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説明:

Second harmonic generation (SHG) is a prominent branch of non-linear optics (NLO) heavily reliant on conventional bulk NLO crystals. However, the difficulty in downsizing these crystals imposes technical limitations on the future of miniaturized NLO devices. Tellurene emerges as a promising candidate to overcome these restrictions, excelling in electrical applications and believed to possess a giant second-order optical susceptibility comparable to conventional NLO crystals. In this study, a face-to-face substrate configuration is employed for the synthesis of ultrathin tellurene via PVD. Our findings reveal that tellurene's SHG performance surpasses that of monolayer transition metal dichalcogenides by two orders of magnitude, with maximum efficiency when the flake thickness is between 16 and 20 nm under various wavelengths. High sensitivity to thickness variation encourages post-growth thinning through hydrogen plasma etching, enabling precise engineering of the flake thickness for optimal SHG. This establishes a foundation for controlled tellurene thickness, further broadening its potential in diverse applications.

権利情報:

• Creative Commons BY-NC-ND Attribution-NonCommercial-NoDerivs 4.0 International
  

キーワード: Second Harmonic Generation, Transition Metal Dichalcogenide, Nonlinear Optics

刊行年月日: 2025-03-01

出版者: AIP Publishing

掲載誌:

• Applied Physics Reviews (ISSN: 19319401) vol. 12 issue. 1 011414

研究助成金:

• Centre of Excellence for Quantum Computation and Communication Technology, Australian Research Council CE170100012
• National Heart Foundation of Australia 35852
• Australian Research council DP220102219
• Australian Research council DP180103238
• Australian Research council LE200100032

原稿種別: 出版者版 (Version of record)

MDR DOI:

公開URL: https://doi.org/10.1063/5.0218276

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更新時刻: 2025-12-23 09:17:45 +0900

MDRでの公開時刻: 2025-12-23 12:19:50 +0900