Nanophotonics with 2D semiconductors : enhanced and tunable light-matter interactions
Abstract/Contents
- Abstract
- Among the many advances in nanotechnology, optical antennas have emerged as one of the most important and versatile technologies with applications in sensing, displays, photovoltaics, and imaging. The broad definition of an antenna is an element that acts as an interface between freely propagating radiation and localized energy. Our everyday experience with antennas involves using them for communication purposes such as in mobile phones and television. The advent of optical antennas was driven by the advances in nanofabrication, with resulting antenna nanostructures typically on the order of 100 nm. The main advantages of metallic/plasmonic antennas in particular are their ability to concentrate light into highly confined fields below the diffraction limit, and engineer the properties of light scattering and radiative decay. However, these antennas have weak intrinsic electrical tunability. Typical approaches to achieve tunability involve coupling the antennas with an active medium. In this thesis, I highlight transition metal dichalcogenide (TMDC) monolayers as a materials platform to integrate with nanophotonic structures due to their strong and tunable optical responses in the visible spectral range. I will first introduce the properties of optical nanoantennas and TMDC monolayers. Next, I investigate the electromagnetic coupling of TMDCs with nanophotonic structures using both full-field numerical simulations and theoretical modeling. I then present an experiment demonstration of this tunable coupling through the design, fabrication, and characterization of a coupled plasmonic antenna-TMDC system that is actively tuned by electrostatic gating. As an outlook, I discuss several other methods of active tuning, highlighting a particularly promising method of mechanically straining TMDC monolayers that we have investigated.
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 | Lee, Yan Joe |
|---|---|
| Degree supervisor | Brongersma, Mark L |
| Thesis advisor | Brongersma, Mark L |
| Thesis advisor | Dionne, Jennifer Anne |
| Thesis advisor | Fan, Shanhui, 1972- |
| Degree committee member | Dionne, Jennifer Anne |
| Degree committee member | Fan, Shanhui, 1972- |
| Associated with | Stanford University, School of Engineering |
| Associated with | Stanford University, Department of Materials Science and Engineering |
Subjects
| Genre | Theses |
|---|---|
| Genre | Text |
Bibliographic information
| Statement of responsibility | Yan Joe Lee. |
|---|---|
| Note | Submitted to the Department of Materials Science and Engineering. |
| Thesis | Thesis Ph.D. Stanford University 2023. |
| Location | https://purl.stanford.edu/jt047gf9522 |
Access conditions
- Copyright
- © 2023 by Yan Joe Lee
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