The new technique they've developed is based on a phenomenon observed in metallic structures known as plasmon resonance.
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Oxidation of the metal surface also destroys plasmon resonance conditions ( as the oxide surface is not a metal ).
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The charge motion in a surface plasmon always creates electromagnetic fields outside ( as well as inside ) the metal.
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For example, at optical frequencies, plasmons can couple with a photon to create another quasiparticle called a plasmon polariton.
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Condensed matter theorists have proposed pairing mechanisms based on other attractive interactions such as electron exciton interactions or electron plasmon interactions.
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Plasmon induced transparency an analog of EIT-provides another approach based on the destructive interference between different resonance modes.
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The electric field is stronger at the interface because of the surface plasmon resulting in a non-linear optical effect.
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The word " spaser " is an acronym for " surface plasmon amplification by stimulated emission of radiation ".
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Light hitting such a metamaterial is transformed into surface plasmon polaritons, which are shorter in wavelength than the incident light.
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This leads to observation of the so-called plasmonic nanomotor using the properties of plasmon to make the nanomotor work.
