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Related Concept Videos

Propagation of Waves01:07

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When a wave propagates from one medium to another, part of it may get reflected in the first medium, and part of it may get transmitted to the second medium. In such a case, the interface of the two mediums can be considered as a boundary that is neither fixed nor free.
Consider a scenario where a wave propagates from a string of low linear mass density to a string of high linear mass density. In such a case, the reflected wave is out of phase with respect to the incident wave, however the...
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Enhancing Optical Forces in InP-Based Waveguides.

Mohammad Esmail Aryaee Panah1, Elizaveta S Semenova2, Andrei V Lavrinenko2

  • 1Technical University of Denmark, Department of Photonics Engineering, Ørsteds Plads, Building 343, DK-2800 Kgs, Lyngby, Denmark. mesm@fotonik.dtu.dk.

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|June 10, 2017
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Summary
This summary is machine-generated.

This study explores optically induced forces on indium phosphide (InP) micro-cantilevers, achieving significant force amplification through surface plasmon polaritons and phonon excitation for advanced microelectromechanical systems (MEMS). The findings enable all-optical control and miniaturization of MEMS devices.

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Area of Science:

  • Photonics and Materials Science
  • Microelectromechanical Systems (MEMS)

Background:

  • Silicon dominates Microelectromechanical Systems (MEMS) fabrication, yet unique material properties are underutilized.
  • Indium phosphide (InP) offers distinct optical and electronic properties suitable for advanced MEMS applications.

Purpose of the Study:

  • Investigate optically induced forces on a semi-insulating InP waveguide over a doped InP:Si substrate.
  • Explore force amplification in epsilon-near-zero (ENZ), surface plasmon polariton (SPP), and phonon excitation regimes.
  • Demonstrate all-optical control and tunability for MEMS device design.

Main Methods:

  • Optical actuation of a suspended InP waveguide above an InP:Si substrate.
  • Analysis of forces in ENZ, SPP, and phonon excitation regimes.
  • Detection of induced deflection via light phase change for all-optical feedback.

Main Results:

  • Observed order-of-magnitude force amplification with SPP excitation.
  • Achieved three orders of magnitude force amplification in the phonon excitation regime.
  • Demonstrated repulsive forces in the ENZ regime, enhanced by the InP:Si substrate's low losses.

Conclusions:

  • Optically induced forces in InP systems offer significant amplification for MEMS.
  • All-optical detection and tunability enable miniaturization and integration of micro-cantilevers.
  • InP:Si substrates provide a promising platform for advanced, optically controlled MEMS devices.