Adjoint optimization of free-space metasurfaces
Abstract/Contents
- Abstract
- Metasurfaces are ultrathin optical elements that are highly promising for constructing lightweight and compact optical systems. In order to enhance the capabilities of the technology beyond what is achievable with conventional optics, I introduce a method for designing free-space metasurfaces via adjoint topology optimization. Using silicon on glass as a platform, I demonstrate that the optimization of wavelength-scale sections can be used to construct both periodic and aperiodic optical devices. For periodic devices, I show the process for optimizing a polarization-insensitive grating which efficiently deflects light to 75 degrees, as well as gratings which are capable of independently splitting up to 5 separate wavelengths. For aperiodic devices, I demonstrate the process by which we construct large objects, such as lenses, using wavelength-scale sections that are individually optimized to deflect to specific angles with a specified phase delay. Overall, we envision that the proper application of optimization techniques to free-space metasurfaces can realize their usage in enabling technologies requiring compact control over multiple distinct channels of light.
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 | 2019; ©2019 |
| Publication date | 2019; 2020 |
| Issuance | monographic |
| Language | English |
Creators/Contributors
| Author | Sell, David |
|---|---|
| Degree supervisor | Byer, R. L. (Robert L.), 1942- |
| Degree supervisor | Fan, Jonathan Albert |
| Thesis advisor | Byer, R. L. (Robert L.), 1942- |
| Thesis advisor | Fan, Jonathan Albert |
| Thesis advisor | Vuckovic, Jelena |
| Degree committee member | Vuckovic, Jelena |
| Associated with | Stanford University, Department of Applied Physics. |
Subjects
| Genre | Theses |
|---|---|
| Genre | Text |
Bibliographic information
| Statement of responsibility | David Sell. |
|---|---|
| Note | Submitted to the Department of Applied Physics. |
| Thesis | Thesis Ph.D. Stanford University 2020. |
| Location | electronic resource |
Access conditions
- Copyright
- © 2019 by David Sell
- License
- This work is licensed under a Creative Commons Attribution 3.0 Unported license (CC BY).
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