Please use this identifier to cite or link to this item: http://scholarbank.nus.edu.sg/handle/10635/123923
Title: GRAPHENE BASED TERAHERTZ DEVICES
Authors: WU YANG
Keywords: Terahertz, Graphene, Phase shifters, Modulators, Ionic liquids, Reflectors
Issue Date: 18-Jan-2016
Citation: WU YANG (2016-01-18). GRAPHENE BASED TERAHERTZ DEVICES. ScholarBank@NUS Repository.
Abstract: TERAHERTZ (THZ) WAVES, A RANGE OF ELECTROMAGNETIC WAVE WITH FREQUENCY 0.1 TO 10 THZ, HAVE GREAT POTENTIAL IN WIDE RANGE OF APPLICATIONS, SUCH AS SPECTROSCOPY, SAFETY SURVEILLANCE, CANCER DIAGNOSIS, IMAGING, AND COMMUNICATION. KEY THZ COMPONENTS, SUCH AS PHASE SHIFTERS AND MODULATORS/REFLECTORS, ARE IMPORTANT FOR THZ WAVE MANIPULATIONS. IN THIS THESIS, THE UNIQUE PROPERTIES OF GRAPHENE ARE UTILIZED TO IMPROVE THE PERFORMANCES OF THZ DEVICES. IN THE GRAPHENE AND LIQUID CRYSTAL BASED THZ PHASE SHIFTERS, GRAPHENE PLAYS THE ROLE AS TRANSPARENT ELECTRODES WHICH PROVIDE A HIGH ELECTRICAL CONDUCTIVITY FOR THE CONTROL OF THE LIQUID CRYSTALS; MEANWHILE THE HIGH TRANSMITTANCE OF GRAPHENE FOR BROADBAND THZ WAVES ENABLES A NEW DESIGN FOR THE PHASE SHIFTERS, RESULTING IN COMPACT SIZE AND LOW VOLTAGE OPERATION. IN THE THZ MODULATORS/REFLECTORS, GRAPHENE NOT ONLY FUNCTIONS AS TRANSPARENT ELECTRODES, BUT ALSO CONTROLS THE THZ PROPAGATION BY TUNING ITS FERMI LEVEL. THE HIGH CARRIER MOBILITIES OF ELECT
URI: http://scholarbank.nus.edu.sg/handle/10635/123923
Appears in Collections:Ph.D Theses (Open)

Show full item record
Files in This Item:
File Description SizeFormatAccess SettingsVersion 
WuY.pdf6.05 MBAdobe PDF

OPEN

NoneView/Download

Page view(s)

169
checked on Nov 16, 2018

Download(s)

195
checked on Nov 16, 2018

Google ScholarTM

Check


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.