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Issue 35, 2019
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Strong-field nonlinear optical properties of monolayer black phosphorus

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Within the past few years, atomically thin black phosphorus (BP) has been demonstrated as a fascinating new 2D material that is promising for novel nanoelectronic and nanophotonic applications, due to its many unique properties such as a direct and widely tunable bandgap, high carrier mobility and remarkable intrinsic in-plane anisotropy. However, its important extreme nonlinear behavior and the ultrafast dynamics of carriers under strong-field excitation have yet to be revealed. Herein, we report nonperturbative high harmonic generation (HHG) in monolayer BP by first-principles simulations. We show that BP exhibits extraordinary HHG properties, with clear advantages over three major types of 2D materials under intensive study, i.e., semimetallic graphene, semiconducting MoS2, and insulating hexagonal boron nitride, in terms of HHG cutoff energy and spectral intensity. This study advances the scope of current research activities on BP into a new regime, suggesting its promising future in the applications of extreme-ultraviolet and attosecond nanophotonics and also opening doors to investigate the strong-field and ultrafast carrier dynamics of this emerging material.

Graphical abstract: Strong-field nonlinear optical properties of monolayer black phosphorus

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Publication details

The article was received on 10 Jun 2019, accepted on 31 Jul 2019 and first published on 01 Aug 2019

Article type: Paper
DOI: 10.1039/C9NR04895B
Nanoscale, 2019,11, 16377-16383

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    Strong-field nonlinear optical properties of monolayer black phosphorus

    Z. Chen and R. Qin, Nanoscale, 2019, 11, 16377
    DOI: 10.1039/C9NR04895B

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