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Updated: Mar 13, 2026

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Resonantly Increased Optical Frequency Conversion in Atomically Thin Black Phosphorus.

Manuel J L F Rodrigues1, Christiano J S de Matos2, Yi Wei Ho1

  • 1Centre for Advanced 2D Materials and Graphene Research Centre, National University of Singapore, 6 Science Drive 2, 117546, Singapore, Singapore.

Advanced Materials (Deerfield Beach, Fla.)
|October 19, 2016
PubMed
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This summary is machine-generated.

Few-layer black phosphorus shows enhanced third harmonic generation, a nonlinear optical process. This enhancement is linked to exciton resonance, observed through photoluminescence, and achieved using mechanical exfoliation and laser thinning.

Area of Science:

  • Materials Science
  • Nonlinear Optics
  • Condensed Matter Physics

Background:

  • Nonlinear optical phenomena are crucial for advanced photonic applications.
  • Few-layer black phosphorus exhibits unique electronic and optical properties.
  • Third harmonic generation (THG) is a key third-order nonlinear optical process.

Purpose of the Study:

  • To investigate the potential of few-layer black phosphorus for enhanced optical frequency conversion.
  • To explore the underlying mechanisms responsible for nonlinear optical enhancements in this material.

Main Methods:

  • Fabrication of few-layer black phosphorus via mechanical exfoliation and laser thinning.
  • Characterization of material thickness and quality.
  • Measurement of third harmonic generation efficiency.
Keywords:
black phosphorusexcitonsnonlinear opticsphosphorenethird-harmonic generation

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  • Correlation of THG enhancement with photoluminescence spectra.

    • Main Results:

    • Resonant enhancement of third harmonic generation was observed in few-layer black phosphorus.
    • The enhancement strongly correlates with exciton-recombination photoluminescence.
    • Thickness control of few-layer black phosphorus was achieved through two distinct methods.

    Conclusions:

    • Few-layer black phosphorus is a promising material for resonant optical frequency conversion.
    • Exciton-related resonances play a significant role in enhancing nonlinear optical effects.
    • The findings open avenues for novel photonic devices utilizing black phosphorus.