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Optics Express

Optics Express

  • Editor: Andrew M. Weiner
  • Vol. 21, Iss. 12 — Jun. 17, 2013
  • pp: 13930–13937

Saturation of the free carrier absorption in ZnTe crystals

S. A. Ku, C. M. Tu, W.-C. Chu, C. W. Luo, K. H. Wu, A. Yabushita, C. C. Chi, and T. Kobayashi  »View Author Affiliations


Optics Express, Vol. 21, Issue 12, pp. 13930-13937 (2013)
http://dx.doi.org/10.1364/OE.21.013930


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Abstract

This study systematically investigates the influence of free carriers on the generation of THz in ZnTe crystals, over a wide range of pumping fluences. As the pumping fluence is increased (< 6.36 mJ/cm2), the concentration of free carriers gradually increases and the THz output power is saturated, as clearly demonstrated by the time delay in the THz temporal waveforms, the changes in the THz spectral weight and the red-shift in the PL spectra. For high pumping fluences (> 6.36 mJ/cm2), spectacularly, there is a significant quadratic increase in the THz output power when the pumping fluence is increased, as well as at low pumping fluences of < 0.58 mJ/cm2, because of the saturation of free carriers.

© 2013 OSA

OCIS Codes
(190.7110) Nonlinear optics : Ultrafast nonlinear optics
(260.3090) Physical optics : Infrared, far

ToC Category:
Nonlinear Optics

History
Original Manuscript: March 19, 2013
Revised Manuscript: May 27, 2013
Manuscript Accepted: May 27, 2013
Published: June 3, 2013

Citation
S. A. Ku, C. M. Tu, W.-C. Chu, C. W. Luo, K. H. Wu, A. Yabushita, C. C. Chi, and T. Kobayashi, "Saturation of the free carrier absorption in ZnTe crystals," Opt. Express 21, 13930-13937 (2013)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-21-12-13930


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References

  1. B. Ferguson and X.-C. Zhang, “Materials for terahertz science and technology,” Nat. Mater.1(1), 26–33 (2002). [CrossRef] [PubMed]
  2. E. G. Sun, W. Ji, and X.-C. Zhang, “Two-photon absorption induced saturation of THz radiation in ZeTe,” Proceedings of the Conference on Lasers Electro-Optics, OSA, 2000, 479–480.
  3. V. Y. Gaivoronsky, M. M. Nazarov, D. A. Sapozhnikov, Y. V. Shepelyavyi, S. A. Shkel’nyuk, A. P. Shkurinov, and A. V. Shuvaev, “Competition between linear and nonlinear processes during generation of pulsed terahertz radiation in a ZnTe crystal,” Quantum Electron.35(5), 407–414 (2005). [CrossRef]
  4. M. C. Hoffmann, K.-L. Yeh, J. Hebling, and K. A. Nelson, “Efficient terahertz generation by optical rectification at 1035 nm,” Opt. Express15(18), 11706–11713 (2007). [CrossRef] [PubMed]
  5. S. M. Harrel, R. L. Milot, J. M. Schleicher, and C. A. Schmuttenmaer, “Influence of free-carrier absorption on terahertz generation from ZnTe (110),” J. Appl. Phys.107(3), 033526 (2010). [CrossRef]
  6. S. Vidal, J. Degert, M. Tondusson, J. Oberlé, and E. Freysz, “Impact of dispersion, free carriers, and two-photon absorption on the generation of intense terahertz pulses in ZnTe crystals,” Appl. Phys. Lett.98(19), 191103 (2011). [CrossRef]
  7. T. Löffler, T. Hahn, M. Thomson, F. Jacob, and H. G. Roskos, “Large-area electro-optic ZnTe terahertz emitters,” Opt. Express13(14), 5353–5362 (2005). [CrossRef] [PubMed]
  8. F. Blanchard, L. Razzari, H.-C. Bandulet, G. Sharma, R. Morandotti, J.-C. Kieffer, T. Ozaki, M. Reid, H. F. Tiedje, H. K. Haugen, and F. A. Hegmann, “Generation of 1.5 microJ single-cycle terahertz pulses by optical rectification from a large aperture ZnTe crystal,” Opt. Express15(20), 13212–13220 (2007). [CrossRef] [PubMed]
  9. A. A. Said, M. Sheik-Bahae, D. J. Hagan, T. H. Wei, J. Wang, J. Young, and E. W. Van Stryland, “Determination of bound-electronic and free-carrier nonlinearities in ZnSe, GaAs, CdTe, and ZnTe,” J. Opt. Soc. Am. B9(3), 405–414 (1992). [CrossRef]
  10. M. Schall and P. U. Jepsen, “Above-band gap two-photon absorption and its influence on ultrafast carrier dynamics in ZnTe and CdTe,” Appl. Phys. Lett.80(25), 4771–4773 (2002). [CrossRef]
  11. C.-M. Tu, S. A. Ku, W.-C. Chu, C. W. Luo, J.-C. Chen, and C.-C. Chi, “Pulsed terahertz radiation due to coherent phonon-polariton excitation in <110> ZnTe Crystal,” J. Appl. Phys.112(9), 093110 (2012). [CrossRef]
  12. H. Wang, K. S. Wong, B. A. Foreman, Z. Y. Yang, and G. K. L. Wong, “One-and two-photon-excited time-resolved photoluminescence investigations of bulk and surface recombination dynamics in ZnSe,” J. Appl. Phys.83(9), 4773–4776 (1998). [CrossRef]
  13. J. D. Ye, S. L. Gu, S. M. Zhu, S. M. Liu, Y. D. Zheng, R. Zhang, and Y. Shi, “Fermi-level band filling and band-gap renormalization in Ga-doped ZnO,” Appl. Phys. Lett.86(19), 192111 (2005). [CrossRef]
  14. J. Liu, G. Kaur, and X.-C. Zhang, “Photoluminescence quenching dynamics in cadmium telluride and gallium arsenide induced by ultrashort terahertz pulse,” Appl. Phys. Lett.97(11), 111103 (2010). [CrossRef]
  15. M. C. Hoffmann and D. Turchinovich, “Semiconductor saturable absorbers for ultrafast terahertz signals,” Appl. Phys. Lett.96(15), 151110 (2010). [CrossRef]
  16. M. Nagai, M. Jewariya, Y. Ichikawa, H. Ohtake, T. Sugiura, Y. Uehara, and K. Tanaka, “Broadband and high power terahertz pulse generation beyond excitation bandwidth limitation via χ(2) cascaded processes in LiNbO3,” Opt. Express17(14), 11543–11549 (2009). [CrossRef] [PubMed]
  17. D. Turchinovich and M. C. Hoffmann, “Self-phase modulation of a single-cycle terahertz pulse by nonlinear free-carrier response in a semiconductor,” Phys. Rev. B85(20), 201304 (2012). [CrossRef]
  18. N. Kamaraju, S. Kumar, E. Freysz, and A. K. Sood, “Influence of two photon absorption induced free carriers on coherent polariton and phonon generation in ZnTe crystals,” J. Appl. Phys.107(10), 103102 (2010). [CrossRef]

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