OSA's Digital Library

Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 42, Iss. 18 — Jun. 20, 2003
  • pp: 3678–3683

Carrier dynamics of terahertz emission from low-temperature-grown GaAs

Dongfeng Liu and Jiayin Qin  »View Author Affiliations


Applied Optics, Vol. 42, Issue 18, pp. 3678-3683 (2003)
http://dx.doi.org/10.1364/AO.42.003678


View Full Text Article

Enhanced HTML    Acrobat PDF (122 KB)





Browse Journals / Lookup Meetings

Browse by Journal and Year


   


Lookup Conference Papers

Close Browse Journals / Lookup Meetings

Article Tools

Share
Citations

Abstract

Through theoretical modeling, we find that the dynamics of photogenerated carriers play a very important role in shaping the temporal waveform of terahertz (THz) radiation pulses emitted from biased low-temperature (LT)-grown GaAs antenna. Our modeling gives successful analyses for the sharp and short, slow and long negative parts of temporal THz waveforms. By including intraband, carrier relaxation effects in the modeled mobility, we find an obvious dependence of the THz conversion efficiency on the material of THz emitter and experimental parameters such as the optical duration, the center wavelength, and the fluence of the laser pulses. Our research also shows that electron-hole and electron-electron collisions in LT-GaAs contribute to the saturation phenomenon with an increase of laser fluence.

© 2003 Optical Society of America

OCIS Codes
(140.3070) Lasers and laser optics : Infrared and far-infrared lasers
(260.2110) Physical optics : Electromagnetic optics
(300.6470) Spectroscopy : Spectroscopy, semiconductors
(320.7090) Ultrafast optics : Ultrafast lasers

History
Original Manuscript: November 20, 2002
Revised Manuscript: March 14, 2003
Published: June 20, 2003

Citation
Dongfeng Liu and Jiayin Qin, "Carrier dynamics of terahertz emission from low-temperature-grown GaAs," Appl. Opt. 42, 3678-3683 (2003)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-42-18-3678


Sort:  Author  |  Year  |  Journal  |  Reset  

References

  1. D. Grischkowsky, S. Keiding, M. van Exter, Ch. Fattinger, “Far-infrared time-domain spectroscopy with terahertz beams of dielectrics and semiconductors,” J. Opt. Soc. Am. B 7, 2006–2015 (1990). [CrossRef]
  2. M. Schall, P. U. Jepsen, “Photoexcited GaAs surfaces studied by transient terahertz time-domain spectroscopy,” Opt. Lett. 25, 13–15 (2000). [CrossRef]
  3. H. Nemec, A. Pashkin, P. Kuzel, M. Khazan, S. Schnull, I. Wilke, “Carrier dynamics in low-temperature grown GaAs studied by THz emission spectroscopy,” J. Appl. Phys. 90, 1303–1317 (2001). [CrossRef]
  4. T.-I. Jeon, D. R. Grischkowsky, “Observation of a Cole-Davidson type complex conductivity in the limit of very low carrier densities in doped silicon,” Applied. Phys. Lett. 72, 2259–2261 (1998). [CrossRef]
  5. M. van Exter, D. R. Grischkowsky, “Characterization of an optoelectronic terahertz beam system,” IEEE Trans. Microwave Theory Tech. 38, 1684–1691 (1990). [CrossRef]
  6. D.-M. Mittleman, R. H. Jacobsen, M. C. Nuss, “T-ray imaging,” IEEE J. Sel. Top. Quantum Electron. 2, 679–692 (1996). [CrossRef]
  7. S. Hunsche, M. Koch, I. Brener, M. C. Nuss, “THz near-field imaging,” Opt. Commun. 150, 22–26 (1998). [CrossRef]
  8. M. Stellmacher, J.-P. Schnell, D. Adam, J. Nagle, “Photoconductivity investigation of the electron dynamics in GaAs grown at low temperature,” Appl. Phys. Lett. 74, 1239–1241 (1999). [CrossRef]
  9. A. Krotkus, L. Dapkus, U. Olin, S. Marcinkevicius, “Ultrafast carrier trapping in Be-doped low-temperature-grown GaAs,” Appl. Phys. Lett. 75, 3336–3339 (1999). [CrossRef]
  10. A. Gurtler, C. Winnewisser, H. Helm, P. U. Jepsen, “Terahertz pulse propagation in the near field and the far field,” J. Opt. Soc. Am. A 17, 74–83 (2000). [CrossRef]
  11. E. Budiarto, N.-W. Pu, S. Jeong, J. Bokor, “Near-field propagation of terahertz pulses from a large-aperture antenna,” Opt. Lett. 23, 213–215 (1998). [CrossRef]
  12. P. U. Jepsen, R. H. Jacobsen, S. R. Keiding, “Generation and detection of terahertz pulse from biased semiconductor antennas,” J. Opt. Soc. Am. B 13, 2424–2436 (1996). [CrossRef]
  13. P. K. Benicewicz, J. P. Roberts, A. J. Taylor, “Scaling of terahertz radiation from large-aperture biased photoconductors,” J. Opt. Soc. Am. B 11, 2533–2546 (1994). [CrossRef]
  14. A. J. Taylor, P. K. Benicewicz, S. M. Young, “Modeling of femtosecond electromagnetic pulses from large-aperture photoconductors,” Opt. Lett. 18, 1340–1342 (1993). [CrossRef] [PubMed]
  15. D. You, R. R. Jones, P. H. Bucksbaum, D. R. Dykaar, “Generation of high-power sub-single-cycle 500-fs electromagnetic pulses,” Opt. Lett. 18, 290–292 (1993). [CrossRef] [PubMed]
  16. J. T. Darrow, X.-C. Zhang, D. H. Auston, J. D. Morse, “Saturation properties of large-aperture photoconducting antennas,” IEEE J. Quantum Electron. 28, 1607–1616 (1992). [CrossRef]
  17. K.-H. Hellwege, O. Madelung, eds., Landolt-Bornstein, Vol. 17a of Semiconductors, Physics of Group IV elements and III-V Compounds (Springer-Verlag, New York, 1982).
  18. B. I. Greene, P. N. Saete, D. R. Dykaar, S. Schmitt-Rink, S. L. Chung, “Far-infrared light generation at semiconductor surfaces and its spectroscopic applications,” IEEE J. Quantum Electron. 28, 2302–2312 (1992). [CrossRef]
  19. P. N. Saeta, J. F. Federici, B. I. Greene, D. R. Dykaar, “Intervalley scattering in GaAs and InP probed by pulsed far-infrared transmission spectroscopy,” Appl. Phys. Lett. 60, 1477–1479 (1992). [CrossRef]
  20. S.-G. Park, A. M. Weiner, M. R. Melloch, C. W. Siders, J. L. W. Siders, A. J. Taylor, “High-power narrow-band terahertz generation using large-aperture photoconductors,” IEEE J. Quantum Electron. 35, 1257–1267 (1999). [CrossRef]
  21. S.-G. Park, M. R. Melloch, A. M. Weiner, “Analysis of terahertz waveforms measured by photoconductive and electrooptic sampling,” IEEE J. Quantum Electron. 35, 810–819 (1999). [CrossRef]
  22. X.-C. Zhang, D. H. Austonm, “Optoelectronic measurement of semiconductor surfaces and interface with femtosecond optics,” J. Appl. Phys. 71, 326–338 (1991). [CrossRef]

Cited By

Alert me when this paper is cited

OSA is able to provide readers links to articles that cite this paper by participating in CrossRef's Cited-By Linking service. CrossRef includes content from more than 3000 publishers and societies. In addition to listing OSA journal articles that cite this paper, citing articles from other participating publishers will also be listed.


« Previous Article  |  Next Article »

OSA is a member of CrossRef.

CrossCheck Deposited