Chang, X and Li, J and Mu, J and Ma, C-H and Huang, W and Zhu, H-F and Liu, Q and Du, L-H and Zhong, S-C and Zhai, Z-H and Das, S and Huang, Y-L and Zhu, G-B and Zhu, L-G and Shi, Q (2023) Impact of the uniaxial strain on terahertz modulation characteristics in flexible epitaxial VO2 film across the phase transition. In: Optics Express, 31 (8). pp. 13243-13254.
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Abstract
Exploring flexible electronics is on the verge of innovative breakthroughs in terahertz (THz) communication technology. Vanadium dioxide (VO2) with insulator-metal transition (IMT) has excellent application potential in various THz smart devices, but the associated THz modulation properties in the flexible state have rarely been reported. Herein, we deposited an epitaxial VO2 film on a flexible mica substrate via pulsed-laser deposition and investigated its THz modulation properties under different uniaxial strains across the phase transition. It was observed that the THz modulation depth increases under compressive strain and decreases under tensile strain. Moreover, the phase-transition threshold depends on the uniaxial strain. Particularly, the rate of the phase transition temperature depends on the uniaxial strain and reaches approximately 6 °C/ in the temperature-induced phase transition. The optical trigger threshold in laser-induced phase transition decreased by 38.9 under compressive strain but increased by 36.7 under tensile strain, compared to the initial state without uniaxial strain. These findings demonstrate the uniaxial strain-induced low-power triggered THz modulation and provide new insights for applying phase transition oxide films in THz flexible electronics.
| Item Type: | Journal Article |
|---|---|
| Publication: | Optics Express |
| Publisher: | Optica Publishing Group (formerly OSA) |
| Additional Information: | The copyright for this article belongs to the Authors. |
| Keywords: | Flexible electronics; Metal insulator transition; Mica; Oxide films; Pulsed laser deposition; Pulsed lasers; Tensile strain, Communicationtechnology; Compressive strain; Flexible state; Insulator metal transition; Mica substrates; Modulation characteristics; Modulation properties; Smart devices; Tera Hertz; Uniaxial strains, Vanadium dioxide |
| Department/Centre: | Division of Chemical Sciences > Materials Research Centre |
| Date Deposited: | 23 May 2023 03:11 |
| Last Modified: | 23 May 2023 03:11 |
| URI: | https://eprints.iisc.ac.in/id/eprint/81553 |
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