Please use this identifier to cite or link to this item:
Title: Strain-induced pseudo-magnetic fields in graphene for novel optoelectronic applications
Authors: Luo, Manlin
Keywords: Engineering::Nanotechnology
Issue Date: 2022
Publisher: Nanyang Technological University
Source: Luo, M. (2022). Strain-induced pseudo-magnetic fields in graphene for novel optoelectronic applications. Doctoral thesis, Nanyang Technological University, Singapore.
Abstract: The research progress toward creating efficient light sources on graphene-based electronic-photonic integrated circuits has been relatively sluggish, mainly because of graphene’s zero-bandgap nature. Recently, strain-induced pseudo-magnetic fields in graphene have attracted particular interest due to their capability to mimic real magnetic fields and create energy gaps, emerging as a promising route to favor the realization of integrated graphene optoelectronic devices. Theoretical and experimental work on generating strain-induced pseudo-magnetic fields in graphene has been demonstrated. In the meantime, scanning tunneling spectroscopy has repeatedly witnessed the pseudo-Landau levels in strained graphene and verified the existence of pseudo-magnetic fields. However, the effect of pseudo-magnetic fields has been rarely explored in graphene thus far. Moreover, previous attempts to experimentally achieve strain-induced pseudo-magnetic fields have mostly been limited to the nanometer scale, making it challenging to harness them in graphene-based optoelectronic applications. In this thesis, we focus on investigating strain-induced pseudo-magnetic fields in graphene. Starting from fabricating highly strained graphene on nanopillars, we demonstrate how pseudo-magnetic fields change the optical properties of graphene. In the second part, we experimentally induce quasi- uniform pseudo-magnetic fields over an area that can be at the micrometer scale. The demonstrated platform allows customizing the strain distribution in a simple and reproducible way. Using theoretical simulations, we also present the possibility of creating an efficient graphene-based laser. Lastly, I strive to show that graphene holds the potential to act as a light source material by employing ultrafast photoluminescence measurement. Throughout this thesis, we discuss the realization and effect of strain-induced pseudo-magnetic fields in graphene that will help pave the way towards facilitating graphene-based light sources and completing graphene-based electronic-photonic integrated circuits.
DOI: 10.32657/10356/161423
Schools: School of Electrical and Electronic Engineering 
Rights: This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License (CC BY-NC 4.0).
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:EEE Theses

Files in This Item:
File Description SizeFormat 
PhD_Thesis_(final).pdf7.4 MBAdobe PDFThumbnail

Page view(s)

Updated on Sep 25, 2023

Download(s) 50

Updated on Sep 25, 2023

Google ScholarTM




Items in DR-NTU are protected by copyright, with all rights reserved, unless otherwise indicated.