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 


Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.


  1. 1.
    Ch. Fattinger and D. Grischkowsky, Terahertz beams, Appl. Phys. Lett. 54: 490 (1989).ADSCrossRefGoogle Scholar
  2. 2.
    B.B. Hu, J.T. Darrow, X.-C. Zhang, and D.H. Auston, Optically steerable photoconducting antennas, Appl. Phys. Lett. 56: 886 (1990).ADSCrossRefGoogle Scholar
  3. 3.
    X.-C. Zhang and D.H. Auston, Generation of steerable submillimeter waves from semiconductor surfaces by spatial light modulators, Appl. Phys. Lett. 59: 768 (1991).ADSCrossRefGoogle Scholar
  4. 4.
    X.-C. Zhang, and D. H. Auston, Optoelectric measurement of semiconductor surfaces and interfaces with femtosecond optics, J. Appl. Phys. 71: 326 (1992).ADSCrossRefGoogle Scholar
  5. 5.
    Justin T. Darrow, Xi-Cheng Zhang, David H. Auston, and Jeffrey D. Morse, Saturation properties of large-aperture photoconducting antennas, J. of Quantum Electronics, 28: 1607 (1992).ADSCrossRefGoogle Scholar
  6. 6.
    D. You, R.R. Jones, P.H. Bucksbaum, and D.R. Dykaar, Generation of high-power sub-single-cycle 500-fs electromagnetic pulses, Opt. Lea. 18: 290 (1993).ADSCrossRefGoogle Scholar
  7. 7.
    P.K. Benicewicz, J.P. Roberts, and A.J. Taylor, Scaling of terahertz radiation from large-aperture biased photoconductors, J. Opt. Soc. Am. B, 11:2533 (1994).Google Scholar
  8. 8.
    D.W. Liu, J.B. Thaxter, and D.F. Bliss, Gigahertz planar photoconducting antenna activated by picosecond optical pulses, Opt. Lett. 20: 1544 (1995).ADSCrossRefGoogle Scholar
  9. 9.
    R.A. Cheville and D. Grischkowsky, Far-infrared terahertz time-domain spectroscopy of flames, Opt. Lett. 20: 1646 (1995).ADSCrossRefGoogle Scholar
  10. 10.
    B.I. Greene, P.N. Saeta, Douglas R. Dykaar, S. Schmitt-Rink, and Shun Lien Chuang, Far-infrared light generation at semiconductor surfaces and its spectroscopic applications, IEEE J. of Quantum Electron. 28: 2302 (1992).ADSCrossRefGoogle Scholar
  11. 11.
    B.B. Hu, and M.C. Nuss, Imaging with terahertz waves, Opt. Lett. 20: 1716 (1996).ADSCrossRefGoogle Scholar
  12. 12.
    Gerald L. Witt, Optoelectronic properties of low-temperature III-Vs, in: Proceedings of LEOS’94, 7th Annual Meeting, 2:19 (1994).Google Scholar
  13. 13.
    Jagdeep Shah, Benoit Deveaud, T.C. Damen, W.T. Tsang, A.C. Gossard and P. Lugli, Determination of intervalley scattering rates in GaAs by subpicosecond luminescence spectroscopy, Phys. Rev. Lett. 59: 2222 (1987).ADSCrossRefGoogle Scholar
  14. 14.
    G.M. Wysin, D.L. Smith, and Antonio Redondo, Picosecond response of photoexcited GaAs in a uniform electric field by Monte Carlo dynamics, Phys. Rev. B, 38: 12514 (1988).ADSCrossRefGoogle Scholar
  15. 15.
    Edwin A. Marengo, Anthony J. Devaney, and Ehud Heyman, Analysis and characterization of ultrawideband scalar volume sources and the field they radiate, to be published in IEEE Trans. Ant. & Propag. (1996).Google Scholar

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

Personalised recommendations