Water-Assisted Growth of Twisted 3R-Stacked MoSe2 Spirals and Its Dramatically Enhanced Second Harmonic Generations.

Enhanced second-harmonic generation (SHG) responses are reported in monolayer transition metal dichalcogenides (e.g., MX2 , M: Mo, W; X: S, Se) due to the broken symmetries. The 3R-like stacked MX2 spiral structures possessing the similar broken inversion symmetry should present dramatically enhanced SHG responses, thus providing great flexibility in designing miniaturized on-chip nonlinear optical devices. To achieve this, the first direct synthesis of twisted 3R-stacked chiral molybdenum diselenide (MoSe2 ) spiral structures with specific screw dislocations (SD) arms is reported, via designing a water-assisted chemical vapor transport (CVT) approach. The study also clarifies the formation mechanism of the MoSe2 spiral structures, by precisely regulating the precursor supply accompanying with multiscale characterizations. Significantly, an up to three orders of magnitude enhancement of the SHG responses in twisted 3R stacked MoSe2 spirals is demonstrated, which is proposed to arise from the synergistic effects of broken inversion symmetry, strong light-matter interaction, and band nesting effects. Briefly, the work provides an efficient synthetic route for achieving the 3R-stacked TMDCs spirals, which can serve as perfect platforms for promoting their applications in on-chip nonlinear optical devices.

[1]  Xin Wu,et al.  Rational Design of a Rare-Earth Oxychalcogenide Nd3 [Ga3 O3 S3 ][Ge2 O7 ] with Superior Infrared Nonlinear Optical Performance. , 2023, Small.

[2]  Rui Zhang,et al.  Controlling the Nonlinear Optical Behavior and Structural Transformation with A-Site Cation in α-AZnPO4 (A = Li, K). , 2023, Small.

[3]  Chunhai Hu,et al.  A Rare-Earth Selenite with Unexpectedly Well-Balanced Ultraviolet Nonlinear Optical Functionality, Sc(HSeO3 )3. , 2023, Small.

[4]  C. Qiu,et al.  Giant Enhancement and Directional Second Harmonic Emission from Monolayer WS2 on Silicon Substrate via Fabry-Pérot Micro-Cavity. , 2022, ACS nano.

[5]  Zhihao Yu,et al.  Low-defect-density WS2 by hydroxide vapor phase deposition , 2022, Nature Communications.

[6]  G. Eda,et al.  Giant second-harmonic generation in ferroelectric NbOI2 , 2022, Nature Photonics.

[7]  P. Schuck,et al.  Towards compact phase-matched and waveguided nonlinear optics in atomically layered semiconductors , 2022, Nature Photonics.

[8]  T. Verbiest,et al.  Label-Free Imaging of Membrane Potentials by Intramembrane Field Modulation, Assessed by Second Harmonic Generation Microscopy. , 2022, Small.

[9]  T. Zhai,et al.  Superior Nonlinear Optical Response in Non‐Centrosymmetric Stacking Edge‐Rich Spiral MoTe2 Nanopyramids , 2022, Advanced Functional Materials.

[10]  Z. Lee,et al.  Spiral growth of adlayer graphene. , 2022, Advanced materials.

[11]  Yumeng Shi,et al.  Harmonic generation in transition metal dichalcogenides and their heterostructures , 2021, Materials Today.

[12]  V. Valev,et al.  Doubly‐Resonant Enhancement of Second Harmonic Generation from a WS2 Nanomesh Polymorph with a Modified Energy Landscape , 2021, Laser & Photonics Reviews.

[13]  Li-Yu Daisy Liu,et al.  Giant enhancement of optical nonlinearity in two-dimensional materials by multiphoton-excitation resonance energy transfer from quantum dots , 2021, Nature Photonics.

[14]  X. Bu,et al.  Crystalline Porous Materials for Nonlinear Optics. , 2021, Small.

[15]  A. Wee,et al.  Promoting a Weak Coupling of Monolayer MoSe2 Grown on (100)-Faceted Au Foil. , 2021, ACS nano.

[16]  Daniel D. Kohler,et al.  Supertwisted spirals of layered materials enabled by growth on non-Euclidean surfaces , 2020, Science.

[17]  Guowei Yang,et al.  Second harmonic generation in 2D layered materials , 2020, 2D Materials.

[18]  A. Pan,et al.  Near‐Unity Polarization of Valley‐Dependent Second‐Harmonic Generation in Stacked TMDC Layers and Heterostructures at Room Temperature , 2020, Advanced materials.

[19]  R. Agarwal,et al.  Mechanism of Extreme Optical Nonlinearities in Spiral WS2 above the Bandgap. , 2020, Nano letters.

[20]  Song Jin,et al.  Controllable Water Vapor Assisted Chemical Vapor Transport Synthesis of WS2–MoS2 Heterostructure , 2019, ACS Materials Letters.

[21]  Xinglin Wen,et al.  Nonlinear optics of two‐dimensional transition metal dichalcogenides , 2019, InfoMat.

[22]  Kenji Watanabe,et al.  Measuring Valley Polarization in Two-Dimensional Materials with Second-Harmonic Spectroscopy , 2019, ACS Photonics.

[23]  A. Pan,et al.  Controllable Growth and Formation Mechanisms of Dislocated WS2 Spirals. , 2018, Nano letters.

[24]  J. Ding,et al.  Dual-Native Vacancy Activated Basal Plane and Conductivity of MoSe2 with High-Efficiency Hydrogen Evolution Reaction. , 2018, Small.

[25]  A. Eftekhari Molybdenum diselenide (MoSe2) for energy storage, catalysis, and optoelectronics , 2017 .

[26]  Rui Wang,et al.  3R MoS2 with Broken Inversion Symmetry: A Promising Ultrathin Nonlinear Optical Device , 2017, Advanced materials.

[27]  X. Duan,et al.  Broken Symmetry Induced Strong Nonlinear Optical Effects in Spiral WS2 Nanosheets. , 2017, ACS nano.

[28]  Sheng-ping Guo,et al.  Recent achievements on middle and far-infrared second-order nonlinear optical materials , 2017 .

[29]  B. Pan,et al.  Bionanofiber Assisted Decoration of Few-Layered MoSe2 Nanosheets on 3D Conductive Networks for Efficient Hydrogen Evolution. , 2017, Small.

[30]  Ying Wang,et al.  Recent development of metal borate halides: Crystal chemistry and application in second-order NLO materials , 2016 .

[31]  D. Nam,et al.  Davydov Splitting and Excitonic Resonance Effects in Raman Spectra of Few-Layer MoSe2. , 2016, ACS nano.

[32]  E. Timurdogan,et al.  Electric field-induced second-order nonlinear optical effects in silicon waveguides , 2016, Nature Photonics.

[33]  S. Louie,et al.  Three-dimensional spirals of atomic layered MoS2. , 2014, Nano letters.

[34]  P. Ajayan,et al.  Chemical vapor deposition growth of crystalline monolayer MoSe2. , 2014, ACS nano.

[35]  M. Kanatzidis,et al.  Metal Chalcogenides: A Rich Source of Nonlinear Optical Materials , 2014 .

[36]  Paul Campagnola,et al.  Second harmonic generation imaging microscopy: applications to diseases diagnostics. , 2011, Analytical chemistry.

[37]  Andre K. Geim,et al.  Electric Field Effect in Atomically Thin Carbon Films , 2004, Science.

[38]  W. K. Burton,et al.  The growth of crystals and the equilibrium structure of their surfaces , 1951, Philosophical Transactions of the Royal Society of London. Series A, Mathematical and Physical Sciences.