Near-infrared optical properties and proposed phase-change usefulness of transition metal disulfides
The development of photonic integrated circuits would benefit from a wider selection of materials that can strongly control near-infrared (NIR) light. Transition metal dichalcogenides (TMDs) have been explored extensively for visible spectrum optoelectronics; the NIR properties of these layered mate...
| Main Authors: | , , , , , , , , |
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| Other Authors: | |
| Format: | Article |
| Language: | English |
| Published: |
AIP Publishing
2019
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| Online Access: | https://hdl.handle.net/1721.1/123312 |
| _version_ | 1826199282514919424 |
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| author | Singh, Akshay k Li, Yifei Fodor, Balint Makai, Laszlo Zhou, Jian Xu, Haowei Akey, Austin Li, Ju Jaramillo, Rafael |
| author2 | Massachusetts Institute of Technology. Department of Nuclear Science and Engineering |
| author_facet | Massachusetts Institute of Technology. Department of Nuclear Science and Engineering Singh, Akshay k Li, Yifei Fodor, Balint Makai, Laszlo Zhou, Jian Xu, Haowei Akey, Austin Li, Ju Jaramillo, Rafael |
| author_sort | Singh, Akshay k |
| collection | MIT |
| description | The development of photonic integrated circuits would benefit from a wider selection of materials that can strongly control near-infrared (NIR) light. Transition metal dichalcogenides (TMDs) have been explored extensively for visible spectrum optoelectronics; the NIR properties of these layered materials have been less-studied. The measurement of optical constants is the foremost step to qualify TMDs for use in NIR photonics. Here, we measure the complex optical constants for select sulfide TMDs (bulk crystals of MoS2, TiS2, and ZrS2) via spectroscopic ellipsometry in the visible-to-NIR range. We find that the presence of native oxide layers (measured by transmission electron microscopy) significantly modifies the observed optical constants and need to be modeled to extract actual optical constants. We support our measurements with density functional theory calculations and further predict large refractive index contrast between different phases. We further propose that TMDs could find use as photonic phase-change materials, by designing alloys that are thermodynamically adjacent to phase boundaries between competing crystal structures, to realize martensitic (i.e., displacive, order-order) switching. |
| first_indexed | 2024-09-23T11:17:17Z |
| format | Article |
| id | mit-1721.1/123312 |
| institution | Massachusetts Institute of Technology |
| language | English |
| last_indexed | 2024-09-23T11:17:17Z |
| publishDate | 2019 |
| publisher | AIP Publishing |
| record_format | dspace |
| spelling | mit-1721.1/1233122022-10-01T02:38:31Z Near-infrared optical properties and proposed phase-change usefulness of transition metal disulfides Singh, Akshay k Li, Yifei Fodor, Balint Makai, Laszlo Zhou, Jian Xu, Haowei Akey, Austin Li, Ju Jaramillo, Rafael Massachusetts Institute of Technology. Department of Nuclear Science and Engineering Massachusetts Institute of Technology. Department of Materials Science and Engineering The development of photonic integrated circuits would benefit from a wider selection of materials that can strongly control near-infrared (NIR) light. Transition metal dichalcogenides (TMDs) have been explored extensively for visible spectrum optoelectronics; the NIR properties of these layered materials have been less-studied. The measurement of optical constants is the foremost step to qualify TMDs for use in NIR photonics. Here, we measure the complex optical constants for select sulfide TMDs (bulk crystals of MoS2, TiS2, and ZrS2) via spectroscopic ellipsometry in the visible-to-NIR range. We find that the presence of native oxide layers (measured by transmission electron microscopy) significantly modifies the observed optical constants and need to be modeled to extract actual optical constants. We support our measurements with density functional theory calculations and further predict large refractive index contrast between different phases. We further propose that TMDs could find use as photonic phase-change materials, by designing alloys that are thermodynamically adjacent to phase boundaries between competing crystal structures, to realize martensitic (i.e., displacive, order-order) switching. United States. Office of Naval Research (Grant N00014-17-1-2661) 2019-12-19T23:21:06Z 2019-12-19T23:21:06Z 2019-10 2019-08 2019-12-04T15:08:03Z Article http://purl.org/eprint/type/JournalArticle 0003-6951 1077-3118 https://hdl.handle.net/1721.1/123312 Singh, Akshay et al. "Near-infrared optical properties and proposed phase-change usefulness of transition metal disulfides." Applied Physics Letters 115, 16 (October 2019):161902 © 2019 Author(s) en http://dx.doi.org/10.1063/1.5124224 Applied Physics Letters Creative Commons Attribution 4.0 International license https://creativecommons.org/licenses/by/4.0/ application/pdf AIP Publishing American Institute of Physics (AIP) |
| spellingShingle | Singh, Akshay k Li, Yifei Fodor, Balint Makai, Laszlo Zhou, Jian Xu, Haowei Akey, Austin Li, Ju Jaramillo, Rafael Near-infrared optical properties and proposed phase-change usefulness of transition metal disulfides |
| title | Near-infrared optical properties and proposed phase-change usefulness of transition metal disulfides |
| title_full | Near-infrared optical properties and proposed phase-change usefulness of transition metal disulfides |
| title_fullStr | Near-infrared optical properties and proposed phase-change usefulness of transition metal disulfides |
| title_full_unstemmed | Near-infrared optical properties and proposed phase-change usefulness of transition metal disulfides |
| title_short | Near-infrared optical properties and proposed phase-change usefulness of transition metal disulfides |
| title_sort | near infrared optical properties and proposed phase change usefulness of transition metal disulfides |
| url | https://hdl.handle.net/1721.1/123312 |
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