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Related Experiment Video

Updated: Jul 10, 2025

Utilization of Plasmonic and Photonic Crystal Nanostructures for Enhanced Micro- and Nanoparticle Manipulation
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Temperature-Controlled Switchable Photonic Nanojet Generated by Truncated Cylindrical Structure.

Ning Su1, Weiming Zhang1, Xintao Zeng1

  • 1Key Laboratory of Information Functional Material for Fujian Higher Education, Quanzhou Normal University, Quanzhou 362000, China.

Materials (Basel, Switzerland)
|November 25, 2023
PubMed
Summary
This summary is machine-generated.

A novel micro-nano structure using vanadium dioxide (VO2) acts as a photonic nanojet (PNJ) switch, controllable by temperature. This temperature-tuned PNJ offers tunable optical properties for advanced applications.

Keywords:
finite-difference time-domain (FDTD)photonic nanojet (PNJ)vanadium dioxide (VO2)

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Area of Science:

  • Photonics and Nanotechnology
  • Materials Science

Background:

  • Photonic nanojets (PNJs) are highly directional light beams with subwavelength dimensions.
  • Controlling PNJ characteristics is crucial for applications in optical manipulation and sensing.

Purpose of the Study:

  • To propose and investigate a novel micro-nano structure for temperature-controlled photonic nanojet (PNJ) switching.
  • To analyze the impact of temperature on key PNJ parameters like strength, FWHM, working distance, and focal length.

Main Methods:

  • Utilized a truncated cylinder coated with a vanadium dioxide (VO2) thin film.
  • Employed the finite-difference time-domain (FDTD) method to simulate and study PNJ properties under varying temperatures.

Main Results:

  • Demonstrated temperature-induced switching of the PNJ, enabling "on" and "off" states.
  • Observed tunable PNJ characteristics at both high and low temperatures.
  • Achieved a maximum intensity ratio of the PNJ up to 7.25.

Conclusions:

  • The proposed VO2-coated micro-nano structure offers a viable method for active PNJ control.
  • This temperature-responsive PNJ switch has significant potential for optical manipulation, sensing, microscopy, and optoelectronic devices.