The link _^^_ doesn't work for me.ZapperZ said:http://www.physicstoday.org/vol-57/iss-6/pdf/vol57no6p37_43.pdf
Zz.
dlgoff said:When I downloaded the pdf, I got an error message from Acrobat 4.0 not being able to open the file.
A negative index of refraction is a property of a material where the direction of light propagation is opposite to the direction of energy flow. This means that light is bent in the opposite direction when passing through the material, compared to how it would bend in a normal material.
A negative index of refraction is measured using a technique called ellipsometry. This involves measuring the change in polarization of light as it passes through a material. The degree of change in polarization can be used to calculate the index of refraction.
Materials with a negative index of refraction are known as metamaterials. These are artificially engineered materials that have unique properties not found in natural materials. Some examples of materials that exhibit a negative index of refraction are photonic crystals, plasmonic materials, and chiral media.
Negative index of refraction has potential applications in various fields such as optics, telecommunications, and medical imaging. It can be used to create superlenses that can image objects at a resolution beyond the diffraction limit, and also to develop compact and efficient optical devices.
One of the main challenges in utilizing negative index of refraction is the difficulty in creating materials with a negative index of refraction at visible wavelengths. Most materials that exhibit a negative index of refraction only do so in the infrared range, making it challenging to apply in everyday devices. Additionally, the fabrication of metamaterials with desired properties can be complex and expensive.