![]() ![]() ![]() Engaging the trapped mode produces a narrow-diversion spatially coherent beam of radiation and substantially reduces the gain threshold compare to other gain-assisted solutions based on common electric and magnetic dipolar modes, including nanoshell 12 and horseshoe 13 plasmonic resonators. An example of such mode is the anti-symmetric plasmon oscillations excited in weakly asymmetric split-ring resonators, the so-called trapped mode 11. This mode has the lowest dipole scattering loss when all resonators in the array oscillate in phase. The key element of the lasing spaser is a plasmonic metamaterial, a two-dimensional array of plasmonic nano-resonators, which can support a high- Q collective and low radiation mode of excitation. In a further development of the spaser concept the stimulated plasmonic oscillations were suggested to power up a nanoscale source of coherent radiation, the lasing spaser 10. 3 and references therein) culminated by a recent demonstration of the nano-particle-based spaser 4, plasmonic laser 5, 6, 7 and electrically pumped nanolaser 8, 9. Since, there has been a surge of activity in this field, both theoretical and experimental 3 (see Ref. It was introduced by Bergman and Stockman in 2003 1, 2 as a nano-plasmonic counterpart of a laser that could generate intense coherent plasmonic fields and feed nanoscale plasmonic circuits. Spaser is a quantum amplifier of surface plasmons based on stimulated emission of radiation. ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |