Large-area ultrathin Te films with substrate-tunable orientation

Bianco, Elisabeth; Rao, Rahul; Snure, Michael; Back, Tyson C.; Glavin, Nicholas R.; McConney, Michael E.; Ajayan, Pulickel M.; Ringe, Emilie

doi:10.1039/d0nr01251c

Cited by 26 publications

(24 citation statements)

References 66 publications

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“…(b,c) Reproduced under the terms of the Creative Commons Attribution 3.0 Unported License. [ 174 ] Copyright 2020, Royal Society of Chemistry. d) Optical contrast intensities of 1L ReS 2 (black squares), 2L ReS 2 (red dots), and 3L ReS 2 (blue triangles) at 612.5 nm at different rotation angles.…”

Section: Modulation Of Optical Anisotropymentioning

confidence: 99%

“…The CVD‐grown Te 〈0001〉 helical chains were found to extend in the plane of HOPG and h‐BN substrates, showing anisotropic optical property (Figure 8b), while were orthogonal to the MgO(100) substrates, exhibiting isotropic property (Figure 8c). [ 174 ] On the other hand, the optical anisotropy of anisotropic materials depends on the dielectric screening effect of substrate and the interaction between the electrons and substrate surface optical phonons. [ 175 ] Compared with the SiO 2 and h‐BN substrates, Al 2 O 3 substrates make more contributions to surface optical phonon–plasmon coupling terms in total Hamiltonian, leading to stronger coupling with the phonon–plasmon modes in monolayer and bilayer BP.…”

Section: Modulation Of Optical Anisotropymentioning

confidence: 99%

“…c) Schematics of the helical Te 〈0001〉 orientation on HOPG substrate and the polarization dependence of A 1 mode intensity. (b,c) Reproduced under the terms of the Creative Commons Attribution 3.0 Unported License [174]. Copyright 2020, Royal Society of Chemistry.…”

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confidence: 99%

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Review of Anisotropic 2D Materials: Controlled Growth, Optical Anisotropy Modulation, and Photonic Applications

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et al. 2021

Laser & Photonics Reviews

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Anisotropic 2D materials are promising building blocks for future photonic and optoelectronic devices due to their low structural symmetry and in-plane optical anisotropy. This review systematically summarizes the crystalline structure, growth dynamics, optical anisotropy and their modulation strategies, and the corresponding photonic applications for emerging anisotropic 2D materials. First, the physical properties and crystalline structures of typical anisotropic 2D materials are briefly introduced. After that, special attention is paid to the growth mechanism of low-symmetry lattices, where the competition between different growth modes determines the crystal morphologies. Then, the physical principles of anisotropic optical absorption, photoluminescence, Raman scattering, photodetection, and nonlinear response are discussed based on recent scientific advances. The discussion on the techniques to modify the intrinsic in-plane anisotropy, along with the possibility of introducing optical anisotropy to the isotropic materials, add a new degree of freedom to the control over their optical properties. The review of application prospects also helps bridge the gap between the scientific exploration of novel anisotropic materials and the development of polarization-sensitive photonic devices. The discussions in this review will push forward the scientific frontier in the crystalline growth and anisotropy control of anisotropic 2D materials.

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Section: Modulation Of Optical Anisotropymentioning

confidence: 99%

Section: Modulation Of Optical Anisotropymentioning

confidence: 99%

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Review of Anisotropic 2D Materials: Controlled Growth, Optical Anisotropy Modulation, and Photonic Applications

Liu

et al. 2021

Laser & Photonics Reviews

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“…Although deposition and post‐treatment optimization were previously investigated to enhance the quality of evaporated Te film, [ 14,15,18,21,22 ] control of the amorphous to crystalline phase transformation kinetics has not yet been fully explored. In this work, we characterize and model the kinetics and dynamics of the crystallization of thermally evaporated amorphous Te films.…”

Section: Introductionmentioning

confidence: 99%

Tellurium Single‐Crystal Arrays by Low‐Temperature Evaporation and Crystallization

et al. 2021

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Thermally evaporated tellurium possesses an intriguing crystallization behavior, where an amorphous to crystalline phase transition happens at near‐ambient temperature. However, a comprehensive understanding and delicate control of the crystallization process for the evaporated Te films is lacking. Here, the kinetics and dynamics of the crystallization of thermally evaporated Te films is visualized and modeled. Low‐temperature processing of highly crystalline tellurium films with large grain size and preferred out‐of‐plane orientation ((100) plane parallel to the surface) is demonstrated by controlling the crystallization process. Tellurium single crystals with a lateral dimension of up to 6 µm are realized on various substrates including glass and plastic. Field‐effect transistors based on 5 °C crystallized Te single grains (6‐nm‐thick) exhibit an average effective hole mobility of ≈100 cm2 V−1 s−1, and on/off current ratio of ≈3 × 104.

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“…These alternative approaches are mainly based on chemical or physical vapor methods promising a potential up-scaling of the material deposition on the wafer scale and the translation of the Xene technology from laboratory to fab environment. For example, apart from MBE, antimony nanosheets were realized on Ge(111) by metallo-organic chemical vapor deposition [18], selenene was synthetized by PVD on Si (111) [41], ultra-scaled thin tellurium films were obtained, among the others, by PVD and magnetron sputtering approaches [80,81]. These are preliminary outcomes towards large scale fabrication.…”

Section: Challenges and Advances In Xene Processingmentioning

confidence: 99%

The Rise of the Xenes: From the Synthesis to the Integration Processes for Electronics and Photonics

Grazianetti

Martella

2021

Materials

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The recent outcomes related to the Xenes, the two-dimensional (2D) monoelemental graphene-like materials, in three interdisciplinary fields such as electronics, photonics and processing are here reviewed by focusing on peculiar growth and device integration aspects. In contrast with forerunner 2D materials such as graphene and transition metal dichalcogenides, the Xenes pose new and intriguing challenges for their synthesis and exploitation because of their artificial nature and stabilization issues. This effort is however rewarded by a fascinating and versatile scenario where the manipulation of the matter properties at the atomic scale paves the way to potential applications never reported to date. The current state-of-the-art about electronic integration of the Xenes, their optical and photonics properties, and the developed processing methodologies are summarized, whereas future challenges and critical aspects are tentatively outlined.

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Large-area ultrathin Te films with substrate-tunable orientation

Abstract: A novel approach affords low temperature, large area growth of ultrathin Te films with tunable orientation providing access to inherent anisotropic properties.

Cited by 26 publications

References 66 publications

Review of Anisotropic 2D Materials: Controlled Growth, Optical Anisotropy Modulation, and Photonic Applications

Review of Anisotropic 2D Materials: Controlled Growth, Optical Anisotropy Modulation, and Photonic Applications

Tellurium Single‐Crystal Arrays by Low‐Temperature Evaporation and Crystallization

The Rise of the Xenes: From the Synthesis to the Integration Processes for Electronics and Photonics

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