Giant anisotropic photonics in the 1D van der Waals semiconductor fibrous red phosphorus

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A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
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2021-08-10
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en
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Nature Communications, Volume 12, issue 1
Abstract
A confined electronic system can host a wide variety of fascinating electronic, magnetic, valleytronic and photonic phenomena due to its reduced symmetry and quantum confinement effect. For the recently emerging one-dimensional van der Waals (1D vdW) materials with electrons confined in 1D sub-units, an enormous variety of intriguing physical properties and functionalities can be expected. Here, we demonstrate the coexistence of giant linear/nonlinear optical anisotropy and high emission yield in fibrous red phosphorus (FRP), an exotic 1D vdW semiconductor with quasi-flat bands and a sizeable bandgap in the visible spectral range. The degree of photoluminescence (third-order nonlinear) anisotropy can reach 90% (86%), comparable to the best performance achieved so far. Meanwhile, the photoluminescence (third-harmonic generation) intensity in 1D vdW FRP is strong, with quantum efficiency (third-order susceptibility) four (three) times larger than that in the most well-known 2D vdW materials (e.g., MoS2). The concurrent realization of large linear/nonlinear optical anisotropy and emission intensity in 1D vdW FRP paves the way towards transforming the landscape of technological innovations in photonics and optoelectronics.
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| openaire: EC/H2020/820423/EU//S2QUIP | openaire: EC/H2020/834742/EU//ATOP | openaire: EC/H2020/965124/EU//FEMTOCHIP
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Du, L, Zhao, Y, Wu, L, Hu, X, Yao, L, Wang, Y, Bai, X, Dai, Y, Qiao, J, Uddin, M G, Li, X, Lahtinen, J, Bai, X, Zhang, G, Ji, W & Sun, Z 2021, ' Giant anisotropic photonics in the 1D van der Waals semiconductor fibrous red phosphorus ', Nature Communications, vol. 12, no. 1, 4822 . https://doi.org/10.1038/s41467-021-25104-6