Skip to main content Accessibility help
×
Home

Strong terahertz radiation generation by cosh-Gaussian laser beams in axially magnetized collisional plasma under non-relativistic ponderomotive regime

  • Prateek Varshney (a1), Ajit Upadhayay (a1), K. Madhubabu (a1), Vivek Sajal (a2) and J. A. Chakera (a1)...

Abstract

We propose a scheme for terahertz (THz) radiation generation by non-linear mixing of two cosh-Gaussian laser beams in axially magnetized plasma with spatially periodic density ripple where electron-neutral collisions have been taken into account. The laser beams exert a non-linear ponderomotive force due to spatial non-uniformity in the intensity. The plasma electrons acquire non-linear oscillatory velocity under the influence of ponderomotive force. This oscillatory velocity couples with preformed density ripples (n′ = neiαz) to generate a strong transient non-linear current that resonantly derives THz radiation of frequency ~ωh (upper hybrid frequency). Laser frequencies (ω1 and ω2) are chosen such that the beat frequency (ω) lies in the THz region. The periodicity of density ripple provides phase-matching conditions (ω = ω1 − ω2 and $\vec k = \vec k_1 - \vec k_2 + {\rm \vec \alpha} $ ) to transfer maximum momentum from laser to THz radiation. The axially applied external magnetic field can be utilized to enhance the non-linear coupling and control various parameters of generated THz wave. The effects of decentered parameters (b), collisional frequency (νen), and magnetic field strength (B0 = ωcm/e) are analyzed for strong THz radiation generation. Analytical results show that the amplitude of THz wave enhances with decentered parameters as well as with the magnitude of axially applied magnetic field. The THz amplitude is found to be highly sensitive to collision frequency.

Copyright

Corresponding author

Author for correspondence: Prateek Varshney, Laser Plasma Section, Raja Ramanna Center for Advance Technology, Indore, Madhya Pradesh-452013, India, E-mail: varshneyprateek28@yahoo.com, varshneyprateek28@gmail.com

References

Hide All
Antonsen, TM Jr, Palastro, J and Milchberg, HM (2007) Excitation of terahertz radiation by laser pulses in nonuniform plasma channels. Physics of Plasmas (1994–Present) 14, 033107.
Babushkin, I, Kuehn, W, Köhler, C, Skupin, S, Bergé, L, Reimann, K, Woerner, M, Herrmann, J and Elsaesser, T (2010a) Ultrafast spatiotemporal dynamics of terahertz generation by ionizing two-color femtosecond pulses in gases. Physical Review Letters 105, 053903.
Babushkin, I, Skupin, S and Herrmann, J (2010b) Generation of terahertz radiation from ionizing two-color laser pulses in Ar filled metallic hollow waveguides. Optics Express 18, 96589663.
Bakhtiari, F, Esmaeilzadeh, M and Ghafary, B (2017) Terahertz radiation with high power and high efficiency in a magnetized plasma. Physics of Plasmas 24, 073112.
Bakhtiari, F, Golmohammady, S, Yousefi, M, Kashani, FD and Ghafary, B (2015a) Generation of terahertz radiation in collisional plasma by beating of two dark hollow laser beams. Laser and Particle Beams 33, 463472.
Bakhtiari, F, Yousefi, M, Golmohammady, S, Jazayeri, SM and Ghafary, B (2015b) Generation of terahertz radiation by beating of two circular flat-topped laser beams in collisional plasma. Laser and Particle Beams 33, 713722.
Bass, M, Franken, P, Ward, J and Weinreich, G (1962) Optical rectification. Physical Review Letters 9, 446.
Beard, MC, Turner, GM and Schmuttenmaer, CA (2002) Terahertz spectroscopy. The Journal of Physical Chemistry B 106, 71467159.
Bhasin, L and Tripathi, V (2009) Terahertz generation via optical rectification of x-mode laser in a rippled density magnetized plasma. Physics of Plasmas (1994–Present) 16, 103105.
Biedron, SG, Lewellen, JW, Milton, SV, Gopalsami, N, Schneider, JF, Skubal, L, Li, Y, Virgo, M, Gallerano, GP and Doria, A (2007) Compact, high-power electron beam based terahertz sources. Proceedings of the IEEE 95, 16661678.
Carr, GL, Martin, MC, Mckinney, WR, Jordan, K, Neil, GR and Williams, GP (2002) High-power terahertz radiation from relativistic electrons. Nature 420, 153156.
Chen, FF and Trivelpiece, A (1976) Introduction to plasma physics. Physics Today 29(10), pp. 54. https://doi.org/10.1063/1.3024417
Chen, Y, Yamaguchi, M, Wang, M and Zhang, X-C (2007) Terahertz pulse generation from noble gases. Applied Physics Letters 91, 251116.
Cho, MH, Kim, YK, Suk, H, Ersfeld, B, Jaroszynski, DA and Hur, MS (2015) Strong terahertz emission from electromagnetic diffusion near cutoff in plasma. New Journal of Physics 17, 043045.
Cook, D and Hochstrasser, R (2000) Intense terahertz pulses by four-wave rectification in air. Optics Letters 25, 12101212.
Dai, J, Xie, X and Zhang, X-C (2006) Detection of broadband terahertz waves with a laser-induced plasma in gases. Physical Review Letters 97, 103903.
Dragoman, D and Dragoman, M (2004) Terahertz fields and applications. Progress in Quantum Electronics 28, 166.
Federici, JF, Schulkin, B, Huang, F, Gary, D, Barat, R, Oliveira, F and Zimdars, D (2005) THz imaging and sensing for security applications – explosives, weapons and drugs. Semiconductor Science and Technology 20, S266.
Ferguson, B, Wang, S, Gray, D, Abbott, D and Zhang, X (2002) Towards functional 3D T-ray imaging. Physics in Medicine and Biology 47, 3735.
Ferguson, B and Zhang, X-C (2002) Materials for terahertz science and technology. Nature Materials 1, 2633.
Gill, R, Singh, D and Malik, HK (2017) Multifocal terahertz radiation by intense lasers in rippled plasma. Journal of Theoretical and Applied Physics 11, p. 103 https://doi.org/10.1007/s40094-017-0249-9
Globus, T, Woolard, D, Bykhovskaia, M, Gelmont, B, Werbos, L and Samuels, A (2003) THz-frequency spectroscopic sensing of DNA and related biological materials. International Journal of High Speed Electronics and Systems 13, 903936.
Hamster, H, Sullivan, A, Gordon, S and Falcone, R (1994) Short-pulse terahertz radiation from high-intensity-laser-produced plasmas. Physical Review E 49, 671.
Hamster, H, Sullivan, A, Gordon, S, White, W and Falcone, R (1993) Subpicosecond, electromagnetic pulses from intense laser-plasma interaction. Physical Review Letters 71, 2725.
Houard, A, Liu, Y, Prade, B, Tikhonchuk, VT and Mysyrowicz, A (2008) Strong enhancement of terahertz radiation from laser filaments in air by a static electric field. Physical Review Letters 100, 255006.
Hu, B and Nuss, M (1995) Imaging with terahertz waves. Optics Letters 20, 17161718.
Kadow, C, Jackson, A, Gossard, A, Matsuura, S and Blake, G (2000) Self-assembled ErAs islands in GaAs for optical-heterodyne THz generation. Applied Physics Letters 76, 35103512.
Kawase, K, Sato, M, Taniuchi, T and Ito, H (1996) Coherent tunable THz-wave generation from LiNbO3 with monolithic grating coupler. Applied Physics Letters 68, 24832485.
Kim, K-Y, Taylor, A, Glownia, J and Rodriguez, G (2008) Coherent control of terahertz supercontinuum generation in ultrafast laser–gas interactions. Nature Photonics 2, 605609.
Kumar, M, Bhasin, L and Tripathi, V (2010) Resonant beat wave excitation of terahertz radiation in a magnetized plasma channel. Physica Scripta 81, 045504.
Kumar, M, Lee, K, Hee Park, S, Uk Jeong, Y and Vinokurov, N (2017) Terahertz radiation generation by nonlinear mixing of two lasers in a plasma with density hill. Physics of Plasmas 24, 033104.
Liu, C and Tripathi, V (2009) Tunable terahertz radiation from a tunnel ionized magnetized plasma cylinder. Journal of Applied Physics 105, 013313.
Liu, Y, Houard, A, Prade, B, Akturk, S, Mysyrowicz, A and Tikhonchuk, V (2007) Terahertz radiation source in air based on bifilamentation of femtosecond laser pulses. Physical Review Letters 99, 135002.
Löffler, T, Jacob, F and Roskos, H (2000) Generation of terahertz pulses by photoionization of electrically biased air. Applied Physics Letters 77, 453455.
Malik, AK and Malik, HK (2013) Tuning and focusing of terahertz radiation by DC magnetic field in a laser beating process. IEEE Journal of Quantum Electronics 49, 232237.
Malik, AK, Malik, HK and Kawata, S (2010) Investigations on terahertz radiation generated by two superposed femtosecond laser pulses. Journal of Applied Physics 107, 113105.
Malik, AK, Malik, HK and Stroth, U (2011) Strong terahertz radiation by beating of spatial-triangular lasers in a plasma. Applied Physics Letters 99, 071107.
Malik, AK, Malik, HK and Stroth, U (2012) Terahertz radiation generation by beating of two spatial-Gaussian lasers in the presence of a static magnetic field. Physical Review E 85, 016401.
Malik, HK (2015) Terahertz radiation generation by lasers with remarkable efficiency in electron–positron plasma. Physics Letters A 379, 28262829.
Malik, HK and Malik, AK (2011) Tunable and collimated terahertz radiation generation by femtosecond laser pulses. Applied Physics Letters 99, 251101.
Malik, HK and Malik, AK (2012) Strong and collimated terahertz radiation by super-Gaussian lasers. EPL (Europhysics Letters) 100, 45001.
Malik, KH (2014) Density bunch formation by microwave in a plasma-filled cylindrical waveguide. EPL (Europhysics Letters) 106, 55002.
Malik, R, Uma, R and Kumar, P (2017) Two color laser driven THz generation in clustered plasma. Physics of Plasmas 24, 073109.
Mann, KL, Sajal, V, Varshney, P and Sharma, NK (2017) Terahertz radiation generation by pulse slippage of cosh-Gaussian lasers in a corrugated magnetized plasma. Physics of Plasmas 24, 123117.
Mondal, S, Hafez, HA, Ropagnol, X and Ozaki, T (2017) MV/cm terahertz pulses from relativistic laser-plasma interaction characterized by nonlinear terahertz absorption bleaching in n-doped InGaAs. Optics Express 25, 1751117523.
Nafil, RQ, Singh, M, Al-Janabi, A and Sharma, R (2013) THz generation by the beating of two high intense laser beams. Journal of Plasma Physics 79, 657660.
Pai, C-H, Huang, S-Y, Kuo, C-C, Lin, M-W, Wang, J, Chen, S-Y, Lee, C-H and Lin, J-Y (2005) Fabrication of spatial transient-density structures as high-field plasma photonic devices. Physics of Plasmas (1994–Present) 12, 070707.
Pathak, VB, Dahiya, D and Tripathi, V (2009) Coherent terahertz radiation from interaction of electron beam with rippled density plasma. Journal of Applied Physics 105, 013315.
Rawat, P, Rawat, V, Gaur, B and Purohit, G (2017) Generation of terahertz radiation by intense hollow Gaussian laser beam in magnetised plasma under relativistic-ponderomotive regime. Physics of Plasmas 24, 073113.
Rothwell, EJ and Cloud, MJ (2008) Electromagnetic, 2nd edition, CRC Press, Taylor and Francis Group, Boca Raton, p. 211.
Sakai, K (2005) Terahertz Optoelectronics. Springer, Berlin, pp. 6398.
Sharma, R, Monika, A, Sharma, P, Chauhan, P and Ji, A (2010) Interaction of high power laser beam with magnetized plasma and THz generation. Laser and Particle Beams 28, 531537.
Sharma, R and Singh, RK (2014) Terahertz generation by two cross focused laser beams in collisional plasmas. Physics of Plasmas (1994–Present) 21, 073101.
Shen, Y-C (2011) Terahertz pulsed spectroscopy and imaging for pharmaceutical applications: a review. International Journal of Pharmaceutics 417, 4860.
Sheng, Z-M, Wu, H-C, Li, K and Zhang, J (2004) Terahertz radiation from the vacuum-plasma interface driven by ultrashort intense laser pulses. Physical Review E 69, 025401.
Singh, D and Malik, HK (2014) Terahertz generation by mixing of two super-Gaussian laser beams in collisional plasma. Physics of Plasmas 21, 083105.
Singh, D and Malik, KH (2015) Enhancement of terahertz emission in magnetized collisional plasma. Plasma Sources Science and Technology 24, 045001.
Singh, M, Mahmoud, S and Sharma, R (2012) Generation of THz radiation from laser beam filamentation in a magnetized plasma. Contributions to Plasma Physics 52, 243250.
Singh, M, Singh, RK and Sharma, RP (2013) THz generation by cosh-Gaussian lasers in a rippled density plasma. EPL (Europhysics Letters) 104, 35002.
Singh, RK and Sharma, R (2014) Terahertz generation by two cross focused Gaussian laser beams in magnetized plasma. Physics of Plasmas (1994-present) 21, 113109.
Singh, RK, Singh, M, Rajouria, SK and Sharma, R (2017) Strong terahertz emission by optical rectification of shaped laser pulse in transversely magnetized plasma. Physics of Plasmas 24, 073114.
Sodha, MS, Ghatak, AK and Tripathi, VK (1974) Self-Focusing of Laser Beams in Dielectrics, Plasmas and Semiconductors. Tata McGraw-Hill Pub. Co. New Delhi, p. 81.
Tripathi, D, Bhasin, L, Uma, R and Tripathi, V (2010) Terahertz generation by an amplitude-modulated Gaussian laser beam in a rippled density plasma column. Physica Scripta 82, 035504.
Varshnety, P, Sajal, V, Chauhan, P, Kumar, R and Sharma, NK (2014) Effects of transverse static electric field on terahertz radiation generation by beating of two transversely modulated Gaussian laser beams in a plasma. Laser and Particle Beams 32, 375381.
Varshney, P, Sajal, V, Baliyan, S, Sharma, NK, Chauhan, PK and Kumar, R (2015a) Strong terahertz radiation generation by beating of two x-mode spatial triangular lasers in magnetized plasma. Laser and Particle Beams 33, 5158.
Varshney, P, Sajal, V, Singh, KP, Kumar, R and Sharma, NK (2013) Strong terahertz radiation generation by beating of extra-ordinary mode lasers in a rippled density magnetized plasma. Laser and Particle Beams 31, 337344.
Varshney, P, Sajal, V, Singh, KP, Kumar, R and Sharma, NK (2015b) Tunable and efficient terahertz radiation generation by photomixing of two super Gaussian laser pulses in a corrugated magnetized plasma. Journal of Applied Physics 117, 193303.
Varshney, P, Sajal, V, Upadhyay, A, Chakera, JA and Kumar, R (2017) Tunable terahertz radiation generation by nonlinear photomixing of cosh-Gaussian laser pulses in corrugated magnetized plasma. Laser and Particle Beams 35, 279285.
Wang, S, Ferguson, B, Abbott, D and Zhang, X-C (2003) T-ray imaging and tomography. Journal of Biological Physics 29, 247256.
Wang, T-J, Ju, J, Liu, Y, Li, R, Xu, Z and Leang Chin, S (2017) Waveform control of enhanced THz radiation from femtosecond laser filament in air. Applied Physics Letters 110, 221102.
Zeitler, JA, Taday, PF, Newnham, DA, Pepper, M, Gordon, KC and Rades, T (2007) Terahertz pulsed spectroscopy and imaging in the pharmaceutical setting-a review. Journal of Pharmacy and Pharmacology 59, 209223.

Keywords

Metrics

Full text views

Total number of HTML views: 0
Total number of PDF views: 0 *
Loading metrics...

Abstract views

Total abstract views: 0 *
Loading metrics...

* Views captured on Cambridge Core between <date>. This data will be updated every 24 hours.

Usage data cannot currently be displayed