Gaseous plasmonic resonators for metamaterial applications
Abstract/Contents
- Abstract
- In this dissertation, we explore the potential to generate metamaterials out of thin air using high-energy lasers. The artificial atom or meta-atom studied is a laser-induced plasma generated by focusing a high-energy laser pulse through a lens and into a gas. The resulting plasma spheroid behaves similar to a metallic spheroid, but with the additional properties of both tunability and stealth. The research into these gaseous plasmonic resonators was divided into two main parts. The first dealt with the scattering properties of a single subwavelength laser-induced plasma. In this part of the investigation a simple analytical model is used to describe the scattering resonance of these near-ellipsoidal plasmas and its dependence on their eccentricity and intrinsic plasma properties. This dependence is investigated through Ku band transmission experiments of a waveguide with an embedded single plasma element and optical diagnostics of the laser-induced plasma. Once the resonant properties of the single laser-induced plasma were confirmed, we moved onto the second part of our investigation, which focused on studying the scattering properties of a two-dimensional array of these subwavelength plasmas. Similar to the single-particle investigation, a simple analytical model is used to describe the scattering properties of a laser-induced plasma metasurface. Results from this model are compared to those of electromagnetic simulations to confirm its validity. The model and simulations were then used to determine that a reflection/absorption band would result from an electromagnetic wave incident on an array of these resonators. The reflection band was a result of destructive and constructive interferences between wavelets scattered from the resonators, which redistribute energy from lateral to backward scattering, i.e., reflection. The existence of the described reflection/absorption band was verified experimentally confirming the potential to achieve an all-plasma metamaterial effect in the microwave regime of the electromagnetic spectrum.
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 | 2018; ©2018 |
| Publication date | 2018; 2018 |
| Issuance | monographic |
| Language | English |
Creators/Contributors
| Author | Colón Quiñones, Roberto Alejandro |
|---|---|
| Degree supervisor | Cappelli, Mark A. (Mark Antony) |
| Thesis advisor | Cappelli, Mark A. (Mark Antony) |
| Thesis advisor | Close, Sigrid, 1971- |
| Thesis advisor | Fan, Jonathan Albert |
| Degree committee member | Close, Sigrid, 1971- |
| Degree committee member | Fan, Jonathan Albert |
| Associated with | Stanford University, Department of Mechanical Engineering. |
Subjects
| Genre | Theses |
|---|---|
| Genre | Text |
Bibliographic information
| Statement of responsibility | Roberto A. Colón Quiñones. |
|---|---|
| Note | Submitted to the Department of Mechanical Engineering. |
| Thesis | Thesis Ph.D. Stanford University 2018. |
| Location | electronic resource |
Access conditions
- Copyright
- © 2018 by Roberto Alejandro Colon Quinones
- License
- This work is licensed under a Creative Commons Attribution Non Commercial 3.0 Unported license (CC BY-NC).
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