Optical properties of excited states in atomically thin black phosphorus
Abstract/Contents
- Abstract
- This thesis investigates exciton-mediated light-matter interactions in atomically thin black phosphorus (BP). The goal of this work is two-fold: firstly, to elucidate the complex many-body physics intrinsic to this distinct C2-symmetric two-dimensional semiconductor, and secondly, to manipulate these physical properties using external degrees of freedom, such as the density of free charge carriers. The success of this research is predicated upon the development of innovative sample fabrication techniques, which have resulted in high-quality samples. In the following chapters, I discuss projects that focus on the intrinsic optical properties of excitons in BP. Chapter 1 introduces BP, its key properties, and the physics describing exciton light-matter interactions. Chapter 2 outlines the primary experimental techniques used in this work, namely photoluminescence and reflectance contrast spectroscopy, and delves into the specifics of our sample fabrication process. In Chapter 3, I investigate the linear optical properties of high quality monolayer BP and determine key excitonic features. Enabled by narrow optical transition linewidths, I characterize the excitonic fine structure at the band edge of monolayer BP and identify signatures of the optically dark triplet exciton. Finally, in Chapter 4, I present the first direct measurement of gate-tunable charged excitons in monolayer BP. Here I discuss the remarkably large spectral shift between the optically bright exciton and its charged counterpart. This thesis not only quantifies key properties of excitons in atomically thin BP but also underscores the material's potential as a platform for exploring novel many-body physics.
Description
| Type of resource | text |
|---|---|
| Form | electronic resource; remote; computer; online resource |
| Extent | 1 online resource. |
| Place | California |
| Place | [Stanford, California] |
| Publisher | [Stanford University] |
| Copyright date | 2023; ©2023 |
| Publication date | 2023; 2023 |
| Issuance | monographic |
| Language | English |
Creators/Contributors
| Author | O'Beirne, Aidan Luke |
|---|---|
| Degree supervisor | Heinz, Tony F |
| Thesis advisor | Heinz, Tony F |
| Thesis advisor | Feldman, Ben (Benjamin Ezekiel) |
| Thesis advisor | Jornada, Felipe |
| Degree committee member | Feldman, Ben (Benjamin Ezekiel) |
| Degree committee member | Jornada, Felipe |
| Associated with | Stanford University, School of Humanities and Sciences |
| Associated with | Stanford University, Department of Physics |
Subjects
| Genre | Theses |
|---|---|
| Genre | Text |
Bibliographic information
| Statement of responsibility | Aidan O'Beirne. |
|---|---|
| Note | Submitted to the Department of Physics. |
| Thesis | Thesis Ph.D. Stanford University 2023. |
| Location | https://purl.stanford.edu/gw190ck9695 |
Access conditions
- Copyright
- © 2023 by Aidan Luke O'Beirne
- License
- This work is licensed under a Creative Commons Attribution 3.0 Unported license (CC BY).
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