Erickson, John R.
(2023)
Investigation into the Design and Operation of Foundry Compatible Electrically Driven Waveguide-Integrated Microheaters for Phase Change Photonics.
Doctoral Dissertation, University of Pittsburgh.
(Unpublished)
Abstract
Phase change chalcogenides such as Ge2Sb2Te5 (GST) enable advanced optical devices for applications such as in-memory computing, reflective displays, tunable metasurfaces, and reconfigurable photonics. Designing reliable and efficient electrical heaters to control phase change materials can be challenging due to the strict thermal requirements required to achieve reversible switching devices, namely high temperatures and extremely fast quenching rates for amorphization. This dissertation presents a multiphysics simulation framework for modeling semiconductor waveguide-integrated microheaters designed to switch optical phase change materials, as well as experimental characterizations of fabricated devices. The developed model is used to explore the effects of geometry, doping, and electrical pulse parameters, enabling optimization of switching speed and energy consumption in these electro-optical devices. Experimental Raman thermometry data is presented that verifies the theoretical framework, and new heater structures with the potential for improved performance are proposed for theoretical and experimental investigation. These novel heater structures’ optical performances and electrothermal efficiencies are compared, creating design guidelines for application-specific implementation.
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Details
| Item Type: |
University of Pittsburgh ETD
|
| Status: |
Unpublished |
| Creators/Authors: |
|
| ETD Committee: |
|
| Date: |
13 June 2023 |
| Date Type: |
Publication |
| Defense Date: |
21 March 2023 |
| Approval Date: |
13 June 2023 |
| Submission Date: |
24 March 2023 |
| Access Restriction: |
No restriction; Release the ETD for access worldwide immediately. |
| Number of Pages: |
156 |
| Institution: |
University of Pittsburgh |
| Schools and Programs: |
Swanson School of Engineering > Electrical and Computer Engineering |
| Degree: |
PhD - Doctor of Philosophy |
| Thesis Type: |
Doctoral Dissertation |
| Refereed: |
Yes |
| Uncontrolled Keywords: |
Silicon Photonics, Photonic integrated circuits, PIN microheater, single-doped microheater, PN microheater, phase change photonics |
| Date Deposited: |
13 Jun 2023 14:02 |
| Last Modified: |
13 Jun 2023 14:02 |
| URI: |
http://d-scholarship.pitt.edu/id/eprint/44324 |
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