07-03-2010, 08:11 AM
please read
http://esi.nagoya-u.ac.jp/pdf/en__kawase...__1590.pdf
http://en.wikipediawiki/Terahertz_radiation
http://springerengineering/electronics/book/978-1-4419-0977-0
http://rpi.edu/~zhour/Work/Pulsed%20Imag...urdles.pdf