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Interference and Diffraction

Interference is a characteristic phenomenon exhibited by waves. When two electromagnetic waves interact with their peaks and troughs coinciding, a resulting wave with enhanced amplitude is produced. This is known as constructive interference. In this case, the two waves interacting are in phase with each other.

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Updated: May 8, 2026

Fabrication And Characterization Of Photonic Crystal Slow Light Waveguides And Cavities
11:08

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Published on: November 30, 2012

Fluid tunable transition from trapping to discrete diffraction in waveguide arrays.

Eike Zeller1, Geethaka C Devendra, Thach G Nguyen

  • 1School of Electrical and Computer Engineering and Centre for Ultra-high bandwidth Devices for Optical Systems (CUDOS), RMIT University, Melbourne, VIC 3001, Australia.

Optics Express
|August 14, 2013
PubMed
Summary
This summary is machine-generated.

We developed a fluid-tunable polymer waveguide array that controls light trapping and diffraction. This platform enables tunable optical transitions and shows potential for label-free refractive index sensing.

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11:08

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Published on: November 30, 2012

Using Microwave and Macroscopic Samples of Dielectric Solids to Study the Photonic Properties of Disordered Photonic Bandgap Materials
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Terahertz Microfluidic Sensing Using a Parallel-plate Waveguide Sensor
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Area of Science:

  • Optics and Photonics
  • Materials Science
  • Biomedical Engineering

Background:

  • Waveguide arrays are crucial for integrated optics.
  • Controlling light propagation in waveguide arrays is essential for optical devices.
  • Optofluidic platforms offer dynamic control over optical properties.

Purpose of the Study:

  • To engineer an optofluidic polymer waveguide array platform.
  • To demonstrate fluid-tunable transition between light trapping and discrete diffraction.
  • To explore the platform's potential for refractive index sensing.

Main Methods:

  • Fabrication of a planar polymer waveguide array.
  • Integration with a fluidic system for refractive index control.
  • Optical characterization of light propagation and spectral transitions.

Main Results:

  • Demonstrated a wavelength-dependent transition from localized light trapping to delocalized discrete diffraction.
  • Showcased spectral control of this transition via fluid refractive index variation.
  • Confirmed platform compatibility with aqueous solutions.

Conclusions:

  • The developed optofluidic platform enables tunable optical transitions in waveguide arrays.
  • The spectral tunability makes it suitable for integrated refractive index sensing.
  • Potential applications in label-free biosensing using optical detection.