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Related Experiment Videos

Large positive and negative lateral optical beam shift in prism-waveguide coupling system.

Xuanbin Liu1, Zhuangqi Cao, Pengfei Zhu

  • 1Department of Physics, Shanghai Jiao Tong University, China.

Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics
|June 29, 2006
PubMed
Summary

This study explores lateral optical beam shifts in prism-waveguide systems. Large positive and negative shifts are achievable, influenced by damping factors, with potential for millimeter-scale displacement.

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Area of Science:

  • Optics and Photonics
  • Waveguide Theory
  • Nanophotonics

Background:

  • Prism-waveguide coupling is crucial for optical devices.
  • Understanding lateral beam shifts is key to controlling light propagation.
  • Existing models may not fully capture damping effects on beam displacement.

Purpose of the Study:

  • To theoretically investigate lateral beam shifts in prism-waveguide systems.
  • To derive a formula for analyzing beam shift behavior.
  • To explore conditions for achieving large positive and negative beam shifts.

Main Methods:

  • Theoretical analysis of prism-waveguide coupling.
  • Derivation of a simplified formula for lateral beam shift.
  • Numerical calculations to validate theoretical findings.

Related Experiment Videos

  • Examination of wavelength effects from visible to near-infrared spectrum.

    • Main Results:

    • A simple theoretical formula for lateral beam shift was derived.
    • Large positive and negative lateral optical beam shifts are demonstrated upon guided mode excitation.
    • Beam shift magnitude is strongly correlated with intrinsic and radiative damping.
    • Negative lateral beam shift occurs when intrinsic damping exceeds radiative damping.
    • Numerical simulations confirm the theory, showing potential for millimeter-scale beam shifts.

    Conclusions:

    • The derived formula accurately predicts lateral beam shifts.
    • Damping parameters critically influence the direction and magnitude of beam shifts.
    • Prism-waveguide systems offer tunability for significant optical beam displacement.