Optically-Excited Photoconducting Antennas for Generating Ultra-Wideband Pulses

  • David W. Liu
  • Paul H. Carr


The generation of free-space ultrawideband (UWB) short-pulse (SP) electromagnetic radiation by laser pulses has been investigated vigorously in the past few years 1–8. A variety of applications have been developed out of this innovative technique in the terahertz regime, such as, spectroscopic characterization of materials in the far-infrared region 9, transient nonlinear properties of dielectric materials at the submillimeter wavelengths 10, novel methods for characterizing semiconductor surfaces and interfaces 4, and very recently, terahertz time-domain imaging due to highly frequency-dependent absorption and dispersion for most chemicals 11. When the photoconducting antennas are used in impulse radar communication and IFF system, the gigahertz (GHz) range is more applicable than the terahertz (THz), as electronic instrumentation is more mature.


Optical Pulse Bias Field Microwave Pulse Microwave Signal Electric Field Amplitude 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


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Copyright information

© Springer Science+Business Media New York 1997

Authors and Affiliations

  • David W. Liu
    • 1
  • Paul H. Carr
    • 1
  1. 1.Rome LaboratoryElectromagnetics and Reliability Directorate (RL/ERAC)Hanscom AFBUSA

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