학술논문
Generation of Terahertz Radiation by Interaction of Intense Femtosecond Laser Pulses with a Metal Surface.
Document Type
Article
Author
Source
Subject
*SUBMILLIMETER waves
*FEMTOSECOND lasers
*LASER pulses
*METALLIC surfaces
*OPTICAL reflection
*OPTICAL polarization
*
*
*
*
*
Language
ISSN
0033-8443
Abstract
We present the results of experimental and theoretical studies of generation of terahertz radiation during reflection of a femtosecond-long laser pulse from a metal surface. It is shown that a greater part of the experimental results (narrow directivity of the terahertz waves and dependence of its energy on the polarization and incidence angle of the laser radiation) can be interpreted within the model of Čerenkov radiation. Some new features of generation of terahertz radiation are considered, which appear during an optical breakdown of the medium near the metal surface. Structural changes in the terahertz signal, which take place in the process of formation of the near-surface plasma, are studied. [ABSTRACT FROM AUTHOR]