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Multi-wavelength and broadband plasmonic switching with V-shaped plasmonic nanostructures on a VO<sub>2</sub>coated plasmonic substrate.

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Plasmonic switches based on VO2as the phase change material.

Kirti Dalal1, Yashna Sharma1

  • 1Department of Electronics and Communication Engineering, Delhi Technological University, Bawana Road, Delhi, 110042, India.

Nanotechnology
|December 15, 2023
PubMed
Summary

This review details advancements in vanadium dioxide (VO2) plasmonic switches, highlighting their ultra-fast switching and applications in photonics. It categorizes switches by activation method (thermal, electrical, optical) across various frequency regions.

Keywords:
phase change materialphase transitionplasmonic switchingplasmonicsvanadium dioxide

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Area of Science:

  • Materials Science
  • Optoelectronics
  • Nanotechnology

Background:

  • Plasmonic switches are crucial for integrated photonics, logic circuits, and computing networks, enabling light routing and switching.
  • Their development is driven by ultra-fast switching speeds, spectral tunability, compact size, and low losses.
  • Vanadium dioxide (VO2) is a key material due to its unique semiconductor-to-metal phase transition.

Purpose of the Study:

  • To provide a comprehensive review of recent advancements in VO2-based plasmonic switches.
  • To discuss the mechanism of the phase transition in VO2 and its advantages over other phase change materials.
  • To categorize and compare state-of-the-art VO2 plasmonic switches developed in the last decade.

Main Methods:

  • Reviewing literature on plasmonic switches based on vanadium dioxide (VO2).
  • Analyzing the semiconductor-to-metal phase transition mechanism in VO2.
  • Categorizing switches based on their activation methods: thermal, electrical, and optical.

Main Results:

  • VO2 exhibits unique properties making it suitable for plasmonic switching applications.
  • A detailed comparison of VO2-based plasmonic switches across different activation methods and frequency regions (visible to terahertz) is presented.
  • Recent advancements in design and development have significantly improved switch performance.

Conclusions:

  • VO2-based plasmonic switches represent a significant advancement in optical switching technologies.
  • The diverse activation methods and spectral tunability of VO2 switches offer broad application potential.
  • Continued research promises further improvements in performance and integration for future photonic devices.