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Area of Science:

  • Condensed Matter Physics
  • Terahertz (THz) Science and Technology
  • Spintronics

Background:

  • Spintronic heterostructures offer a novel pathway for generating terahertz (THz) radiation via spin-to-charge conversion.
  • Current THz spintronic emitters face challenges in increasing radiation intensity and frequency bandwidth.

Purpose of the Study:

  • To identify and elucidate the key factors governing the engineering of spintronic THz generation.
  • To establish a roadmap for optimizing THz spintronic emitters for future applications.

Main Methods:

  • Investigated the influence of electron-defect scattering lifetime on the spectral shape of THz radiation.
  • Analyzed the impact of interface transmission on the amplitude of THz pulses.
  • Correlated these parameters with the structural properties of bilayer spintronic emitters.

Main Results:

  • Demonstrated that electron-defect scattering lifetime critically affects the spectral characteristics of emitted THz radiation.
  • Showed that interface transmission directly influences the amplitude of THz pulses.
  • Established a link between structural defects in bilayer emitters and THz generation efficiency.

Conclusions:

  • The study provides a clear understanding of how scattering lifetime and interface transmission engineer spintronic THz generation.
  • Results offer essential insights into controlling THz pulse shapes and spectra for metallic spintronic THz emitters.
  • This work lays the foundation for designing next-generation THz spintronic devices with enhanced performance.