Projekteja vuodessa
Abstrakti
Developing selective and coherent polymorphic crystals at the nanoscale offers a novel strategy for designing integrated architectures for photonic and optoelectronic applications such as metasurfaces, optical gratings, photodetectors, and image sensors. Here, a direct optical writing approach is demonstrated to deterministically create polymorphic 2D materials by locally inducing metallic 1T′-MoTe2 on the semiconducting 2H-MoTe2 host layer. In the polymorphic-engineered MoTe2, 2H- and 1T′- crystalline phases exhibit strong optical contrast from near-infrared to telecom-band ranges (1–1.5 µm), due to the change in the band structure and increase in surface roughness. Sevenfold enhancement of third harmonic generation intensity is realized with conversion efficiency (susceptibility) of ≈1.7 × 10−7 (1.1 × 10−19 m2 V−2) and ≈1.7 × 10−8 (0.3 × 10−19 m2 V−2) for 1T′ and 2H-MoTe2, respectively at telecom-band ultrafast pump laser. Lastly, based on polymorphic engineering on MoTe2, a Schottky photodiode with a high photoresponsivity of 90 AW−1 is demonstrated. This study proposes facile polymorphic engineered structures that will greatly benefit realizing integrated photonics and optoelectronic circuits.
Alkuperäiskieli | Englanti |
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Artikkeli | 2302051 |
Julkaisu | Advanced Functional Materials |
Vuosikerta | 33 |
Numero | 33 |
Varhainen verkossa julkaisun päivämäärä | 2023 |
DOI - pysyväislinkit | |
Tila | Julkaistu - 15 elok. 2023 |
OKM-julkaisutyyppi | A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä |
Sormenjälki
Sukella tutkimusaiheisiin 'Deterministic Polymorphic Engineering of MoTe2 for Photonic and Optoelectronic Applications'. Ne muodostavat yhdessä ainutlaatuisen sormenjäljen.-
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FAST: Ultrafast Data Production with Broadband Photodetectors for Active Hyperspectral Space Imaging
Sun, Z., Akkanen, S., Pajunpää, T., Cui, L., Nigmatulin, F. & Das, S.
01/01/2021 → 31/12/2023
Projekti: Academy of Finland: Other research funding
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NOIMO: Novel optical isolators to continue Moore's law in photonics integration
01/09/2020 → 31/08/2024
Projekti: Academy of Finland: Other research funding
Laitteet
Lehtileikkeet
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Researchers from Aalto University Detail Findings in Engineering (Deterministic Polymorphic Engineering of Mote2 for Photonic and Optoelectronic Applications)
Harri Lipsanen, Zhipei Sun & Lide Yao
13/06/2023
1 kohde/ Medianäkyvyys
Lehdistö/media: Esiintyminen mediassa