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Related Experiment Video

Updated: May 31, 2026

Fabrication And Characterization Of Photonic Crystal Slow Light Waveguides And Cavities

Fabrication And Characterization Of Photonic Crystal Slow Light Waveguides And Cavities

Published on: November 30, 2012

Negative refraction and lensing at visible wavelength: experimental results using a waveguide array.

José A Ferrari¹, Erna Frins

¹Instituto de Física, Facultad de Ingeniería (UdelaR), Montevideo, Uruguay. jferrari@fing.edu.uy

|July 13, 2011

Summary

This summary is machine-generated.

This study challenges the interpretation of negative refraction and lensing phenomena as evidence for composite left-handed materials. We show these effects in visible light can be explained by classical waveguide optics.

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Area of Science:

Optics and Photonics
Materials Science

Background:

Negative refraction and lensing observed in the microwave-infrared range are often attributed to composite left-handed materials.
Such interpretations rely on experimental evidence that may be subject to alternative explanations.

Purpose of the Study:

To investigate phenomena of negative refraction and lensing at visible wavelengths.
To demonstrate that these effects can arise from classical optical principles, specifically light propagation in waveguide arrays.

Main Methods:

Experimental setup utilizing a waveguide array composed of a tightly packed bundle of glass fibers.
Observation and analysis of light propagation and lensing effects at visible wavelengths within the fiber array.

Main Results:

Experimental demonstration of negative refraction and lensing phenomena at visible wavelengths using a glass fiber waveguide array.
Observed effects are consistent with predictions from classical optics and waveguide theory.

Conclusions:

The observed negative refraction and lensing do not necessitate the existence of left-handed materials.
Classical optic concepts, particularly light propagation in waveguides, provide a sufficient explanation for the experimental results.