Define plasmonics ?

Plasmonics (Simple Definition):

Plasmonics is the study of how light (electromagnetic waves) interacts with the electrons on the surface of metals.

When light hits a metal surface (like gold or silver), the free electrons in the metal can start to vibrate together in waves. These collective vibrations of electrons are called plasmons.

Plasmonics is about using these vibrations to control light at very tiny (nanoscale) levels — much smaller than the wavelength of light itself.

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In Simpler Words:

• Imagine shining light on a metal.

• The electrons on the surface "dance" or oscillate with the light.

• This dance creates special effects that can bend, focus, or enhance light in unique ways.

• That’s plasmonics — the science of using these electron dances to manipulate light.

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✅ Applications:

• Super-fast data transfer (optical circuits)

• Medical sensors (detecting tiny amounts of chemicals/biomolecules)

• Super-resolution imaging (seeing things smaller than light wavelength)