as extremely high mobility and anomalous quantum Hall effects. Despite being only one atom thick, graphene is found to absorb a significant fraction of incident light ∼2.3%, and the absorption is wavelength independent due to the linear band structure. Single-wall CNT is an enrolled graphene, whose typical tube diameter is ∼1nm, and length is ∼1µm, thus it is a long 1D material [2]. Its structure is determined by a single parameter, chirality. Due to periodic boundary conditions along the circumferential direction of the tube, the allowed wave vectors are quantized. Thus the band structure of a CNT is given by superposition of the slices of graphene energy band along the corresponding allowed k lines (cutting lines). In case one of the slices contains Dirac point, the CNT is metallic, otherwise the CNT has bandgap thus is semiconductiong. Semiconducting CNT has energy bandgaps, and photons having corresponding wavelength are absorbed. The bandgap energy is inversely proportional to the tube diameter
Starting Page	1
Ending Page	1
File Size	97362
Page Count	1
File Format	PDF
ISBN	9781457705335
e-ISBN	9781457705328
DOI	10.1109/CLEOE.2011.5942677
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2011-05-22
Publisher Place	Germany
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Optical fiber polarization Absorption Laser mode locking Optical wavelength conversion Optical fiber devices Fiber lasers
Content Type	Text
Resource Type	Article

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3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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