Nanoplasmonics from attoseconds to terahertz

A noninvasive access to the nanoplasmonic collective dynamics, with nanometer-scale spatial resolution and temporal resolution on the order of 100 attoseconds is described. The principal limits for the nanoconcentration of the THz radiation in metal/dielectric waveguides is established and the optimum shapes required for this nanoconcentration is determined. The adiabatic compression of THz radiation from the initial spot size of a hundred microns to the final size of R = 100-250 nm can be achieved. This will find a wide spectrum of applications in science, engineering, biomedical research, environmental monitoring, and defense.