Accession Number:

ADP007631

Title:

Femtosecond Pulses of Terahertz Radiation: Physics and Applications,

Descriptive Note:

Corporate Author:

IBM THOMAS J WATSON RESEARCH CENTER YORKTOWN HEIGHTS NY

Personal Author(s):

• Grischkowsky, D.
• Katzenellenbogen, N.

Report Date:

1992-05-22

Pagination or Media Count:

6.0

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