Journal
PHYSICAL REVIEW LETTERS
Volume 104, Issue 22, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.104.223901
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Funding
- Engineering and Physical Sciences Research Council, U.K.
- Royal Society
- European Community
- Engineering and Physical Sciences Research Council [EP/G060363/1, EP/G00515X/1] Funding Source: researchfish
- EPSRC [EP/G00515X/1, EP/G060363/1] Funding Source: UKRI
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We report on the first direct experimental demonstration of a collective phenomenon in metamaterials: spectral line collapse with an increasing number of unit cell resonators (metamolecules). This effect, which is crucial for achieving a lasing spaser, a coherent source of optical radiation fuelled by coherent plasmonic oscillations in metamaterials, is linked to the suppression of radiation losses in periodic arrays. We experimentally demonstrate spectral line collapse at microwave, terahertz and optical frequencies.
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