Toward Accurate Thermal Modeling of Phase Change Material‐Based Photonic Devices

Author:

Aryana Kiumars1ORCID,Kim Hyun Jung1,Popescu Cosmin‐Constantin2,Vitale Steven3,Bae Hyung Bin4,Lee Taewoo4,Gu Tian25,Hu Juejun25

Affiliation:

1. NASA Langley Research Center Hampton VA 23681 USA

2. Department of Materials & Science Engineering Massachusetts Institute of Technology Cambridge MA 02139 USA

3. Lincoln Laboratory Massachusetts Institute of Technology Lexington MA 02421 USA

4. KAIST Analysis Center Korea Advanced Institute of Science and Technology Yuseong‐gu Daejeon 34141 South Korea

5. Materials Research Laboratory Massachusetts Institute of Technology Cambridge MA 02139 USA

Abstract

AbstractReconfigurable or programmable photonic devices are rapidly growing and have become an integral part of many optical systems. The ability to selectively modulate electromagnetic waves through electrical stimuli is crucial in the advancement of a variety of applications from data communication and computing devices to environmental science and space explorations. Chalcogenide‐based phase‐change materials (PCMs) are one of the most promising material candidates for reconfigurable photonics due to their large optical contrast between their different solid‐state structural phases. Although significant efforts have been devoted to accurate simulation of PCM‐based devices, in this paper, three important aspects which have often evaded prior models yet having significant impacts on the thermal and phase transition behavior of these devices are highlighted: the enthalpy of fusion, the heat capacity change upon glass transition, as well as the thermal conductivity of liquid‐phase PCMs. The important topic of switching energy scaling in PCM devices, which also helps explain why the three above‐mentioned effects have long been overlooked in electronic PCM memories but only become important in photonics, is further investigated. These findings offer insight to facilitate accurate modeling of PCM‐based photonic devices and can inform the development of more efficient reconfigurable optics.

Publisher

Wiley

Subject

Biomaterials,Biotechnology,General Materials Science,General Chemistry

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