Light well: A tunable free-electron light source on a chip

G. Adamo, K. F. MacDonald, Y. H. Fu, C. M. Wang, D. P. Tsai, F. J. García De Abajo, N. I. Zheludev

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The passage of a free-electron beam through a nanohole in a periodically layered metal-dielectric structure creates a new type of tunable, nanoscale radiation source-a "light well". In the reported demonstration, tunable light is generated at an intensity of ∼200W/cm2 as electrons with energies in the 20-40keV range are injected into gold-silica well structures with a lateral size of just a few hundred nanometers.

Original languageEnglish
Article number113901
JournalPhysical Review Letters
Issue number11
StatePublished - 9 Sep 2009


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