Abstract

We show that the THz radiation emitted in the radial direction by a femtosecond filament created in air is linearly polarized and coherent. By applying an electric field along the filament axis this THz radiation is strongly enhanced and becomes incoherent and not polarized.

© 2007 Optical Society of America

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  1. C.-C. Cheng, E. M. Wright, and J. V. Moloney, "Generation of electromagnetic pulses from plasma channels induced by Femtosecond Light Strings," Phys. Rev. Lett. 87, 213001 (2001).
    [CrossRef] [PubMed]
  2. S. Tzortzakis, G. Méchain, G.-B. Patalano, Y.-B. André, M. Franco, B. Prade, A. Mysyrowicz, J.-M. Munier, M. Gheudin, G. Beaudin, P. Encrenaz, "Coherent subterahertz radiation from femtosecond infrared filaments in air," Opt. Lett. 27, 1944 (2002).
    [CrossRef]
  3. G. Méchain, S. Tzortzakis, B. Prade, M. Franco, A, Mysyrowicz, B. Leriche, "Calorimetric detection of THz radiation from femtosecond filaments in air," Appl. Phys. B 77, 707 (2003).
    [CrossRef]
  4. P. Sprangle, J. Peñano, B. Hafizi, and C. Kapetanakos, "Ultrashort laser pulses and electromagnetic pulse generation in air and on dielectric surfaces," Phys. Rev. E 69, 066415 (2004).
    [CrossRef]
  5. G. Shvets, I. Kaganovich, and E. Startsev, Comment on "Generation of Electromagnetic Pulses from Plasma Channels Induced by Femtosecond Light Strings," Phys. Rev. Lett. 89, 139301 (2002).
    [CrossRef] [PubMed]
  6. C.-C. Cheng, E. M. Wright, and J. V. Moloney, "Reply to the Comment by Gennady Shvets, Igor Kaganovich, and Edward Startsev," Phys. Rev. Lett. 89, 139302 (2002).
    [CrossRef]
  7. V. T. Tikhonchuk, "Comment on "Generation of Electromagnetic Pulses from Plasma Channels Induced by Femtosecond Light Strings," Phys. Rev. Lett. 89, 209301 (2002).
    [CrossRef] [PubMed]
  8. W. Hoyer, A. Knorr, J. V. Moloney, E. M. Wright, M. Kira, S. W. Koch, "Photoluminescence and terahertz emission from femtosecond laser-induced plasma channels," Phys. Rev. Lett. 94, 115004 (2005).
    [CrossRef] [PubMed]
  9. D. Strickland and G. Mourou, "Compression of amplified chirped optical pulses," Opt. Commun. 56, 219 (1985).
    [CrossRef]
  10. H. Wille, M. Rodriguez, J. Kasparian, D. Mondelain, J. Yu, A. Mysyrowicz, R. Sauerbrey, J. P. Wolf, and L. Wöste, "Teramobile: a mobile femtosecond-terawatt laser and detection system," Eur. Phys. J. AP 20, 183 (2002).
    [CrossRef]
  11. T. Löffler, F. Jacob, and H. G. Roskos, "Generation of terahertz pulses by photoionization of electrically biased air," Appl. Phys. Lett. 77, 453 (2000).
    [CrossRef]
  12. A. Beker, N. Aközbek, K. Vijayalakshmi, E. Oral, C. M. Bowden, S. L. Chin, "Intensity clamping and re-focusing of intense femtosecond laser pulses in nitrogen molecular gas," Appl. Phys. B 73, 287 (2001).
    [CrossRef]
  13. S. Tzortzakis, B. Prade, M. Franco, A. Mysyrowicz, S. Hüller, and P. Mora, "Femtosecond laser-guided electric discharge in air," Phys. Rev. E 64, 057401 (2001).
    [CrossRef]
  14. S. Tzortzakis, B. Prade, M. Franco, and A. Mysyrowicz, "Time-evolution of the plasma channel at the trail of a self-guided IR femtosecond laser pulse in air," Opt. Commun. 181, 123 (2000).
    [CrossRef]

2005 (1)

W. Hoyer, A. Knorr, J. V. Moloney, E. M. Wright, M. Kira, S. W. Koch, "Photoluminescence and terahertz emission from femtosecond laser-induced plasma channels," Phys. Rev. Lett. 94, 115004 (2005).
[CrossRef] [PubMed]

2004 (1)

P. Sprangle, J. Peñano, B. Hafizi, and C. Kapetanakos, "Ultrashort laser pulses and electromagnetic pulse generation in air and on dielectric surfaces," Phys. Rev. E 69, 066415 (2004).
[CrossRef]

2003 (1)

G. Méchain, S. Tzortzakis, B. Prade, M. Franco, A, Mysyrowicz, B. Leriche, "Calorimetric detection of THz radiation from femtosecond filaments in air," Appl. Phys. B 77, 707 (2003).
[CrossRef]

2002 (5)

S. Tzortzakis, G. Méchain, G.-B. Patalano, Y.-B. André, M. Franco, B. Prade, A. Mysyrowicz, J.-M. Munier, M. Gheudin, G. Beaudin, P. Encrenaz, "Coherent subterahertz radiation from femtosecond infrared filaments in air," Opt. Lett. 27, 1944 (2002).
[CrossRef]

G. Shvets, I. Kaganovich, and E. Startsev, Comment on "Generation of Electromagnetic Pulses from Plasma Channels Induced by Femtosecond Light Strings," Phys. Rev. Lett. 89, 139301 (2002).
[CrossRef] [PubMed]

C.-C. Cheng, E. M. Wright, and J. V. Moloney, "Reply to the Comment by Gennady Shvets, Igor Kaganovich, and Edward Startsev," Phys. Rev. Lett. 89, 139302 (2002).
[CrossRef]

V. T. Tikhonchuk, "Comment on "Generation of Electromagnetic Pulses from Plasma Channels Induced by Femtosecond Light Strings," Phys. Rev. Lett. 89, 209301 (2002).
[CrossRef] [PubMed]

H. Wille, M. Rodriguez, J. Kasparian, D. Mondelain, J. Yu, A. Mysyrowicz, R. Sauerbrey, J. P. Wolf, and L. Wöste, "Teramobile: a mobile femtosecond-terawatt laser and detection system," Eur. Phys. J. AP 20, 183 (2002).
[CrossRef]

2001 (3)

C.-C. Cheng, E. M. Wright, and J. V. Moloney, "Generation of electromagnetic pulses from plasma channels induced by Femtosecond Light Strings," Phys. Rev. Lett. 87, 213001 (2001).
[CrossRef] [PubMed]

A. Beker, N. Aközbek, K. Vijayalakshmi, E. Oral, C. M. Bowden, S. L. Chin, "Intensity clamping and re-focusing of intense femtosecond laser pulses in nitrogen molecular gas," Appl. Phys. B 73, 287 (2001).
[CrossRef]

S. Tzortzakis, B. Prade, M. Franco, A. Mysyrowicz, S. Hüller, and P. Mora, "Femtosecond laser-guided electric discharge in air," Phys. Rev. E 64, 057401 (2001).
[CrossRef]

2000 (2)

S. Tzortzakis, B. Prade, M. Franco, and A. Mysyrowicz, "Time-evolution of the plasma channel at the trail of a self-guided IR femtosecond laser pulse in air," Opt. Commun. 181, 123 (2000).
[CrossRef]

T. Löffler, F. Jacob, and H. G. Roskos, "Generation of terahertz pulses by photoionization of electrically biased air," Appl. Phys. Lett. 77, 453 (2000).
[CrossRef]

1985 (1)

D. Strickland and G. Mourou, "Compression of amplified chirped optical pulses," Opt. Commun. 56, 219 (1985).
[CrossRef]

Aközbek, N.

A. Beker, N. Aközbek, K. Vijayalakshmi, E. Oral, C. M. Bowden, S. L. Chin, "Intensity clamping and re-focusing of intense femtosecond laser pulses in nitrogen molecular gas," Appl. Phys. B 73, 287 (2001).
[CrossRef]

André, Y.-B.

Beaudin, G.

Beker, A.

A. Beker, N. Aközbek, K. Vijayalakshmi, E. Oral, C. M. Bowden, S. L. Chin, "Intensity clamping and re-focusing of intense femtosecond laser pulses in nitrogen molecular gas," Appl. Phys. B 73, 287 (2001).
[CrossRef]

Bowden, C. M.

A. Beker, N. Aközbek, K. Vijayalakshmi, E. Oral, C. M. Bowden, S. L. Chin, "Intensity clamping and re-focusing of intense femtosecond laser pulses in nitrogen molecular gas," Appl. Phys. B 73, 287 (2001).
[CrossRef]

Cheng, C.-C.

C.-C. Cheng, E. M. Wright, and J. V. Moloney, "Reply to the Comment by Gennady Shvets, Igor Kaganovich, and Edward Startsev," Phys. Rev. Lett. 89, 139302 (2002).
[CrossRef]

C.-C. Cheng, E. M. Wright, and J. V. Moloney, "Generation of electromagnetic pulses from plasma channels induced by Femtosecond Light Strings," Phys. Rev. Lett. 87, 213001 (2001).
[CrossRef] [PubMed]

Chin, S. L.

A. Beker, N. Aközbek, K. Vijayalakshmi, E. Oral, C. M. Bowden, S. L. Chin, "Intensity clamping and re-focusing of intense femtosecond laser pulses in nitrogen molecular gas," Appl. Phys. B 73, 287 (2001).
[CrossRef]

Encrenaz, P.

Franco, M.

G. Méchain, S. Tzortzakis, B. Prade, M. Franco, A, Mysyrowicz, B. Leriche, "Calorimetric detection of THz radiation from femtosecond filaments in air," Appl. Phys. B 77, 707 (2003).
[CrossRef]

S. Tzortzakis, G. Méchain, G.-B. Patalano, Y.-B. André, M. Franco, B. Prade, A. Mysyrowicz, J.-M. Munier, M. Gheudin, G. Beaudin, P. Encrenaz, "Coherent subterahertz radiation from femtosecond infrared filaments in air," Opt. Lett. 27, 1944 (2002).
[CrossRef]

S. Tzortzakis, B. Prade, M. Franco, A. Mysyrowicz, S. Hüller, and P. Mora, "Femtosecond laser-guided electric discharge in air," Phys. Rev. E 64, 057401 (2001).
[CrossRef]

S. Tzortzakis, B. Prade, M. Franco, and A. Mysyrowicz, "Time-evolution of the plasma channel at the trail of a self-guided IR femtosecond laser pulse in air," Opt. Commun. 181, 123 (2000).
[CrossRef]

Gheudin, M.

Hafizi, B.

P. Sprangle, J. Peñano, B. Hafizi, and C. Kapetanakos, "Ultrashort laser pulses and electromagnetic pulse generation in air and on dielectric surfaces," Phys. Rev. E 69, 066415 (2004).
[CrossRef]

Hoyer, W.

W. Hoyer, A. Knorr, J. V. Moloney, E. M. Wright, M. Kira, S. W. Koch, "Photoluminescence and terahertz emission from femtosecond laser-induced plasma channels," Phys. Rev. Lett. 94, 115004 (2005).
[CrossRef] [PubMed]

Hüller, S.

S. Tzortzakis, B. Prade, M. Franco, A. Mysyrowicz, S. Hüller, and P. Mora, "Femtosecond laser-guided electric discharge in air," Phys. Rev. E 64, 057401 (2001).
[CrossRef]

Jacob, F.

T. Löffler, F. Jacob, and H. G. Roskos, "Generation of terahertz pulses by photoionization of electrically biased air," Appl. Phys. Lett. 77, 453 (2000).
[CrossRef]

Kaganovich, I.

G. Shvets, I. Kaganovich, and E. Startsev, Comment on "Generation of Electromagnetic Pulses from Plasma Channels Induced by Femtosecond Light Strings," Phys. Rev. Lett. 89, 139301 (2002).
[CrossRef] [PubMed]

Kapetanakos, C.

P. Sprangle, J. Peñano, B. Hafizi, and C. Kapetanakos, "Ultrashort laser pulses and electromagnetic pulse generation in air and on dielectric surfaces," Phys. Rev. E 69, 066415 (2004).
[CrossRef]

Kasparian, J.

H. Wille, M. Rodriguez, J. Kasparian, D. Mondelain, J. Yu, A. Mysyrowicz, R. Sauerbrey, J. P. Wolf, and L. Wöste, "Teramobile: a mobile femtosecond-terawatt laser and detection system," Eur. Phys. J. AP 20, 183 (2002).
[CrossRef]

Kira, M.

W. Hoyer, A. Knorr, J. V. Moloney, E. M. Wright, M. Kira, S. W. Koch, "Photoluminescence and terahertz emission from femtosecond laser-induced plasma channels," Phys. Rev. Lett. 94, 115004 (2005).
[CrossRef] [PubMed]

Knorr, A.

W. Hoyer, A. Knorr, J. V. Moloney, E. M. Wright, M. Kira, S. W. Koch, "Photoluminescence and terahertz emission from femtosecond laser-induced plasma channels," Phys. Rev. Lett. 94, 115004 (2005).
[CrossRef] [PubMed]

Koch, S. W.

W. Hoyer, A. Knorr, J. V. Moloney, E. M. Wright, M. Kira, S. W. Koch, "Photoluminescence and terahertz emission from femtosecond laser-induced plasma channels," Phys. Rev. Lett. 94, 115004 (2005).
[CrossRef] [PubMed]

Löffler, T.

T. Löffler, F. Jacob, and H. G. Roskos, "Generation of terahertz pulses by photoionization of electrically biased air," Appl. Phys. Lett. 77, 453 (2000).
[CrossRef]

Méchain, G.

Moloney, J. V.

W. Hoyer, A. Knorr, J. V. Moloney, E. M. Wright, M. Kira, S. W. Koch, "Photoluminescence and terahertz emission from femtosecond laser-induced plasma channels," Phys. Rev. Lett. 94, 115004 (2005).
[CrossRef] [PubMed]

C.-C. Cheng, E. M. Wright, and J. V. Moloney, "Reply to the Comment by Gennady Shvets, Igor Kaganovich, and Edward Startsev," Phys. Rev. Lett. 89, 139302 (2002).
[CrossRef]

C.-C. Cheng, E. M. Wright, and J. V. Moloney, "Generation of electromagnetic pulses from plasma channels induced by Femtosecond Light Strings," Phys. Rev. Lett. 87, 213001 (2001).
[CrossRef] [PubMed]

Mondelain, D.

H. Wille, M. Rodriguez, J. Kasparian, D. Mondelain, J. Yu, A. Mysyrowicz, R. Sauerbrey, J. P. Wolf, and L. Wöste, "Teramobile: a mobile femtosecond-terawatt laser and detection system," Eur. Phys. J. AP 20, 183 (2002).
[CrossRef]

Mora, P.

S. Tzortzakis, B. Prade, M. Franco, A. Mysyrowicz, S. Hüller, and P. Mora, "Femtosecond laser-guided electric discharge in air," Phys. Rev. E 64, 057401 (2001).
[CrossRef]

Mourou, G.

D. Strickland and G. Mourou, "Compression of amplified chirped optical pulses," Opt. Commun. 56, 219 (1985).
[CrossRef]

Munier, J.-M.

Mysyrowicz, A.

S. Tzortzakis, G. Méchain, G.-B. Patalano, Y.-B. André, M. Franco, B. Prade, A. Mysyrowicz, J.-M. Munier, M. Gheudin, G. Beaudin, P. Encrenaz, "Coherent subterahertz radiation from femtosecond infrared filaments in air," Opt. Lett. 27, 1944 (2002).
[CrossRef]

H. Wille, M. Rodriguez, J. Kasparian, D. Mondelain, J. Yu, A. Mysyrowicz, R. Sauerbrey, J. P. Wolf, and L. Wöste, "Teramobile: a mobile femtosecond-terawatt laser and detection system," Eur. Phys. J. AP 20, 183 (2002).
[CrossRef]

S. Tzortzakis, B. Prade, M. Franco, A. Mysyrowicz, S. Hüller, and P. Mora, "Femtosecond laser-guided electric discharge in air," Phys. Rev. E 64, 057401 (2001).
[CrossRef]

S. Tzortzakis, B. Prade, M. Franco, and A. Mysyrowicz, "Time-evolution of the plasma channel at the trail of a self-guided IR femtosecond laser pulse in air," Opt. Commun. 181, 123 (2000).
[CrossRef]

Oral, E.

A. Beker, N. Aközbek, K. Vijayalakshmi, E. Oral, C. M. Bowden, S. L. Chin, "Intensity clamping and re-focusing of intense femtosecond laser pulses in nitrogen molecular gas," Appl. Phys. B 73, 287 (2001).
[CrossRef]

Patalano, G.-B.

Peñano, J.

P. Sprangle, J. Peñano, B. Hafizi, and C. Kapetanakos, "Ultrashort laser pulses and electromagnetic pulse generation in air and on dielectric surfaces," Phys. Rev. E 69, 066415 (2004).
[CrossRef]

Prade, B.

G. Méchain, S. Tzortzakis, B. Prade, M. Franco, A, Mysyrowicz, B. Leriche, "Calorimetric detection of THz radiation from femtosecond filaments in air," Appl. Phys. B 77, 707 (2003).
[CrossRef]

S. Tzortzakis, G. Méchain, G.-B. Patalano, Y.-B. André, M. Franco, B. Prade, A. Mysyrowicz, J.-M. Munier, M. Gheudin, G. Beaudin, P. Encrenaz, "Coherent subterahertz radiation from femtosecond infrared filaments in air," Opt. Lett. 27, 1944 (2002).
[CrossRef]

S. Tzortzakis, B. Prade, M. Franco, A. Mysyrowicz, S. Hüller, and P. Mora, "Femtosecond laser-guided electric discharge in air," Phys. Rev. E 64, 057401 (2001).
[CrossRef]

S. Tzortzakis, B. Prade, M. Franco, and A. Mysyrowicz, "Time-evolution of the plasma channel at the trail of a self-guided IR femtosecond laser pulse in air," Opt. Commun. 181, 123 (2000).
[CrossRef]

Rodriguez, M.

H. Wille, M. Rodriguez, J. Kasparian, D. Mondelain, J. Yu, A. Mysyrowicz, R. Sauerbrey, J. P. Wolf, and L. Wöste, "Teramobile: a mobile femtosecond-terawatt laser and detection system," Eur. Phys. J. AP 20, 183 (2002).
[CrossRef]

Roskos, H. G.

T. Löffler, F. Jacob, and H. G. Roskos, "Generation of terahertz pulses by photoionization of electrically biased air," Appl. Phys. Lett. 77, 453 (2000).
[CrossRef]

Sauerbrey, R.

H. Wille, M. Rodriguez, J. Kasparian, D. Mondelain, J. Yu, A. Mysyrowicz, R. Sauerbrey, J. P. Wolf, and L. Wöste, "Teramobile: a mobile femtosecond-terawatt laser and detection system," Eur. Phys. J. AP 20, 183 (2002).
[CrossRef]

Shvets, G.

G. Shvets, I. Kaganovich, and E. Startsev, Comment on "Generation of Electromagnetic Pulses from Plasma Channels Induced by Femtosecond Light Strings," Phys. Rev. Lett. 89, 139301 (2002).
[CrossRef] [PubMed]

Sprangle, P.

P. Sprangle, J. Peñano, B. Hafizi, and C. Kapetanakos, "Ultrashort laser pulses and electromagnetic pulse generation in air and on dielectric surfaces," Phys. Rev. E 69, 066415 (2004).
[CrossRef]

Startsev, E.

G. Shvets, I. Kaganovich, and E. Startsev, Comment on "Generation of Electromagnetic Pulses from Plasma Channels Induced by Femtosecond Light Strings," Phys. Rev. Lett. 89, 139301 (2002).
[CrossRef] [PubMed]

Strickland, D.

D. Strickland and G. Mourou, "Compression of amplified chirped optical pulses," Opt. Commun. 56, 219 (1985).
[CrossRef]

Tikhonchuk, V. T.

V. T. Tikhonchuk, "Comment on "Generation of Electromagnetic Pulses from Plasma Channels Induced by Femtosecond Light Strings," Phys. Rev. Lett. 89, 209301 (2002).
[CrossRef] [PubMed]

Tzortzakis, S.

G. Méchain, S. Tzortzakis, B. Prade, M. Franco, A, Mysyrowicz, B. Leriche, "Calorimetric detection of THz radiation from femtosecond filaments in air," Appl. Phys. B 77, 707 (2003).
[CrossRef]

S. Tzortzakis, G. Méchain, G.-B. Patalano, Y.-B. André, M. Franco, B. Prade, A. Mysyrowicz, J.-M. Munier, M. Gheudin, G. Beaudin, P. Encrenaz, "Coherent subterahertz radiation from femtosecond infrared filaments in air," Opt. Lett. 27, 1944 (2002).
[CrossRef]

S. Tzortzakis, B. Prade, M. Franco, A. Mysyrowicz, S. Hüller, and P. Mora, "Femtosecond laser-guided electric discharge in air," Phys. Rev. E 64, 057401 (2001).
[CrossRef]

S. Tzortzakis, B. Prade, M. Franco, and A. Mysyrowicz, "Time-evolution of the plasma channel at the trail of a self-guided IR femtosecond laser pulse in air," Opt. Commun. 181, 123 (2000).
[CrossRef]

Vijayalakshmi, K.

A. Beker, N. Aközbek, K. Vijayalakshmi, E. Oral, C. M. Bowden, S. L. Chin, "Intensity clamping and re-focusing of intense femtosecond laser pulses in nitrogen molecular gas," Appl. Phys. B 73, 287 (2001).
[CrossRef]

Wille, H.

H. Wille, M. Rodriguez, J. Kasparian, D. Mondelain, J. Yu, A. Mysyrowicz, R. Sauerbrey, J. P. Wolf, and L. Wöste, "Teramobile: a mobile femtosecond-terawatt laser and detection system," Eur. Phys. J. AP 20, 183 (2002).
[CrossRef]

Wolf, J. P.

H. Wille, M. Rodriguez, J. Kasparian, D. Mondelain, J. Yu, A. Mysyrowicz, R. Sauerbrey, J. P. Wolf, and L. Wöste, "Teramobile: a mobile femtosecond-terawatt laser and detection system," Eur. Phys. J. AP 20, 183 (2002).
[CrossRef]

Wöste, L.

H. Wille, M. Rodriguez, J. Kasparian, D. Mondelain, J. Yu, A. Mysyrowicz, R. Sauerbrey, J. P. Wolf, and L. Wöste, "Teramobile: a mobile femtosecond-terawatt laser and detection system," Eur. Phys. J. AP 20, 183 (2002).
[CrossRef]

Wright, E. M.

W. Hoyer, A. Knorr, J. V. Moloney, E. M. Wright, M. Kira, S. W. Koch, "Photoluminescence and terahertz emission from femtosecond laser-induced plasma channels," Phys. Rev. Lett. 94, 115004 (2005).
[CrossRef] [PubMed]

C.-C. Cheng, E. M. Wright, and J. V. Moloney, "Reply to the Comment by Gennady Shvets, Igor Kaganovich, and Edward Startsev," Phys. Rev. Lett. 89, 139302 (2002).
[CrossRef]

C.-C. Cheng, E. M. Wright, and J. V. Moloney, "Generation of electromagnetic pulses from plasma channels induced by Femtosecond Light Strings," Phys. Rev. Lett. 87, 213001 (2001).
[CrossRef] [PubMed]

Yu, J.

H. Wille, M. Rodriguez, J. Kasparian, D. Mondelain, J. Yu, A. Mysyrowicz, R. Sauerbrey, J. P. Wolf, and L. Wöste, "Teramobile: a mobile femtosecond-terawatt laser and detection system," Eur. Phys. J. AP 20, 183 (2002).
[CrossRef]

Appl. Phys. B (2)

G. Méchain, S. Tzortzakis, B. Prade, M. Franco, A, Mysyrowicz, B. Leriche, "Calorimetric detection of THz radiation from femtosecond filaments in air," Appl. Phys. B 77, 707 (2003).
[CrossRef]

A. Beker, N. Aközbek, K. Vijayalakshmi, E. Oral, C. M. Bowden, S. L. Chin, "Intensity clamping and re-focusing of intense femtosecond laser pulses in nitrogen molecular gas," Appl. Phys. B 73, 287 (2001).
[CrossRef]

Appl. Phys. Lett. (1)

T. Löffler, F. Jacob, and H. G. Roskos, "Generation of terahertz pulses by photoionization of electrically biased air," Appl. Phys. Lett. 77, 453 (2000).
[CrossRef]

Eur. Phys. J. AP (1)

H. Wille, M. Rodriguez, J. Kasparian, D. Mondelain, J. Yu, A. Mysyrowicz, R. Sauerbrey, J. P. Wolf, and L. Wöste, "Teramobile: a mobile femtosecond-terawatt laser and detection system," Eur. Phys. J. AP 20, 183 (2002).
[CrossRef]

Opt. Commun. (2)

D. Strickland and G. Mourou, "Compression of amplified chirped optical pulses," Opt. Commun. 56, 219 (1985).
[CrossRef]

S. Tzortzakis, B. Prade, M. Franco, and A. Mysyrowicz, "Time-evolution of the plasma channel at the trail of a self-guided IR femtosecond laser pulse in air," Opt. Commun. 181, 123 (2000).
[CrossRef]

Opt. Lett. (1)

Phys. Rev. E (2)

P. Sprangle, J. Peñano, B. Hafizi, and C. Kapetanakos, "Ultrashort laser pulses and electromagnetic pulse generation in air and on dielectric surfaces," Phys. Rev. E 69, 066415 (2004).
[CrossRef]

S. Tzortzakis, B. Prade, M. Franco, A. Mysyrowicz, S. Hüller, and P. Mora, "Femtosecond laser-guided electric discharge in air," Phys. Rev. E 64, 057401 (2001).
[CrossRef]

Phys. Rev. Lett. (5)

G. Shvets, I. Kaganovich, and E. Startsev, Comment on "Generation of Electromagnetic Pulses from Plasma Channels Induced by Femtosecond Light Strings," Phys. Rev. Lett. 89, 139301 (2002).
[CrossRef] [PubMed]

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[CrossRef]

V. T. Tikhonchuk, "Comment on "Generation of Electromagnetic Pulses from Plasma Channels Induced by Femtosecond Light Strings," Phys. Rev. Lett. 89, 209301 (2002).
[CrossRef] [PubMed]

W. Hoyer, A. Knorr, J. V. Moloney, E. M. Wright, M. Kira, S. W. Koch, "Photoluminescence and terahertz emission from femtosecond laser-induced plasma channels," Phys. Rev. Lett. 94, 115004 (2005).
[CrossRef] [PubMed]

C.-C. Cheng, E. M. Wright, and J. V. Moloney, "Generation of electromagnetic pulses from plasma channels induced by Femtosecond Light Strings," Phys. Rev. Lett. 87, 213001 (2001).
[CrossRef] [PubMed]

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Figures (6)

Fig. 1.
Fig. 1.

Experimental Set-up. See the text for a detailed description.

Fig. 2.
Fig. 2.

Polarization properties of the THz field in absence of applied electric field. The graph shows both perpendicular (solid line) and parallel (dotted line) components of the THz field (the time axis represents the response of our detection system).

Fig. 3.
Fig. 3.

Coherence properties of the THz radiation in the case of a single filament (a) and in the case of the multi-filamentation with the Teramobile laser beam (b). The x axis indicates the distance between the filament and the reflecting mirror.

Fig. 4.
Fig. 4.

Evolution of the horizontal component of the THz signal (a) and the peaks of the current signal (b) with the applied voltage. In the graph of the Fig. 4(a) the area of the THz signals in the inset is plotted as function of the applied voltage, the experimental data are well fitted by a quadratic law (continuous line).

Fig. 5.
Fig. 5.

Polarization properties of the THz field in presence of applied electric field. a) Scheme of the polarization and coherence experiment. Figure 5(b) shows both perpendicular (solid line) and parallel (dotted line) components of the THz field. Figure 5(c) shows the absence of interference of the THz radiation emitted by a charged filament. Figure 5(d) shows the complete polarization diagram of the THz radiation emitted by a single charged filament.

Fig. 6.
Fig. 6.

Signal of the radial THz emission from the filament in presence of a weak electric field applied along the filament. The second peak of the signal increases as the electric field increases. The first peak does not depend on the applied electric field. The delay between the two peaks for weak applied electric fields is about 2ns.

Equations (1)

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ΔP = 4 π 2 RL c 2 v c 2 k B ΔTΔν .

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