Light Well: A Tunable Free-Electron Light Source on a Chip
Abstract
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 20-40 keV range are injected into gold-silica well structures with a lateral size of just a few hundred nanometers.
- Publication:
-
Physical Review Letters
- Pub Date:
- September 2009
- DOI:
- 10.1103/PhysRevLett.103.113901
- arXiv:
- arXiv:0907.2143
- Bibcode:
- 2009PhRvL.103k3901A
- Keywords:
-
- 42.72.-g;
- 78.67.-n;
- Optical sources and standards;
- Optical properties of low-dimensional mesoscopic and nanoscale materials and structures;
- Condensed Matter - Mesoscale and Nanoscale Physics;
- Physics - Optics
- E-Print:
- 4 pages, 3 figures