Accession Number : ADP007631

Title :   Femtosecond Pulses of Terahertz Radiation: Physics and Applications,

Corporate Author : IBM THOMAS J WATSON RESEARCH CENTER YORKTOWN HEIGHTS NY

Personal Author(s) : Grischkowsky, D. ; Katzenellenbogen, N.

Report Date : 22 MAY 1992

Pagination or Media Count : 6

Abstract : The use of high-performance, Hertzian-dipole antennas has enabled us to extend the operation of our optoelectronic, pulsed THz beam system to beyond 3 THz and to thereby, determine the limiting time-domain response function of the photoconductive switch. Via this capability, we have characterized a new type of THz source producing 380 fsec pulses, the shortest directly measured THz pulses in free space to date. A high-brightness pulsed THz beam system has been recently developed (1 ). This optoelectronic system is based on repetitive, fsec optical excitation of a Hertzian dipole antenna (1,2) embedded in a charged coplanar transmission line structure.

Descriptors :   *DIPOLE ANTENNAS, *ELECTROOPTICS, *OPTICAL DETECTION, ANTENNAS, BRIGHTNESS, DIPOLES, EXCITATION, PULSES, RESPONSE, STRUCTURES, SWITCHES, TIME DOMAIN, TRANSMISSION LINES, PHOTOCONDUCTIVITY, LASER BEAMS, FREQUENCY, ELECTROMAGNETIC RADIATION, SYMPOSIA.

Subject Categories : Electrooptical and Optoelectronic Devices
      Optical Detection and Detectors

Distribution Statement : APPROVED FOR PUBLIC RELEASE