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Two-slab all-optical spring.

Amit Mizrahi1, Levi Schächter

  • 1Department of Electrical Engineering, Technion-IIT, Haifa, Israel. amitmiz@tx.technion.ac.il

Optics Letters
|February 20, 2007
PubMed
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A waveguide with two dielectric slabs acts as an all-optical spring, trapping slabs in stable equilibrium using optical forces. The spring constant depends on slab distance and width, showing a maximal value.

Area of Science:

  • Optics and Photonics
  • Waveguide Theory
  • Nonlinear Optics

Background:

  • Dielectric waveguides are fundamental in photonics.
  • Optical forces can manipulate matter.
  • Evanescent modes play a role in waveguide interactions.

Purpose of the Study:

  • To investigate the all-optical spring behavior of a two-dielectric-slab waveguide.
  • To analyze the stable equilibrium conditions for trapped slabs.
  • To determine the dependence of the spring constant on system parameters.

Main Methods:

  • Theoretical analysis of optical forces in a two-slab waveguide.
  • Guiding a superposition of two transverse evanescent modes.
  • Analytical derivation of stable equilibrium conditions based on wavenumbers.

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Main Results:

  • The two-dielectric-slab waveguide functions as an all-optical spring.
  • Stable transversal trapping of slabs is achieved via optical forces.
  • An analytical condition for stable equilibrium is derived.
  • The spring constant exhibits a maximal value dependent on equilibrium distance and slab width.

Conclusions:

  • A two-dielectric-slab waveguide can exhibit all-optical spring properties.
  • Optical forces enable stable equilibrium and trapping of waveguide components.
  • The system's spring constant is tunable and has an optimal configuration.