Mechanism and modulation of terahertz generation from a semimetal - graphite

Semi-metals might offer a stronger interaction and a better confinement for terahertz wave than semiconductors, while preserve tunability. Particularly, graphene-based materials are envisioned as terahertz modulators, filters and ultra-broadband sources. However, the understanding of terahertz gener...

Full description

Bibliographic Details
Main Authors:	Ye, Tong, Meng, Sheng, Zhang, Jin, E, Yiwen, Yang, Yuping, Liu, Wuming, Yin, Yan, Wang, Li
Format:	Online
Language:	English
Published:	Nature Publishing Group 2016
Online Access:	https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4789595/

id	pubmed-4789595
recordtype	oai_dc
spelling	pubmed-47895952016-03-16 Mechanism and modulation of terahertz generation from a semimetal - graphite Ye, Tong Meng, Sheng Zhang, Jin E, Yiwen Yang, Yuping Liu, Wuming Yin, Yan Wang, Li Article Semi-metals might offer a stronger interaction and a better confinement for terahertz wave than semiconductors, while preserve tunability. Particularly, graphene-based materials are envisioned as terahertz modulators, filters and ultra-broadband sources. However, the understanding of terahertz generation from those materials is still not clear, thus limits us recognizing the potential and improving device performances. Graphite, the mother material of graphene and a typical bulk semi-metal, is a good system to study semi-metals and graphene-based materials. Here we experimentally modulate and maximize the terahertz signal from graphite surface, thus reveal the mechanism - surface field driving photon induced carriers into transient current to radiate terahertz wave. We also discuss the differences between graphite and semiconductors; particularly graphite shows very weak temperature dependency from room temperature to 80 °C. Above knowledge will help us understand terahertz generations, achieve maximum output and electric modulation, in semi-metal or graphene based devices. Nature Publishing Group 2016-03-14 /pmc/articles/PMC4789595/ /pubmed/26972818 http://dx.doi.org/10.1038/srep22798 Text en Copyright © 2016, Macmillan Publishers Limited http://creativecommons.org/licenses/by/4.0/ This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/
repository_type	Open Access Journal
institution_category	Foreign Institution
institution	US National Center for Biotechnology Information
building	NCBI PubMed
collection	Online Access
language	English
format	Online
author	Ye, Tong Meng, Sheng Zhang, Jin E, Yiwen Yang, Yuping Liu, Wuming Yin, Yan Wang, Li
spellingShingle	Ye, Tong Meng, Sheng Zhang, Jin E, Yiwen Yang, Yuping Liu, Wuming Yin, Yan Wang, Li Mechanism and modulation of terahertz generation from a semimetal - graphite
author_facet	Ye, Tong Meng, Sheng Zhang, Jin E, Yiwen Yang, Yuping Liu, Wuming Yin, Yan Wang, Li
author_sort	Ye, Tong
title	Mechanism and modulation of terahertz generation from a semimetal - graphite
title_short	Mechanism and modulation of terahertz generation from a semimetal - graphite
title_full	Mechanism and modulation of terahertz generation from a semimetal - graphite
title_fullStr	Mechanism and modulation of terahertz generation from a semimetal - graphite
title_full_unstemmed	Mechanism and modulation of terahertz generation from a semimetal - graphite
title_sort	mechanism and modulation of terahertz generation from a semimetal - graphite
description	Semi-metals might offer a stronger interaction and a better confinement for terahertz wave than semiconductors, while preserve tunability. Particularly, graphene-based materials are envisioned as terahertz modulators, filters and ultra-broadband sources. However, the understanding of terahertz generation from those materials is still not clear, thus limits us recognizing the potential and improving device performances. Graphite, the mother material of graphene and a typical bulk semi-metal, is a good system to study semi-metals and graphene-based materials. Here we experimentally modulate and maximize the terahertz signal from graphite surface, thus reveal the mechanism - surface field driving photon induced carriers into transient current to radiate terahertz wave. We also discuss the differences between graphite and semiconductors; particularly graphite shows very weak temperature dependency from room temperature to 80 °C. Above knowledge will help us understand terahertz generations, achieve maximum output and electric modulation, in semi-metal or graphene based devices.
publisher	Nature Publishing Group
publishDate	2016
url	https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4789595/
_version_	1613551142797574144

Mechanism and modulation of terahertz generation from a semimetal - graphite

Similar Items