Title :
Enhanced terahertz emission from ultrathin semiconductor films
Author :
Ramakrishnan, Girish ; Ramanandan, Gopika K. P. ; Adam, A.J.L. ; Planken, Paul C. M.
Author_Institution :
Dept. of Imaging Sci. & Technol., Delft Univ. of Technol.Delft, Delft, Netherlands
Abstract :
Terahertz emission by ultrafast laser excitation of semiconductors is done conventionally in bulk wafers or thin films thicker than the optical penetration depth. Here we present counter-intuitive-results where enhanced terahertz emission is made possible by using ultrathin films of semiconductors.
Keywords :
high-speed optical techniques; laser beam effects; semiconductor thin films; terahertz wave generation; terahertz wave spectra; bulk wafers; counter-intuitive-results; enhanced terahertz emission; optical penetration depth; ultrafast laser excitation; ultrathin semiconductor films; Absorption; Gold; Optical films; Optical pumping; Semiconductor device measurement; Stimulated emission; Ultrafast optics;
Conference_Titel :
Infrared, Millimeter, and Terahertz Waves (IRMMW-THz), 2013 38th International Conference on
Conference_Location :
Mainz
DOI :
10.1109/IRMMW-THz.2013.6665514
