Related Experiment Video
Updated: Jan 16, 2026

Exfoliation and Analysis of Large-area, Air-Sensitive Two-Dimensional Materials
Published on: January 5, 2019
Ultraviolet saturable absorption behavior of black phosphorus
Yan Sun1, Zhenyu Zhao1, Zihan Ren1
1School of Physics and Optoelectronic Engineering, Shandong University of Technology, Zibo 255000, People's Republic of China.
None:
Black phosphorus (BP) has attracted much attention due to its distinctive band-gap properties and strong light-matter interaction, which make it a promising nonlinear optical material. In this study, BP nanosheets were exfoliated successfully utilizing the liquid phase exfoliation technique. Using an open-aperture Z-scan method, the broadband nonlinear absorption characteristics of BP nanosheets were studied. Under 355 nm excitation, the BP nanosheets demonstrated pronounced saturation absorption properties, with the maximum normalized transmittance of the wave peaks reaching 149% at an excitation energy of 7μJ. Moreover, the threshold for nonlinear absorption behavior in BP nanosheets at 355 nm was approximately 0.023 GW cm-2.The results showed that BP nanosheets possess strong saturable absorption properties in ultraviolet (UV) waveband. The saturable absorption characteristics of BP nanosheets make it possible to apply it in UV laser as saturable absorber, which can broaden its application in UV nonlinear optics.
Related Concept Videos
UV–Vis Spectroscopy: Molecular Electronic Transitions
UV–Vis Spectroscopy of Conjugated Systems
One of the factors influencing λmax is the extent of conjugation in...
UV–Vis Spectrum
The UV–Vis spectrum of a molecule is the plot of its absorbance versus wavelength. The plot is drawn by taking molar...
Ultraviolet and Visible (UV–Vis) Spectroscopy: Overview
UV–Vis Spectrometers
Variables Affecting Phosphorescence and Fluorescence

