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Related Experiment Video

Updated: Feb 9, 2026

Electrospray Deposition of Uniform Thickness Ge23Sb7S70 and As40S60 Chalcogenide Glass Films
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A reprogrammable multifunctional chalcogenide guided-wave lens.

Tun Cao1, Chen-Wei Wei, Meng-Jia Cen

  • 1School of Optoelectronic Engineering and Instrumentation Science, Dalian University of Technology, 116024, China. caotun1806@dlut.edu.cn.

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|June 6, 2018
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Summary
This summary is machine-generated.

This study introduces a reconfigurable guided-wave lens using transformation optics and phase-change materials. This innovation enables ultrafast, versatile control of light for applications like cloaking and advanced lensing.

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Area of Science:

  • Optics and Photonics
  • Materials Science
  • Wave Manipulation

Background:

  • Transformation optics (TO) enables wave manipulation by mimicking curved spacetime.
  • Current TO methods face limitations in broadband performance, reconfigurability, and reprogrammable functions due to extreme parameters and static nature.

Purpose of the Study:

  • To develop a reconfigurable multi-mode guided-wave lens.
  • To overcome the limitations of static transformation optics using active materials.
  • To achieve ultrafast reconfigurability and versatile functions for visible light manipulation.

Main Methods:

  • Integration of transformation optics with an active phase-change chalcogenide (Ge2Sb2Te5).
  • Fabrication of a Rinehart-shaped curved waveguide with a tunable refractive index gradient.
  • Utilizing partial crystallization of Ge2Sb2Te5 triggered by electrical bias for refractive index modulation.

Main Results:

  • Demonstration of an electrically reprogrammable multi-mode guided-wave lens.
  • Achieved ultrafast response times for dynamic functional reconfiguration.
  • Tunable refractive index gradient profile enabling various optical functions.

Conclusions:

  • The developed lens offers a transformative platform for versatile guided-wave manipulation.
  • This approach provides a universal method for ultrafast and highly adaptable light control.
  • Potential applications include dynamic Einstein rings, cloaking devices, Maxwell fish-eye, and Luneburg lenses.