Prof. Weitao Liu Profile

Prof. Weitao Liu

at Fudan Univ

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Proceedings Article | 10 October 2020 Presentation

Unconventional nonlinear optical responses from doped graphene

Weitao Liu

Proceedings Volume 11558, 1155807 (2020) https://doi.org/10.1117/12.2575017

KEYWORDS: Graphene, Optical properties, Harmonic generation, Optoelectronics, Doping, Nonlinear dynamics, Second-harmonic generation, Ultrafast phenomena, Luminescence

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The control of optical properties by electric means is the key to optoelectronic applications. For atomically thin two-dimensional (2D) materials, the natural advantage lies in that the carrier doping could be readily controlled through the electric gating effect, possibly affecting the optical properties. By exploiting this advantage, we studied nonlinear optical responses from doped graphene, including both coherent nonlinear processes such as the second harmonic generation (SHG) and third harmonic generation (THG), and the incoherent ultrafast photoluminescence (PL). The demonstration of these broadband, electrically tunable nonlinear optical responses in graphene is promising for a host of nonlinear optical applications. [1] T. Jiang et al., Nat. Photon. 12, 430 (2018). [2] Y. Zhang et al., Phys. Rev. Lett. 112, 047401 (2019). [3] D. Huang et al., Nano Lett. 16, 7985 (201

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