Ultrafast dynamics of photoexcitations in 2D Ti3C2Tz, Mo2Ti2C3Tz, and Nb2CTz MXenes

Erika Colin-Ulloa; Kiana Montazeri; Varun Natu; Andrew Fitzgerald; Ken Ngo; Joshua Uzarski; Michel W. Barsoum; Lyubov V. Titova

doi:10.1117/12.2649428

15 March 2023 Ultrafast dynamics of photoexcitations in 2D Ti₃C₂T_z, Mo₂Ti₂C₃T_z, and Nb₂CT_z MXenes

Erika Colin-Ulloa, Kiana Montazeri, Varun Natu, Andrew Fitzgerald, Ken Ngo, Joshua Uzarski, Michel W. Barsoum, Lyubov V. Titova

Author Affiliations +

Proceedings Volume 12419, Ultrafast Phenomena and Nanophotonics XXVII; 1241908 (2023) https://doi.org/10.1117/12.2649428
Event: SPIE OPTO, 2023, San Francisco, California, United States

Abstract

MXenes are a new class of intrinsically metallic 2D materials. Their wide range of optoelectronic properties they demonstrate as a function of their chemical composition suggest applications in electronic and photonic devices. In this work we present a comprehensive study of the optical properties of three members of the MXene family, Ti₃C₂T_z, Mo₂Ti₂C₃T_z, and Nb₂CT_z, using ultrafast transient optical absorption and THz spectroscopy. We find that those properties result from a complicated interaction between free carriers, interband transitions and localized surface plasmon resonances. Elucidating the nature of photoexcitation and dynamics of carriers in these emergent materials will lay the foundation for their potential for optoelectronic applications.

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Erika Colin-Ulloa, Kiana Montazeri, Varun Natu, Andrew Fitzgerald, Ken Ngo, Joshua Uzarski, Michel W. Barsoum, and Lyubov V. Titova "Ultrafast dynamics of photoexcitations in 2D Ti₃C₂T_z, Mo₂Ti₂C₃T_z, and Nb₂CT_z MXenes", Proc. SPIE 12419, Ultrafast Phenomena and Nanophotonics XXVII, 1241908 (15 March 2023); https://doi.org/10.1117/12.2649428

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