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Investigation into the Design and Operation of Foundry Compatible Electrically Driven Waveguide-Integrated Microheaters for Phase Change Photonics

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 (Unpublished)

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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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Item Type: University of Pittsburgh ETD
Status: Unpublished
CreatorsEmailPitt UsernameORCID
Erickson, John R.jre31@pitt.edujre31
ETD Committee:
TitleMemberEmail AddressPitt UsernameORCID
Thesis AdvisorXiong, Fengf.xiong@pitt.eduf.xiong
Thesis AdvisorYoungblood, Nathannathan.youngblood@pitt.edunathan.youngblood
Committee MemberFullerton, Susanfullerton@pitt.edufullerton
Committee MemberHu, JingtongJTHU@pitt.eduJTHU
Committee MemberEl Nokali, Mahmoudmen@pitt.edumen
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


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