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Updated: Jun 5, 2025

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Broadband nonlinear optical modulator enabled by VO2/V2O5 core-shell heterostructures.

Longlong Chen1, Jing Huang1, Ning Li1

  • 1Key Laboratory for Micro/Nano Optoelectronic Devices of Ministry of Education & Hunan Provincial Key Laboratory of Low-Dimensional Structural Physics and Devices, School of Physics and Electronics, Hunan University, Changsha 410082, China.

Nanophotonics (Berlin, Germany)
|December 5, 2024
PubMed
Summary
This summary is machine-generated.

VO2/V2O5 core-shell heterostructures demonstrate broadband nonlinear optical properties. These materials function as effective modulators for fiber lasers across near- and mid-infrared spectra.

Keywords:
Z-scanheterostructuresnonlinear optical modulatornonlinear optics

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Area of Science:

  • Materials Science
  • Optics
  • Photonics

Background:

  • Broadband pulsed lasers are crucial for optical communications, biomedical engineering, materials processing, and defense.
  • The development of novel nonlinear optical materials is essential for advancing laser technologies.

Purpose of the Study:

  • To investigate the nonlinear optical properties of VO2/V2O5 core-shell heterostructures.
  • To evaluate their potential as broadband nonlinear optical modulators.

Main Methods:

  • Fabrication of VO2/V2O5 core-shell heterostructures.
  • Nonlinear optical characterization at various wavelengths (1064 nm, 1550 nm, 2800 nm).
  • Integration into Yb-doped, Er-doped fiber lasers, and Q-switched fiber lasers.

Main Results:

  • VO2/V2O5 heterostructures exhibit broadband nonlinear optical response in the mid-infrared range.
  • Measured modulation depths of up to 27% and saturation intensities as low as 42 GW/cm^2.
  • Successfully realized stable mode-locked fiber lasers with ultrashort pulses (down to 633 fs) and Q-switched lasers with high repetition rates (89 kHz).

Conclusions:

  • VO2/V2O5 core-shell heterostructures serve as effective broadband nonlinear optical modulators.
  • These materials offer promising applications for high-performance photonic devices across near- to mid-infrared spectra.