Ultrafast Terahertz Spectroscopy of Carrier Dynamics in Semimetallic MoTe<sub>2</sub> Thin Films

Long Geng; Yifan Cheng; Chen Wang; Kaiwen Sun; Peng Suo; Xian Lin; Di Wu; Xinjian Li; Guohong Ma

doi:10.3788/AOS250834

Acta Optica Sinica, Volume. 45, Issue 15, 1530003(2025)

Ultrafast Terahertz Spectroscopy of Carrier Dynamics in Semimetallic MoTe₂ Thin Films

Long Geng¹, Yifan Cheng¹, Chen Wang¹, Kaiwen Sun¹, Peng Suo¹, Xian Lin¹, Di Wu², Xinjian Li², and Guohong Ma^1、*

Author Affiliations

¹Department of Physics, Shanghai University, Shanghai 200444, China

²School of Physics and Microelectronics, Key Laboratory of Material Physics, Ministry of Education, Zhengzhou University, Zhengzhou 450052, Henan , China

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References(31)

[1] Xie J Y, Qian J, Wang T J et al. Integrated terahertz vortex beam emitter for rotating target detection[J]. Advanced Photonics, 5, 066002(2023).

[2] Zhou H Y, Zhang S, Wang S J et al. Optically controlled dielectric metasurfaces for dynamic dual-mode modulation on terahertz waves[J]. Advanced Photonics, 5, 026005(2023).

[3] Huber R, Tauser F, Brodschelm A et al. How many-particle interactions develop after ultrafast excitation of an electron‒hole plasma[J]. Nature, 414, 286-289(2001).

[4] Sun D, Aivazian G, Jones A M et al. Ultrafast hot-carrier-dominated photocurrent in graphene[J]. Nature Nanotechnology, 7, 114-118(2012).

[5] Fausti D, Tobey R I, Dean N et al. Light-induced superconductivity in a stripe-ordered cuprate[J]. Science, 331, 189-191(2011).

[6] Zhu W H, Liu J X, Zhao J et al. Tunable broadband and high circular dichroism metasurface based on phase-change materials[J]. Acta Optica Sinica, 45, 0926003(2025).

[7] Ren Z, Shang D K, Lu X Y et al. Induction of positron creation in Dirac vacuum by super intense laser sequence[J]. Acta Optica Sinica, 44, 2027002(2024).

[8] Tong Z, Li S H, Ruan X L et al. Comprehensive first-principles analysis of phonon thermal conductivity and electron-phonon coupling in different metals[J]. Physical Review B, 100, 144306(2019).

[9] Pomarico E, Mitrano M, Bromberger H et al. Enhanced electron-phonon coupling in graphene with periodically distorted lattice[J]. Physical Review B, 95, 024304(2017).

[10] Kim S, Kim J H, Kim D et al. Post-patterning of an electronic homojunction in atomically thin monoclinic MoTe2[J]. 2D Materials, 4, 024004(2017).

[11] Keum D H, Cho S, Kim J H et al. Bandgap opening in few-layered monoclinic MoTe2[J]. Nature Physics, 11, 482-486(2015).

[12] Tang S J, Zhang C F, Jia C J et al. Electronic structure of monolayer 1T′-MoTe2 grown by molecular beam epitaxy[J]. APL Materials, 6, 026601(2017).

[13] Rivas N, Zhong S Z, Dekker T et al. Generation and detection of coherent longitudinal acoustic waves in ultrathin 1T′-MoTe2[J]. Applied Physics Letters, 115, 223103(2019).

[14] Park J C, Jung E, Lee S Y et al. Evidence of shallow band gap in ultrathin 1T′-MoTe2 via infrared spectroscopy[J]. Physical Review B, 101, 235434(2020).

[15] Chen J M, Suo P, Zhang W J et al. Photocarrier-driven emergence of negative photoconductivity in semimetal MoTe2 films revealed with terahertz spectroscopy[J]. The Journal of Physical Chemistry C, 126, 9407-9415(2022).

[16] Tomadin A, Hornett S M, Wang H I et al. The ultrafast dynamics and conductivity of photoexcited graphene at different Fermi energies[J]. Science Advances, 4, eaar5313(2018).

[17] Kar S, Su Y, Nair R R et al. Probing photoexcited carriers in a few-layer MoS2 laminate by time-resolved optical pump-terahertz probe spectroscopy[J]. ACS Nano, 9, 12004-12010(2015).

[18] Guo Y Y, Chen Z Q, Jin Z M et al. Dynamically controllable terahertz electromagnetic interference shielding by small polaron responses in Dirac semimetal PdTe2 thin films[J]. Advanced Functional Materials, 34, 2407749(2024).

[19] Ye Z J, Jin Z M, Jiang Y X et al. Comprehensive study of the ultrafast photoexcited carrier dynamics in Sb2Te3‒GeTe superlattices[J]. Chinese Physics B, 33, 074210(2024).

[20] Tielrooij K J, Song J C W, Jensen S A et al. Photoexcitation cascade and multiple hot-carrier generation in graphene[J]. Nature Physics, 9, 248-252(2013).

[21] Musić S, Filipović-Vinceković N, Sekovanić L. Precipitation of amorphous SiO2 particles and their properties[J]. Brazilian Journal of Chemical Engineering, 28, 89-94(2011).

[22] Lu W, Ling J W, Xiu F X et al. Terahertz probe of photoexcited carrier dynamics in the Dirac semimetal Cd3As2[J]. Physical Review B, 98, 104310(2018).

[23] Dai Y M, Bowlan J M, Li H et al. Ultrafast carrier dynamics in the large magnetoresistance material WTe2[J]. Physical Review B, 92, 161104(2015).

[24] Ishida Y, Masuda H, Sakai H et al. Revealing the ultrafast light-to-matter energy conversion before heat diffusion in a layered Dirac semimetal[J]. Physical Review B, 93, 100302(2016).

[25] Weber C P, Arushanov E, Berggren B S et al. Transient reflectance of photoexcited Cd3As2[J]. Applied Physics Letters, 106, 231904(2015).

[26] Lu W, Ge S F, Liu X F et al. Ultrafast relaxation dynamics of photoexcited Dirac fermions in the three dimensional Dirac semimetal Cd3As2[J]. Physical Review B, 95, 024303(2017).

[27] Meggiolaro D, Ambrosio F, Mosconi E et al. Polarons in metal halide perovskites[J]. Advanced Energy Materials, 10, 1902748(2020).

[28] Miyata K, Meggiolaro D, Trinh M T et al. Large polarons in lead halide perovskites[J]. Science Advances, 3, e1701217(2017).

[29] McKenna K P, Wolf M J, Shluger A L et al. Two-dimensional polaronic behavior in the binary oxides m-HfO2 and m-ZrO2[J]. Physical Review Letters, 108, 116403(2012).

[30] Suo P, Zhang H Y, Yan S N et al. Observation of negative terahertz photoconductivity in large area type-II Dirac semimetal PtTe2[J]. Physical Review Letters, 126, 227402(2021).

[31] Jin Z M, Peng Y, Fang Y Q et al. Photoinduced large polaron transport and dynamics in organic‒inorganic hybrid lead halide perovskite with terahertz probes[J]. Light: Science & Applications, 11, 209(2022).

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Long Geng, Yifan Cheng, Chen Wang, Kaiwen Sun, Peng Suo, Xian Lin, Di Wu, Xinjian Li, Guohong Ma. Ultrafast Terahertz Spectroscopy of Carrier Dynamics in Semimetallic MoTe₂ Thin Films[J]. Acta Optica Sinica, 2025, 45(15): 1530003

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Paper Information

Category: Spectroscopy

Received: Apr. 2, 2025

Accepted: May. 6, 2025

Published Online: Aug. 7, 2025

The Author Email: Guohong Ma (ghma@staff.shu.edu.cn)

DOI:10.3788/AOS250834

CSTR:32393.14.AOS250834

Topics

laser devices and laser physics

Lasers and Laser Optics

Laser physics

laser manufacturing

Instrumentation, Measurement and Metrology