Citation
Roberts, Gregory David (2024) Design, Realization, and Applications of 3D Multifunctional Nanophotonics. Dissertation (Ph.D.), California Institute of Technology. doi:10.7907/1r1w-0234. https://resolver.caltech.edu/CaltechTHESIS:08232023-220808049
Abstract
Metaoptics leverages electromagnetic phenomena and the advanced abilities of modern nanofabrication to replicate traditional optical devices in a fraction of the thickness and to realize novel, compact, multifunctional devices with no known bulk equivalent. Motivated by the expanding role of optics in modern technologies, this field has seen a rise in design techniques for realizing increasingly powerful photonic structures. Three-dimensional (3D) devices, with refractive index distributions patterned at subwavelength scales, represent an enormous design space capable of achieving highly efficient, free space, multifunctional structures. By utilizing a gradient-based, iterative optimization algorithm, a technique for nanophotonic inverse design, we demonstrate scattering structures with unique responses to all the fundamental properties of light. The algorithm is constrained such that resulting devices can be made with realistic multilayer fabrication processes. We present dielectric structures that can be placed directly on top of image sensor arrays and sort light to different pixels based on its wavelength, polarization, and angular momentum, thus enabling efficient and exotic camera technologies. The following work contains fabrication and measurement of 3D devices in the mid-infrared, practical evaluations of devices for visible light imaging applications, and visualizations of underlying structure of photonic design optimization problems.
| Item Type: | Thesis (Dissertation (Ph.D.)) | |||||||||
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| Subject Keywords: | metaoptics, inverse design, electromagnetics, imaging, metasurfaces, optics, nanofabrication, two-photon lithography, 3d printing, mid-infrared | |||||||||
| Degree Grantor: | California Institute of Technology | |||||||||
| Division: | Engineering and Applied Science | |||||||||
| Major Option: | Applied Physics | |||||||||
| Thesis Availability: | Not set | |||||||||
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| Defense Date: | 10 August 2023 | |||||||||
| Non-Caltech Author Email: | grerobertsg (AT) gmail.com | |||||||||
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| Record Number: | CaltechTHESIS:08232023-220808049 | |||||||||
| Persistent URL: | https://resolver.caltech.edu/CaltechTHESIS:08232023-220808049 | |||||||||
| DOI: | 10.7907/1r1w-0234 | |||||||||
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| Default Usage Policy: | No commercial reproduction, distribution, display or performance rights in this work are provided. | |||||||||
| ID Code: | 16164 | |||||||||
| Collection: | CaltechTHESIS | |||||||||
| Deposited By: | Gregory Roberts | |||||||||
| Deposited On: | 19 Sep 2023 16:12 | |||||||||
| Last Modified: | 19 Sep 2023 16:12 |
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