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Related Experiment Video

Updated: Jul 1, 2025

Atomic Layer Deposition of Vanadium Dioxide and a Temperature-dependent Optical Model
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Multifield-Modulated Spintronic Terahertz Emitter Based on a Vanadium Dioxide Phase Transition.

Ting Zhou1, Liang Li1, Yangkai Wang2

  • 1National Synchrotron Radiation Laboratory, School of Nuclear Science and Technology, University of Science and Technology of China, Hefei, Anhui 230029, P. R. China.

ACS Applied Materials & Interfaces
|March 6, 2024
PubMed
Summary
This summary is machine-generated.

Researchers developed a novel spintronic terahertz (THz) emitter using VO2/Ni/Pt films. This device offers efficient, tunable THz wave generation and modulation for compact THz systems.

Keywords:
emittermodulationspintronicterahertzvanadium oxide

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Area of Science:

  • Terahertz (THz) optoelectronics
  • Spintronics
  • Materials science

Background:

  • Efficient generation and modulation of terahertz (THz) waves are crucial for applications like imaging, spectroscopy, and communication.
  • Miniaturization of THz systems is essential due to increasing integration of THz optoelectronic devices.
  • Integrating THz sources with modulators for scalable, on-chip emitters remains a significant challenge.

Purpose of the Study:

  • To propose and demonstrate a novel multifield-modulated spintronic THz emitter.
  • To investigate the modulation capabilities of a VO2/Ni/Pt multilayer structure for THz wave generation.
  • To achieve efficient modulation of THz emission using thermal or electrical stimuli.

Main Methods:

  • Fabrication of a multilayer film structure comprising Vanadium Dioxide (VO2), Nickel (Ni), and Platinum (Pt).
  • Utilizing the phase transition properties of the VO2 layer to modulate THz emission.
  • Applying thermal and electrical stimuli to control the modulation depth of the spintronic THz emitter.

Main Results:

  • A spintronic THz emitter with a wide band region of 0-3 THz was successfully developed.
  • The emitter exhibited efficient modulation via thermal and electrical stimuli, achieving modulation depths of 91.8% and 97.3%, respectively.
  • The VO2 layer's phase transition enabled a modulation depth of approximately one order of magnitude.

Conclusions:

  • The proposed multifield-modulated spintronic THz emitter demonstrates high efficiency and tunability.
  • This technology offers a promising pathway for the integration of next-generation on-chip THz sources and modulators.
  • The device's characteristics are well-suited for compact and scalable THz systems.