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

Nanotechnology·2024

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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.

|December 15, 2023

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 material phase transition plasmonic switching plasmonics vanadium 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.