Journal
ADVANCED MATERIALS TECHNOLOGIES
Volume 4, Issue 4, Pages -Publisher
WILEY
DOI: 10.1002/admt.201800532
Keywords
all-optical devices; Mach-Zehnder interferometer; MXene Ti3C2Tx; nanomaterials; thermo-optical effect
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Funding
- NSFC [61505005/51778030]
- Science and Technology Development Fund, Macao SAR, China [007/2017/A1, 132/2017/A3]
- National Natural Science Foundation of China (NSFC) [61435010, 61875138]
- Science and Technology Innovation Commission of Shenzhen [JCYJ20170818093453105]
- National Natural Science Foundation of China [61805146]
- China Postdoctoral Science Foundation [2018M643165]
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As a new class of 2D materials, MXenes have attracted a lot of interest because of their prominent performance in versatile applications, such as batteries, supercapacitors, catalysts, electronics, and optics. In this work, an all-optical modulator using MXene Ti3C2Tx deposited on a microfiber is proposed. By inserting an MXene-deposited phase shifter into one arm of a Mach-Zehnder interferometer, the MXene Ti3C2Tx absorbs the control light and generates heat, which induces significant refractive index changes through strong light-matter interactions and thermo-optic effects. In this study, a maximum phase shift of 16 pi is obtained, and an efficient all-optical switch with an extinction ratio of more than 18.53 dB and a rise time constant of 4.10 ms are demonstrated. The advantages of this modulator include its all-fiber content, low cost, ease of integration, and compactness. All-optical modulators based on thermo-optical effects will play an active role in the future of optical communications and optical information processing.
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